Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 39 Jack No. Signal Definition 3/8 YELLOW+/-: Minor alarm signal, 0.5 A contact 4 -48 VGND 5 NC: not connected 9 -48 V: Subrack power-on signal, output to the column head cabinet, current limited to 0.5 A Note: Refer to Figure 23 for the serial numbers of jacks. T ABLE 23. SIGNAL DEFINITIONS OF J ACKS ON F1 I NTERFACE/EXTERNAL ALARM I NPUT I NTERFACE Jack No. Signal Definition 1/9 ALA1+/-: alarm device 1, external alarm signal, contact switch or optical coupling output 2/10 ALA2+/-: alarm device 2, external alarm signal, contact switch or optical coupling output 3/11 ALA3+/-: alarm device 3, external alarm signal, contact switch or optical coupling output 4/12 ALA4+/-: alarm device 4, external alarm signal, contact switch or optical coupling output 7/14 TData+/-: 64 K codirectional interface device that sends signals 8/15 RData+/-: 64 K codirectional interface device that receives signals Note: Refer to Figure 23 for the jack numbers. The jacks not described in this table are all reserved. Position in Refer to the Overview section of NCP unit. Subrack
ZXMP S330 (V1.3) Hardware Descriptions 40 Confidential and Proprietary Information of ZTE CORPORATION SC Unit Overview The SC unit is the timing unit of ZXMP S330. It comprises one or two SC boards and one SCI board. The grey part in Figure 24 illustrates the positions of SC board and SCI board in ZXMP S330 subrack. FIGURE 24. POSITION OF SC UNIT IN S UBRACK Service interface board Service interface board Service interface board Service interface board Service interface board Service interface board PWR Service interface board Service interface board Service interface board Service interface board Service interface board SCI PWR Service interface board NCPI Service board CS Service board Service board Service board Service board Service board CS Service board Service board Service board Service board Service board SC SC Service board NCP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Figure 25 illustrates the SC unit position in the system and its connection relations with other boards. FIGURE 25. CONNECTIONS AMONG SC UNIT AND OTHER B OARDS Service board NCP board Active SC board Standby SC board SCI Board Reference clock input Clock input from the standby SC board External reference clock output External reference clock input System clock output SC unit Description Position in Subrack Connection Relations
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 41 SC Board Provides system clock signals and system frame head signals for all the units of ZXMP S330. Employs the software-controlled phase-locking circuit to achieve four working modes as follows: f Fast capture mode f Tracing mode f Hold mode f Free-oscillation mode Supports the configuration of eight channels of clock sources simultaneously. And the timing reference can come from any line or tributary, 2 MHz, or 2 Mbit/s interfaces. Selects a timing reference for the NE from the effective timing sources, and allocates it to other units in the NE. Performs protection switching among clock reference sources based on the alarm information of each frequency reference source as well as the clock synchronization status. Implements network-wide clock synchronization. In order to ensure the reliability of synchronization and timing, the SC board supports hot backup mode. That is, two SC boards (one active and one standby) may be configured in the ZXMP S330 system. When both boards are in position and work normally, only the clock of the active SC board is output to the motherboard. If one SC board fails, the system will automatically switch the clock to another SC board. Figure 26 shows the functional blocks of SC board. FIGURE 26. F UNCTIONAL BLOCK DIAGRAM OF SC B OARD Timing reference selection unit Control unit Clock generation and allocation unit Switching control unit Board Line/tributary clock inputs 2.048 MHz 2.048 Mbit/s Power supply unit External clock output unit SCI board SCI board SCI board Functions Functional Blocks
ZXMP S330 (V1.3) Hardware Descriptions 42 Confidential and Proprietary Information of ZTE CORPORATION Table 24 describes the functional blocks. T ABLE 24. DESCRIPTION OF SC B OARD F UNCTIONAL BLOCKS Functional Block Function External clock output unit Selects a clock from line/tributary clock sources, and outputs the external reference clock to SCI board. Timing reference selection unit Selects the system clock reference source from line/tributary clocks or from external clock inputs coming from SCI board. Switching control unit The SC board of ZXMP S330 employs the 1+1 hot backup design. The switching control unit controls the switching between the active and standby SC boards according to the switching status. Clock generation and allocation unit If the SC board is in active state, it generates the system clock and frame head. If the SC board is in standby state, it locks its clock on the active SC board clock. Copies the system clock and frame heads, and sends them to other boards. Control unit Configures and starts the board applications. Power supply unit Filters and allocates the power needed by SC board. The front panel of SC board is illustrated in Figure 27. FIGURE 27. F RONT P ANEL OF SC B OARD 1. Running status indicator (RUN) 2. Clock status indicator (M/S) 3. Alarm indicator (ALM) There are three indicators on the front panel, which are in turn the RUN (green) indicator, the M/S (green) indicator, and the ALM (red) indicator from top to bottom. Front Panel Indicators
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 43 Table 25 lists possible status of the RUN and ALM indicators, and Table 26 lists possible status of the M/S indicator. T ABLE 25. DESCRIPTIONS OF RUN AND ALM I NDICATORS RUN Status ALM Status Meaning Flickers at 1 Hz periodically Constantly off Running normally Flickers at 1 Hz periodically Constantly on Flickers at 1 Hz periodically Flickers at 1 Hz periodically Constantly on Flickers at 5 Hz periodically Constantly on Flickers at 1 Hz periodically Flickers at 5 Hz periodically Flickers at 5 Hz periodically Flickers at 5 Hz periodically Flickers at 1 Hz periodically Flickers at 5 Hz periodically Constantly on Fault or alarm occurs during running T ABLE 26. DESCRIPTION OF THE M/S I NDICATOR ON THE SC B OARD M/S Status Meaning Flickers at 5 Hz periodically Fast capture mode Flickers at 1 Hz periodically Tracing mode Flickers at 0.5 Hz periodically Free-oscillation mode Constantly on Hold mode Constantly off Standby mode Refer to the Overview section of SC Unit. SCI Board SCI board provides SC board with four channels of external reference clock outputs, and four channels of external reference clock inputs. The first channel of 2.048 Mbit/s output and the first channel of 2.048 MHz output originate from the same clock source, while the second channel of 2.048 Mbit/s output and the second channel of 2.048 MHz output originate from the same clock source. At present, the 75 Ω SCI board is provided. The board provides two pairs each for 2.048 Mbit/s and 2.048 MHz coaxial input/output interfaces of 75 Ω (wiring out via eight coaxial connectors). Position in Subrack Functions
ZXMP S330 (V1.3) Hardware Descriptions 44 Confidential and Proprietary Information of ZTE CORPORATION At the external clock input side: SCI board sends the received 2.048 Mbit/s and 2.048 MHz clock signals to the motherboard, and the motherboard sends the clock signals to SC board for processing. At the external clock output side: through the motherboard, SCI board receives the 2.048 Mbit/s and 2.048 MHz clock signals processed by SC board, and then sends the clock signals to external equipment. The 75 Ω SCI board has no front panel. Its interfaces are illustrated in Figure 28. FIGURE 28. 75 Ω SCI B OARD 1. INB1 2. OUTB1 3. INB2 4. OUTB2 5. INH1 6. OUTH1 7. INH2 8. OUTH2 The interfaces of SCI board employ the 1.0/2.3 bended PCB welded (with screws attached) socket (female). Table 27 lists the definition of each interface. T ABLE 27. DESCRIPTION OF I NTERFACES ON 75 Ω SCI BOARD Interface S.N. Interface ID Definition 1 INB1 The first channel of 2 Mbit/s synchronous clock input interface 2 OUTB1 The first channel of 2 Mbit/s synchronous clock output interface 3 INB2 The second channel of 2 Mbit/s synchronous clock input interface 4 OUTB2 The second channel of 2 Mbit/s synchronous clock output interface Working Principle Interfaces
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 45 Interface S.N. Interface ID Definition 5 INH1 The first channel of 2 MHz synchronous clock input interface 6 OUTH1 The first channel of 2 MHz synchronous clock output interface 7 INH2 The second channel of 2 MHz synchronous clock input interface 8 OUTH2 The second channel of 2 MHz synchronous clock output interface Note: The serial number of interface in the table is illustrated in Figure 28. Position in Refer to the Overview section of SC Unit. Subrack
ZXMP S330 (V1.3) Hardware Descriptions 46 Confidential and Proprietary Information of ZTE CORPORATION CS Board CS board cross-connects the traffic of ZXMP S330. Implements the service interworking among multiple directions and provides to the external a traffic access capacity of 88 VC-4s. Completes multiplex section APS protection switching. Monitors the alarm information of AUs in all directions and implements path protection switching. Monitors the state of all service boards and implements the 1:N (N≤5) board protection. Can insert the AU-AIS signal or unequipped VC-4 data to the un-configured service. Can overlap 2 M traffic, namely, combine the traffic of multiple 2 M electrical service boards into a group of AU-4 signals. Supports 1+1 backup. There are two kinds of CS boards with different versions: CSA and CSB, which have different higher-order and lowerorder cross-connect capacities, as listed in Table 28. T ABLE 28. CROSS- CONNECT CAPACITY OF CS B OARDS CS Board Space-division Crossconnect Capacity Time-division Cross-connect Capacity CSA 104 × 104 VC-4s 1008 × 1008 VC-12s CSB 120 × 120 VC-4s 2016 × 2016 VC-12s Note: The space-division cross-connect capacity listed in the table includes the time-division cross-connect capacity. Figure 29 illustrates the connection relations among CS board and other boards. FIGURE 29. CONNECTIONS AMONG CS B OARD AND OTHER B OARDS Functions Categories Connection Relation
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 47 The functional block diagram of CS board is shown in Figure 30. Table 29 briefly describes the functional blocks. FIGURE 30. F UNCTIONAL BLOCK DIAGRAM OF CS B OARD APS module 1:N tributary protection processing module CS board 1+1 processing module CPU unit Traffic crossconnect module Traffic bus Traffic bus Clock unit Power supply unit Control line Control line Concurrent transmitting & preferred receiving module T ABLE 29. DESCRIPTIONS OF CS B OARD F UNCTIONAL BLOCKS Functional Block Function 1:N tributary protection processing module Controls the switching of the tributary board. Clock unit Extracts the system clock and frame head from the MB, and allocates the clock required by the board itself. Traffic crossconnect module As the core of CS board, it implements the higher-order and lower-order timeslot cross-connect of service boards, and overlaps the signals of tributary boards, etc. Concurrent transmitting & preferred receiving module Completes the concurrent transmitting & preferred receiving function according to the timeslot configuration. Power supply unit Converts and allocates the –48 V power on the MB to the power of different levels required by the board itself, and supports short-circuit protection. CPU unit It is the control unit of the CS board. It supports online software download. APS module Extracts or inserts the K1 and K2 bytes. CS board 1+1 processing module Receives information from another CS board and EMS control information, and decides whether this CS board itself outputs signals. Functional Blocks
ZXMP S330 (V1.3) Hardware Descriptions 48 Confidential and Proprietary Information of ZTE CORPORATION The front panel of CS board is illustrated in Figure 31. FIGURE 31. F RONT P ANEL OF CS B OARD 1. Running status indicator (RUN) 2. Master/Standby indicator (M/S) 3. Alarm indicator (ALM) There are three indicators on the front panel, which are in turn the RUN (green) indicator, the M/S (green) indicator, and the ALM (red) indicator from top to bottom. The M/S indicator is the master/standby indicator. If this indicator is constantly ON, it indicates that the current board is in the active state; If this indicator is constantly OFF, it indicates that the current board is in the standby state. Table 30 describes possible statuses of the RUN and ALM indicators. T ABLE 30. DESCRIPTIONS OF RUN AND ALM I NDICATORS RUN Status ALM Status Meaning Flickers at 1 Hz periodically Constantly off Running normally Flickers at 1 Hz periodically Constantly on Flickers at 1 Hz periodically Flickers at 1 Hz periodically Constantly on Flickers at 5 Hz periodically Constantly on Flickers at 1 Hz periodically Flickers at 5 Hz periodically Flickers at 5 Hz periodically Flickers at 5 Hz periodically Flickers at 1 Hz periodically Flickers at 5 Hz periodically Constantly on Fault or alarm occurs during running Front Panel Indicators
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 49 The grey part in Figure 32 illustrates the positions of CS boards in ZXMP S330 subrack. FIGURE 32. POSITION OF CS B OARDS IN ZXMP S330 S UBRACK Service interface board Service interface board Service interface board Service interface board Service interface board Service interface board PWR Service interface board Service interface board Service interface board Service interface board Service interface board SCI PWR Service interface board NCPI Service board CS Service board Service board Service board Service board Service board CS Service board Service board Service board Service board Service board SC SC Service board NCP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Position in Subrack
ZXMP S330 (V1.3) Hardware Descriptions 50 Confidential and Proprietary Information of ZTE CORPORATION OL16x1 Board OL16x1 board provides one pair of STM-16 standard optical transmit/receive interfaces. Terminates and regenerates the STM-16 regenerator section overhead and multiplex section overhead. Interprets the AU-4 pointer and obtains the VC payload. Forwards EMS information from optical line board to NCP board. Outputs the received reference clock to SC board. Supports query of parameters of four optical modules: optical received power module, optical launched power module, temperature module, and laser working current module. Supports color optical interface. Supports online query of optical module type. Supports HP-TCM (Higher-order Path Tandem Connection Monitoring) function. On the border of different carriers’ networks, it can detect the number of B3 block errors received by this network, as well as the number of B3 block errors sent from this network to next network. Figure 33 illustrates the connection relations between an OL16x1 board and other boards in the system. FIGURE 33. CONNECTIONS AMONG OL16X1 B OARD AND OTHER B OARDS NCP board SC board OL16x1 board CS board Functions Connection Relations
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 51 The functional block diagram of OL16x1 board is shown in Figure 34. And Table 31 briefly describes the functional blocks. FIGURE 34. F UNCTIONAL BLOCK DIAGRAM OF OL16X1 B OARD Multiplexing/ Demultiplexing unit 2.5 G optical transmit interface Monitoring unit NCP board CS, SC boards Traffic processing unit Control unit Optical module 2.5 G optical receive interface T ABLE 31. F UNCTIONAL BLOCKS OF OL16X1 B OARD Functional Block Function Optical module The optical module unit consists of a 2.5 G optical receive interface and a 2.5 G optical transmit interface. The 2.5 G optical receive interface converts 2.5 G highspeed optical signal into electrical signal. It can also monitor the optical received power. The 2.5 G optical transmit interface converts electrical signal into 2.5 G high-speed optical signal. It can also shut down the laser; monitor the optical launched power and the laser working current. Multiplexing /Demultiplexing unit Extracts clock at the receive direction, multiplies frequency of clock at the transmit direction, demultiplexes data at the receive direction, and multiplexes data at the transmit direction. Control unit Provides interfaces and channels via which it can communicate with NCP board to perform such functions as performance statistics, alarm detection, temperature control, status setting, and inter-board communications. Traffic processing unit Separates payload from overhead, and combines payload with overhead. Extracts and inserts section overhead (SOH). Processes pointers, alarms, and ECC forwarding; implements bit error statistics. Monitoring unit Performs various monitoring functions, such as temperature detection. Functional Blocks
ZXMP S330 (V1.3) Hardware Descriptions 52 Confidential and Proprietary Information of ZTE CORPORATION The front panel of OL16x1 board is illustrated in Figure 35. FIGURE 35. F RONT P ANEL OF OL16X1 BOARD 1. Running status indicator (RUN) 2. Work indicator (M/S) 3. Alarm indicator (ALM) 4. Optical transmit interface and receive interface (TX, RX) 5. Laser warning sign 6. Laser level sign There are three indicators on the front panel, which are in turn the RUN (green) indicator, the M/S (green) indicator, and the ALM (red) indicator from top to bottom. The RUN indicator flickers slowly and regularly if the board is running normally. The M/S indicator is ON if the board is running normally. The ALM indicator is OFF if the board has no alarm; otherwise, it is ON. OL16x1 board provides one optical receive interface (RX) and one optical transmit interface (TX). They receive or transmit STM-16 optical signals. Their connectors are both LC/PC type. The laser warning sign warns the operator not to look straight at optical interface when plugging/unplugging fiber pigtail, lest eyes would be hurt. Front Panel Indicators Interfaces and Signs
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 53 The laser level sign marks the laser level. The grey part in Figure 36 illustrates the position of OL16x1 board in ZXMP S330 subrack. FIGURE 36. POSITION OF OL16X1 B OARD IN S UBRACK Service interface board Service interface board Service interface board Service interface board Service interface board Service interface board PWR Service interface board Service interface board Service interface board Service interface board Service interface board SCI PWR Service interface board NCPI Service board CS Service board Service board Service board Service board Service board CS Service board Service board Service board Service board Service board SC SC Service board NCP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Position in Subrack
ZXMP S330 (V1.3) Hardware Descriptions 54 Confidential and Proprietary Information of ZTE CORPORATION OL1/4x4 Board OL1/4x4 board can process four channels of STM-1 or STM-4 optical signals. User can set the number of optical interfaces to be 1, 2, 3, or 4 as per the actual requirements. OL1/4x4 board supports the following three work modes: OL1 mode: rates of all the optical interfaces are STM-1. OL4 mode: rates of all the optical interfaces are STM-4. OL1/4 mode: rates of some optical interfaces are STM-1, and rates of other optical interfaces are STM-4. OL1/4x4 board processes STM-1/4 optical signals. Its interface types are LC/PC. It supports bidirectional fiber. Implements conversion between optical and electrical signals. Forwards EMS information from optical line board to NCP board. Outputs the received reference clock to SC board. Supports query of parameters of four optical modules: optical received power module, optical launched power module, temperature module, and laser working current module. Supports online query of optical module type. Supports HP-TCM (Higher-order Path Tandem Connection Monitoring) function. On the border of different carriers’ networks, it can detect the number of B3 block errors received by this network, as well as the number of B3 block errors sent from this network to next network. Figure 37 illustrates the connection relations between an OL1/4x4 board and other boards in the system. FIGURE 37. CONNECTIONS AMONG OL1/4X4 B OARD AND OTHER B OARDS NCP board SC board OL1/4x4 board CS board Overview Functions Connection Relations
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 55 The functional block diagram of OL1/4x4 board is shown in Figure 38. And Table 32 briefly describes the functional blocks. FIGURE 38. F UNCTIONAL BLOCK DIAGRAM OF OL1/4X4 B OARD Multiplexing/ Demultiplexing unit 622 M/155 M optical transmit interface Monitoring unit NCP board CS, SC boards Traffic processing unit Control unit Optical module 622 M/155 M optical receive interface T ABLE 32. F UNCTIONAL BLOCKS OF OL1/4X4 B OARD Functional Block Function Optical module The optical module unit consists of a 622 M/155 M optical receive interface and a 622 M/155 M optical transmit interface. The 622 M/155 M optical receive interface converts 622 M/155 M high-speed optical signal into electrical signal. It can also monitor the optical received power. The 622 M/155 M optical transmit interface converts electrical signal into 622 M/155 M high-speed optical signal. It can also shut down the laser; monitor the optical launched power and the laser working current. Multiplexing /Demultiplexing unit Extracts clock at the receive direction, multiplies frequency of clock at the transmit direction, demultiplexes data at the receive direction, and multiplexes data at the transmit direction. Control unit Provides interfaces and channels via which it can communicate with NCP board to perform such functions as performance statistics, alarm detection, temperature control, status setting, and inter-board communications. Traffic processing unit Separates payload from overhead, and combines payload with overhead. Extracts and inserts section overhead (SOH). Processes pointers, alarms, and ECC forwarding; implements bit error statistics. Monitoring unit Performs various monitoring functions, such as temperature detection. Functional Blocks
ZXMP S330 (V1.3) Hardware Descriptions 56 Confidential and Proprietary Information of ZTE CORPORATION The front panel of OL1/4x4 board is illustrated in Figure 39. FIGURE 39. F RONT P ANEL OF OL1/4X4 B OARD 1. Running status indicator (RUN) 2. Work indicator (M/S) 3. Alarm indicator (ALM) 4. Optical transmit interfaces and receive interfaces (TX, RX) 5. Laser warning sign 6. Laser level sign There are three indicators on the front panel, which are in turn the RUN (green) indicator, the M/S (green) indicator, and the ALM (red) indicator from top to bottom. The RUN indicator flickers slowly and regularly if the board is running normally. The M/S indicator is ON if the board is running normally. The ALM indicator is OFF if the board has no alarm; otherwise, it is ON. Front Panel Indicators
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 57 OL1/4x4 board provides four optical receive interfaces (RXn, n=1, 2, 3, 4) and four optical transmit interfaces (TXn, n=1, 2, 3, 4). They receive or transmit STM-1 or STM-4 optical signals. Their connectors are all LC/PC type. The laser warning sign warns the operator not to look straight at optical interface when plugging/unplugging fiber pigtail, lest eyes would be hurt. The laser level sign marks the laser level. The grey part in Figure 40 illustrates the position of OL1/4x4 board in ZXMP S330 subrack. FIGURE 40. POSITION OF OL1/4X4 B OARD IN S UBRACK Service interface board Service interface board Service interface board Service interface board Service interface board Service interface board PWR Service interface board Service interface board Service interface board Service interface board Service interface board SCI PWR Service interface board NCPI Service board CS Service board Service board Service board Service board Service board CS Service board Service board Service board Service board Service board SC SC Service board NCP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 T ABLE 33. DESCRIPTIONS OF OL1/4X4 BOARD P OSITIONS IN ZXMP S330 S UBRACK Slot No. Description Lower-layer service board slots 1, 2, 15, 16 OL1/4x4 board inserted in these slots can only work in OL1 mode. And the 3rd and 4th optical interface pairs can only work for regenerator, not for adding/dropping traffic. Lower-layer service board slots 3, 4, 13, 14 OL1/4x4 board inserted in these slots can work in either OL1 mode or OL4 mode. When working in OL4 mode, the 2nd, 3rd and 4th optical interface pairs can only work for regenerator, not for adding/dropping traffic. Lower layer service board slots 5, 6, 11, 12 OL1/4x4 board inserted in these slots can work in OL1 mode, OL4 mode, or OL1/OL4 mode. Note: If all the optical interfaces of OL1/4x4 board work for regenerator, this OL1/4x4 board can be inserted in any lower-layer service board slot. Interfaces and Signs Position in Subrack
ZXMP S330 (V1.3) Hardware Descriptions 58 Confidential and Proprietary Information of ZTE CORPORATION OL1/4 Subsystem Overview Processes STM-1 or STM-4 optical traffic, and STM-1 electrical traffic. Provides 1:N (N≤5) protection for the boards that process STM-1 electrical traffic. The OL1/4 subsystem comprises the following boards: LP1x1, LP1x2, LP4x1, LP4x2, OIS1x1, OIS1x2, OIS4x1, OIS4x2, ESS1x2, BIS1 Table 34 illustrates different board combinations that implement different functions. T ABLE 34. B OARD C OMBINATIONS IN OL1/4 S UBSYSTEM Function Boards Involved Process STM-1 optical traffic LP1x1 (or LP1x2), OIS1x1 (or OIS1x2) Process STM-1 electrical traffic LP1x1 (or LP1x2), ESS1x2 Provide 1:N (N≤5) protection for the board processing STM-1 electrical traffic LP1x1 (or LP1x2), ESS1x2, BIS1 Process STM-4 optical traffic LP4x1 (or LP4x2), OIS4x1 (or OIS4x2) Note: ZXMP S330 can support at most two groups of 1:N (N≤5) protection for the boards that process STM-1 electrical traffic. Subsystem Functions Composition
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 59 The grey part in Figure 41 illustrates the positions of boards in OL1/4 subsystem. FIGURE 41. POSITIONS OF B OARDS IN OL1/4 S UBSYSTEM Service interface board Service interface board Service interface board Service interface board Service interface board Service interface board PWR Service interface board Service interface board Service interface board Service interface board Service interface board SCI PWR Service interface board NCPI Service board CS Service board Service board Service board Service board Service board CS Service board Service board Service board Service board Service board SC SC Service board NCP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Table 35 describes the available slots for each board. T ABLE 35. AVAILABLE SLOTS OF B OARDS IN OL1/4 S UBSYSTEM Board ID Available Slots Remarks LP1x1, LP1x2 Lower-layer service board slots 1 to 6 and slots 11 to 16 The protection board can only be inserted in slot 1 and slot 16. LP4x1, LP4x2 Lower-layer service board slots 3 to 6 and slots 11 to 14 When LP4x2 board is inserted in slot 3, 4, 13, or 14, its 2nd optical interface pair can only work for regenerator, not for adding/dropping traffic. BIS1 Upper-layer service interface board slot 1 and slot 16. It is used when the 1:N (N≤5) protection is required for the boards that process STM-1 electrical traffic. OIS1x1, OIS1x2 Upper-layer service interface board slots 1 to 6 and slots 11 to 16 - ESS1x2 Upper-layer service interface board slots 1 to 6 and slots 11 to 16 - OIS4x1, OIS4x2 Upper-layer service interface board slots 3 to 6 and slots 11 to 14 OIS4x1 board works with LP4x1 board. OIS4x2 board works with LP4x2 board. Position in Subrack
ZXMP S330 (V1.3) Hardware Descriptions 60 Confidential and Proprietary Information of ZTE CORPORATION Figure 42 illustrates the connection relations among the boards in OL1/4 subsystem. FIGURE 42. CONNECTION RELATIONS AMONG THE B OARDS IN OL1/4 S UBSYSTEM Service board CS board SC board NCP board Received clock reference System clock and frame head Interface board Switching board Note: Interface boards include: OIS1x1, OIS1x2, OIS4x1, and OIS4x2. Switching board is ESS1x2. Service boards include: LP1x1, LP1x2, LP4x1, and LP4x2. Explanations The interface board and the service board are connected via STM-1/4 electrical signals. The service board is connected to the CS board via a bus. The service board converts the STM-1/4 data got from the interface board into a bus and then sends the data to the CS board. And the service board also obtains the bus data sent by the CS board, processes the data, and then sends the data to the interface board. The service board exchanges the DCC information on the line with the NCP board, and provides overhead bytes for the orderwire part of the NCP. The SC board provides the service board with the system clock and the system frame head. The service board divides the frequency of the received clock, and then sends it to the SC board as one of the reference clocks. Connection Relations
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 61 LP1x1/LP1x2 Boards These two boards are line processor boards. LP1x1 or LP1x2 performs the following functions: LP1x1 board processes one channel of STM-1 traffic. LP1x2 board processes two channels of STM-1 traffic. Forwards EMS information from optical line board to NCP board, and outputs the received reference clock to the SC board. Works with ESS1x2 board to process STM-1 electrical traffic. Works with ESS1x2 board and BIS1 board to implement 1:N (N≤5) protection for the boards that process STM-1 electrical traffic. Works with OIS1x1 or OIS1x2 board to process STM-1 optical traffic. Figure 43 shows the functional blocks of LP1x1/LP1x2 boards. FIGURE 43. F UNCTIONAL BLOCK DIAGRAM OF LP1X1/LP1X2 B OARDS Multiplexing /Demultiplexing unit OIS1x1/OIS1x2/ ESS1x2 board Monitoring unit NCP board Traffic processing unit Control unit CS board Table 36 describes the functions of each functional block. T ABLE 36. DESCRIPTION OF LP1X1/LP1X2 B OARD F UNCTIONAL BLOCKS Functional Block Function Multiplexing/ Demultiplexing unit Extracts clock at the receive direction, multiplies frequency of clock at the transmit direction, demultiplexes data at the receive direction, and multiplexes data at the transmit direction. Control unit Provides interfaces and channels via which it can communicate with NCP board to perform such functions as performance statistics, alarm detection, temperature control, status setting, and inter-board communications. Functions Functional Blocks
ZXMP S330 (V1.3) Hardware Descriptions 62 Confidential and Proprietary Information of ZTE CORPORATION Functional Block Function Traffic processing unit Separates payload from overhead, and combines payload with overhead. Extracts and inserts section overhead (SOH). Processes pointers, alarms, and ECC forwarding; implements bit error statistics. Decodes various codes. Outputs AU-AIS at the corresponding optical interface according to the VC-4 level alarm indication. Monitoring unit Detects if optical interface receives optical signal. The front panels of LP1x1 and LP1x2 boards are identical, as shown in Figure 44. FIGURE 44. LP1X1/LP1X2 B OARD F RONT P ANEL 1. Running status indicator (RUN) 2. Master/standby indicator (M/S) 3. Alarm Indicator (ALM) There are three indicators on the front panel, which are in turn the RUN (green) indicator, the M/S (green) indicator, and the ALM (red) indicator from top to bottom. M/S indicator is ON if the board is in active status; it is OFF if the board is in standby status. Front Panel Indicators
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 63 Table 37 lists possible status of the RUN and ALM indicators. T ABLE 37. DESCRIPTIONS OF RUN AND ALM I NDICATORS RUN Status ALM Status Meaning Flickers at 1 Hz periodically Constantly off Running normally Flickers at 1 Hz periodically Constantly on Flickers at 1 Hz periodically Flickers at 1 Hz periodically Constantly on Flickers at 5 Hz periodically Constantly on Flickers at 1 Hz periodically Flickers at 5 Hz periodically Flickers at 5 Hz periodically Flickers at 5 Hz periodically Flickers at 1 Hz periodically Flickers at 5 Hz periodically Constantly on Fault or alarm occurs during running None Refer to the Overview section of OL1/4 subsystem. LP4x1/LP4x2 Boards These two boards are line processor boards. LP4x1 or LP4x2 performs the following functions: LP4x1 board processes one channel of STM-4 traffic. LP4x2 board processes two channels of STM-4 traffic. Forwards EMS information from optical line board to NCP board, and outputs the received reference clock to the SC board. Works with OIS4x1 or OIS4x2 board to process STM-4 optical traffic. Interface Position in Subrack Functions
ZXMP S330 (V1.3) Hardware Descriptions 64 Confidential and Proprietary Information of ZTE CORPORATION Figure 45 shows the functional blocks of LP4x1/LP4x2 boards. FIGURE 45. F UNCTIONAL BLOCK DIAGRAM OF LP4X1/LP4X2 B OARDS Multiplexing /Demultiplexing unit OIS4x1/OIS4x2 board Monitoring unit NCP board Traffic processing unit Control unit CS board Table 38 describes the functions of each functional block. T ABLE 38. DESCRIPTION OF LP4X1/LP4X2 B OARD F UNCTIONAL BLOCKS Functional Block Function Multiplexing/ Demultiplexing unit Extracts clock at the receive direction, multiplies frequency of clock at the transmit direction, demultiplexes data at the receive direction, and multiplexes data at the transmit direction. Control unit Provides interfaces and channels via which it can communicate with NCP board to perform such functions as performance statistics, alarm detection, temperature control, status setting, and inter-board communications. Traffic processing unit Separates payload from overhead, and combines payload with overhead. Extracts and inserts section overhead (SOH). Processes pointers, alarms, and ECC forwarding; implements bit error statistics. Decodes various codes. Outputs AU-AIS at the corresponding optical interface according to the VC-4 level alarm indication. Monitoring unit Detects if optical interface receives optical signal. Functional Blocks
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 65 The front panels of LP4x1 and LP4x2 boards are identical, as shown in Figure 46. FIGURE 46. LP4X1/LP4X2 B OARD F RONT P ANEL 1. Running status indicator (RUN) 2. Master/standby indicator (M/S) 3. Alarm Indicator (ALM) There are three indicators on the front panel, which are in turn the RUN (green) indicator, the M/S (green) indicator, and the ALM (red) indicator from top to bottom. M/S indicator is ON if the board is in active status; it is OFF if the board is in standby status. Table 43 lists possible status of the RUN and ALM indicators. T ABLE 39. DESCRIPTIONS OF RUN AND ALM I NDICATORS RUN Status ALM Status Meaning Flickers at 1 Hz periodically Constantly off Running normally Flickers at 1 Hz periodically Constantly on Flickers at 1 Hz periodically Flickers at 1 Hz periodically Constantly on Flickers at 5 Hz periodically Constantly on Flickers at 1 Hz periodically Flickers at 5 Hz periodically Flickers at 5 Hz periodically Flickers at 5 Hz periodically Flickers at 1 Hz periodically Flickers at 5 Hz periodically Constantly on Fault or alarm occurs during running None Front Panel Indicators Interface
ZXMP S330 (V1.3) Hardware Descriptions 66 Confidential and Proprietary Information of ZTE CORPORATION Refer to the Overview section of OL1/4 subsystem. OIS1x1/OIS1x2/OIS4x1/OIS4x2 Boards These boards are optical interface boards. OIS1x1 board provides LP1x1 board with one STM-1 optical receive interface and one STM-1 optical transmit interface. OIS1x2 board provides LP1x2 board with two STM-1 optical receive interfaces and two STM-1 optical transmit interfaces. OIS4x1 board provides LP4x1 board with one STM-4 optical receive interface and one STM-4 optical transmit interface. OIS4x2 board provides LP4x2 board with two STM-4 optical receive interfaces and two STM-4 optical transmit interfaces. The optical transmit interfaces of these boards can shut down laser. These boards have the same working principle: At the receive side, the board receives optical signal inputted from the outside. Then it converts the 622 Mbit/s or 155 Mbit/s high-speed optical signal into electrical signal, and informs the service board about optical signal loss at the receive side. Finally, it sends the processed electrical signal to line processor board via motherboard for further processing. At the transmit side, the board receives electrical signal sent by line processor board via the motherboard. Then, it converts the electrical signal into 622 Mbit/s or 155 Mbit/s optical signal. In addition, it controls the laser shutdown. Finally, it transmits the optical signal to the outside. None None OIS1x2 and OIS4x2 boards provide two optical interface pairs with the connector type of SC/PC, as shown in Figure 47. The OIS1x1 and OIS4x1 boards have the similar structure as the OIS1x2 and OIS4x2 boards, except that the OIS1x1 or OIS4x1 board only provides one optical interface pair. Position in Subrack Functions Working Principle Front Panel Indicator Interfaces
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 67 FIGURE 47. OIS1X2/OIS4X2 B OARD I NTERFACES 1. Optical transmit interface 1 2. Optical receive interface 1 3. Optical transmit interface 2 4. Optical receive interface 2 Position in Refer to the Overview section of OL1/4 subsystem. Subrack
ZXMP S330 (V1.3) Hardware Descriptions 68 Confidential and Proprietary Information of ZTE CORPORATION ESS1x2 Board ESS1x2 board is the interface switching board. It has the following functions: Provides LP1x1/LP1x2 board with two STM-1 electrical receive interfaces and two STM-1 electrical transmit interfaces. When 1:N (N≤5) protection for LP1x1/LP1x2 board is not required, the ESS1x2 board only performs STM-1 electrical interface function. When 1:N (N≤5) protection for LP1x1/LP1x2 board is required, ESS1x2 board works with BIS1 board to implement 1:N (N≤5) protection for LP1x1/LP1x2 board. At the receive side, ESS1x2 board receives the 155 Mbit/s electrical signal from the outside. Then it processes the electrical signal and sends it to LP1x1/LP1x2 board via the motherboard for further processing. At the transmit side, ESS1x2 board receives the 155 Mbit/s electrical signal sent by LP1x1/LP1x2 board via the motherboard. It processes the electrical signal, and then sends the signal to the outside. In the case of 1:N (N≤5) protection for LP1x1/LP1x2 board, ESS1x2 board decides whether to send the electrical signal to the working LP1x1/LP1x2 board or to the protection LP1x1/LP1x2 board according to the control signal from the CS board. None None Functions Working Principle Front Panel Indicator
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 69 ESS1x2 board provides two electrical interfaces pairs, which use 1.0/2.3 bended PCB welded (with screws attached) sockets (female), as shown in Figure 48. FIGURE 48. ESS1X2 B OARD I NTERFACES 1. Electrical receive interface 1 2. Electrical transmit interface 1 3. Electrical receive interface 2 4. Electrical transmit interface 2 Refer to the Overview section of the OL1/4 subsystem. BIS1 Board BIS1 board is a bridge interface board. It has the following functions: Used only when the 1:N protection for LP1x1/LP1x2 board is required, and inserted in the service interface board slot corresponding to the protection LP1x1/LP1x2 board. According to the protection control signal from CS board, BIS1 board functions as a bridge between the protection LP1x1/LP1x2 board and the ESS1x2 board which corresponds to the faulty LP1x1/LP1x2 board. When fault occurs to a working LP1x1/LP1x2 board, according to the control signal sent by CS board, BIS1 board bridges the signals sent/received by the ESS1x2 board which corresponds to the faulty LP1x1/LP1x2 board to the protection LP1x1/LP1x2 board for processing. None None None Refer to the Overview section of the OL1/4 subsystem. Interfaces Position in Subrack Functions Working Principle Front Panel Indicator Interface Position in Subrack
ZXMP S330 (V1.3) Hardware Descriptions 70 Confidential and Proprietary Information of ZTE CORPORATION Subsystem Configuration Example Figure 49 shows a configuration example of OL1/4 subsystem. With this configuration, the subsystem can process STM-1 electrical traffic. It can provide one group of 1:3 protection for LP1x1 boards. The LP1x1 board in slot 1 is the protection board; and the LP1x1 boards in slots 2, 3, and 4 are working boards. FIGURE 49. CONFIGURATION EXAMPLE OF OL1/4 S UBSYSTEM BIS1 1 E S S 1 x 2 2 3 4 5 6 SCI PWR PWR 11 12 13 14 15 16 NCPI E S S 1 x 2 7 8 9 10 17 E S S 1 x 2 Fan plug-in box 1 2 3 4 5 SC CS CS 11 12 13 14 15 16 SC NCP 6 7 8 9 10 17 L P 4 x 1 L P 4 x 1 L P 1 x 1 O I S 4 x 1 O I S 4 x 1 O I S 1 x 1 L P 4 x 1 L P 4 x 1 L P 1 x 1 L P 1 x 1 L P 1 x 1 L P 1 x 1 O I S 4 x 1 O I S 4 x 1
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 71 OA Board OA board amplifies one channel of optical signal. Its amplification function is independent of optical signal rate. By amplifying the optical power of light with 1550 nm wavelength, OA board can improve the non-regenerator transmission distance and provide transparent transmission channel for optical signals. The data rate can be 2.5 Gbit/s, 622 Mbit/s, or 155 Mbit/s. OA board supports query of four kinds of parameters: optical launched power, optical received power, module temperature, and laser working current. Figure 50 shows the connection relations among OA board and other optical line boards. The east optical line board sends optical signals to the OA board. The OA board receives the signals, then amplifies the optical signals, and sends them to the west optical line board. Finally, the west optical line board receives the amplified optical signals. FIGURE 50. CONNECTION RELATIONS AMONG O A B OARD AND OTHER B OARDS The full name of EDFA is Erbium Doped Fiber Amplifier. It is the core part of OA board. If an ordinary optical fiber is doped with some other element such as erbium or praseodymium, it would be able to amplify the laser at a certain waveband. At the heart of the EDFA, the fiber is doped with erbium, a rare earth element that happens to have the appropriate energy levels in its atomic structure for amplifying light at 1550 nm. When light at 1550 nm travels through the erbium doped fiber, it causes stimulated emission. In this way, the 1550 nm optical input signal gains strength. Functions Connection Relations EDFA
ZXMP S330 (V1.3) Hardware Descriptions 72 Confidential and Proprietary Information of ZTE CORPORATION The basic components of EDFA include the gain medium (erbium doped fiber of various types), pump source, optical passive components (optical isolator, optical multiplexer, optical demultiplexer, optical fiber connector), control unit and control interface. Among which the optical isolator prevents reverse light from influencing the EDFA; the optical fiber connector facilitates the connections among EDFA, communication system, and optical lines; the optical coupler separates part of signals from the input and output optical lines, and sends these signals to the optical monitor. In practice, EDFA is classified into Optical Booster Amplifier (OBA), Optical Pre-Amplifier (OPA), or Optical Line Amplifier (OLA) according to the position and effect of EDFA. OBA locates at the transmitting end of the system. It boosts the optical launched power of the system, and extends the distance of the regenerator. OPA locates at the receiving end of the system. It amplifies the weak transmitted signals, and boosts the input power of the system receiver. OLA locates in the middle of the optical fiber line of the system. It replaces the optical regenerator. The ZXMP S330 of version 1.3 provides OBA board. Figure 51 shows the functional block diagram of OA board. Table 40 describes each functional block. FIGURE 51. F UNCTIONAL BLOCK DIAGRAM OF O A B OARD Control unit Optical amplification unit Initialization and query unit Input optical signal Output optical signal NCP Functional Blocks
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 73 T ABLE 40. DESCRIPTION OF O A B OARD F UNCTIONAL BLOCKS Functional Block Function Optical amplification unit Amplifies the power of input optical signal at the 1550 nm working window. Control unit Controls the optical amplification unit. Monitors and reports alarms and performance events of OA board. Initialization and query unit Initializes the optical amplification unit. Communicates with the optical amplification unit at real time. Queries performance and sets parameters of the optical amplification unit. Figure 52 shows the front panel of OBA board. FIGURE 52. F RONT P ANEL OF OBA B OARD 1. Running status indicator (RUN) 2. Work indicator (M/S) 3. Alarm indicator (ALM) 4. Optical transmit interface and receive interface (TX, RX) 5. Laser warning sign 6. Laser level sign Front Panel Indicators
ZXMP S330 (V1.3) Hardware Descriptions 74 Confidential and Proprietary Information of ZTE CORPORATION There are three indicators on the front panel, which are in turn the RUN (green) indicator, the M/S (green) indicator, and the ALM (red) indicator from top to bottom. The RUN indicator flickers slowly and regularly if the board is running normally. The M/S indicator is ON if the board is running normally. The ALM indicator is OFF if the board has no alarm; otherwise, it is ON. OBA board provides one optical receive interface (RX) and one optical transmit interfaces (TX). Their connectors are both LC/PC type. The laser warning sign warns the operator not to look straight at optical interface when plugging/unplugging fiber pigtail, lest eyes would be hurt. The laser level sign marks the laser level. OA board can be inserted in any service board slot in ZXMP S330 subrack, i.e., any slot of slot 1 to slot 6, and slot 11 to slot 16. The grey part in Figure 53 shows the available slots of OA board. FIGURE 53. AVAILABLE SLOTS OF OA B OARD Service interface board Service interface board Service interface board Service interface board Service interface board Service interface board PWR Service interface board Service interface board Service interface board Service interface board Service interface board SCI PWR Service interface board NCPI Service board CS Service board Service board Service board Service board Service board CS Service board Service board Service board Service board Service board SC SC Service board NCP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Interfaces and Signs Position in Subrack
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 75 EP1 Subsystem Overview Maps/demaps PDH E1/T1 electrical signals. Provides 1:N (N≤5) protection for E1/T1 tributary boards. The EP1 subsystem comprises EPE1x21, EPT1x21, EPE1B, BIE1x21, and ESE1x21 boards. Different board combinations can implement different functions, as listed in Table 41. T ABLE 41. C OMBINATIONS OF B OARDS IN EP1 S UBSYSTEM Function Boards Involved Process E1 electrical signal EPE1x21 (or EPE1B) and ESE1x21 Provide 1:N (N≤5) protection for E1 tributary board EPE1x21 (or EPE1B), BIE1x21, and ESE1x21 Process T1 electrical signal EPT1x21 (or EPE1B) and ESE1x21 Provide 1:N (N≤5) protection for T1 tributary board EPT1x21 (or EPE1B), BIE1x21, and ESE1x21 Note: ZXMP S330 supports at most two groups of 1:N (N≤5) protection for E1/T1 tributary boards. The grey part in Figure 54 shows the positions of boards in EP1 subsystem. Table 42 lists the available slots for the boards. FIGURE 54. POSITIONS OF EP1 S UBSYSTEM BOARDS Service interface board Service interface board Service interface board Service interface board Service interface board Service interface board PWR Service interface board Service interface board Service interface board Service interface board Service interface board SCI PWR Service interface board NCPI Service board CS Service board Service board Service board Service board Service board CS Service board Service board Service board Service board Service board SC SC Service board NCP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Subsystem Functions Composition Position in Subrack
ZXMP S330 (V1.3) Hardware Descriptions 76 Confidential and Proprietary Information of ZTE CORPORATION T ABLE 42. AVAILABLE SLOTS OF B OARDS IN EP1 S UBSYSTEM Board ID Available Slots Remarks EPE1x21, EPT1x21, EPE1B Lower-layer service board slots 1 to 6 and slots 11 to 16 The protection board can be inserted in any slot of lowerlayer service board slots 1 to 6 and slots 11 to 16. ESE1x21 Upper-layer service interface board slots 1 to 6 and slots 11 to 16. - BIS1 Upper-layer service interface board slots 1 to 6 and slots 11 to 16. It is used when the 1:N (N≤5) protection is required for E1/T1 tributary board. It is inserted in the service interface board slot corresponding to the protection tributary board. EPE1x21/EPT1x21/EPE1B Boards These boards are E1/T1 (electrical) tributary boards. Their functions are described below: EPE1x21 can process up to 21 channels of E1 traffic. EPT1x21 can process up to 21 channels of T1 traffic. EPE1B can process up to 21 channels of E1 or T1 traffic. The timeslots used to add traffic and the timeslots used to drop traffic can be different. Supports “concurrent transmitting and preferred receiving”. "Preferred receiving" is implemented by detecting alarm and performance data in different timeslots, and then selecting the relatively normal timeslots for demapping. "Concurrent transmitting" is implemented by sending data to different AU bus timeslots concurrently. Extracts and inserts path overheads. For each board, four tributaries support tributary retiming, and four tributaries support clock extraction from tributary. Works with BIE1x21 and ESE1x21 boards to implement the 1:N (N≤5) protection for tributary board. ZXMP S330 supports at most two groups of 1:5 protection for EPE1x21/EPT1x21/EPE1B boards. Besides the above functions, EPE1B board supports the unframing and framing methods: f Unframing method: The board only detects LOS alarm, AIS alarm, and CV performance count at E1/T1 interface. Functions
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 77 f Framing method: Besides all the information detected in the unframing method, the board also detects the LOF/RAI framing alarm of received E1/T1 signal, and displays them on the EMS. User can judge whether fault is caused by transmission equipment or by terminal equipment according to the EMS framing alarm information. The EPE1x21, EPT1x21, and EPE1B boards have the same functional blocks, which are shown in Figure 55. Table 43 describes the functional blocks. FIGURE 55. F UNCTIONAL BLOCK DIAGRAM OF EPE1X21/EPT1X21/EPE1B B OARDS Traffic processing unit Clock unit E1/T1 tributary traffic System clock, frame head Tributary clock Control unit Power supply unit NCP board CS board T ABLE 43. DESCRIPTION OF EPE1X21/EPT1X21/EPE1B B OARD F UNCTIONAL BLOCKS Functional Block Functions Traffic processing unit Maps tributary traffic to the corresponding AU timeslot, and extracts tributary traffic from the corresponding AU timeslot. Implements the path protection for tributary traffic. Extracts/inserts path overheads. Clock unit Allocates the system clock to the clock required by the board itself. Implements tributary retiming and clock extraction from tributary. Notifies the CS board of a clock alarm. Control unit Provides interfaces and channels to communicate with the NCP board. Implements performance statistics, alarm detection, status setting, and communication between boards. Supports online upgrade of the board software. Functional Blocks
ZXMP S330 (V1.3) Hardware Descriptions 78 Confidential and Proprietary Information of ZTE CORPORATION Functional Block Functions Power supply unit Filters and allocates the power required by the board itself. The front panels of the EPE1x21, EPT1x21, and EPE1B boards are similar, as shown in Figure 56. FIGURE 56. F RONT P ANEL OF EPE1X21/EPT1X21/EPE1B B OARD 1. Running status indicator (RUN) 2. Master/standby indicator (M/S) 3. Alarm indicator (ALM) There are three indicators on the front panel, which are in turn the RUN (green) indicator, the M/S (green) indicator, and the ALM (red) indicator from top to bottom. M/S indicator is ON if the board is in active status; it is OFF if the board is in standby status. Table 44 lists possible status of the RUN and ALM indicators. T ABLE 44. DESCRIPTIONS OF RUN AND ALM I NDICATORS RUN Status ALM Status Meaning Flickers at 1 Hz periodically Constantly off Running normally Flickers at 1 Hz periodically Constantly on Flickers at 1 Hz periodically Flickers at 1 Hz periodically Constantly on Flickers at 5 Hz periodically Fault or alarm occurs during running Front Panel Indicators
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 79 RUN Status ALM Status Meaning Constantly on Flickers at 1 Hz periodically Flickers at 5 Hz periodically Flickers at 5 Hz periodically Flickers at 5 Hz periodically Flickers at 1 Hz periodically Flickers at 5 Hz periodically Constantly on None Refer to the Overview section of EP1 subsystem. ESE1x21 Board ESE1x21 board is the interface switching board. It has the following functions: Provides twenty-one E1/T1 electrical interface pairs. When 1:N (N≤5) protection for tributary board is needed, ESE1x21 board works with BIE1x21 board to implement the protection. When 1:N (N≤5) protection for tributary board is not needed, ESE1x21 board only provides E1/T1 electrical interfaces. At the receive side, ESE1x21 board receives the E1/T1 electrical signal from the outside, extracts the electrical signal, and then sends it to the electrical tributary board via the motherboard for processing. At the transmit side, ESE1x21 board receives the signal sent by the electrical tributary board via the motherboard, and then sends the signal to the outside. In the case of 1:N (N≤5) protection for tributary board, ESE1x21 board determines whether to send the electrical signal to the working tributary board or to the protection tributary board according to the control signal from CS board. None None Interface Position in Subrack Functions Working Principle Front Panel Indicator
ZXMP S330 (V1.3) Hardware Descriptions 80 Confidential and Proprietary Information of ZTE CORPORATION Figure 57 illustrates the ESE1x21 board interface. FIGURE 57. ESE1X21 B OARD I NTERFACE 1. Electrical interface The electrical interface employs a 50 × 2 layered 3-wall bended PCB welded flat cable socket (male). Table 45 lists the interface pin definitions. T ABLE 45. SIGNAL DEFINITIONS OF PINS ON ESE1X21 B OARD ELECTRICAL I NTERFACE Pin No. Signal Definition Pin No. Signal Definition Pin No. Signal Definition Pin No. Signal Definition 100 SR1- 75 SR1+ 50 SR13- 25 SR13+ 99 ST1- 74 ST1+ 49 ST13- 24 ST13+ 98 SR2- 73 SR2+ 48 SR14- 23 SR14+ 97 ST2- 72 ST2+ 47 ST14- 22 ST14+ 96 SR3- 71 SR3+ 46 SR15- 21 SR15+ 95 ST3- 70 ST3+ 45 ST15- 20 ST15+ 94 SR4- 69 SR4+ 44 SR16- 19 SR16+ 93 ST4- 68 ST4+ 43 ST16- 18 ST16+ 92 SR5- 67 SR5+ 42 SR17- 17 SR17+ 91 ST5- 66 ST5+ 41 ST17- 16 ST17+ 90 SR6- 65 SR6+ 40 SR18- 15 SR18+ 89 ST6- 64 ST6+ 39 ST18- 14 ST18+ 88 SR7- 63 SR7+ 38 SR19- 13 SR19+ 87 ST7- 62 ST7+ 37 ST19- 12 ST19+ Interface
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 81 Pin No. Signal Definition Pin No. Signal Definition Pin No. Signal Definition Pin No. Signal Definition 86 SR8- 61 SR8+ 36 SR20- 11 SR20+ 85 ST8- 60 ST8+ 35 ST20- 10 ST20+ 84 SR9- 59 SR9+ 34 SR21- 9 SR21+ 83 ST9- 58 ST9+ 33 ST21- 8 ST21+ 82 SR10- 57 SR10+ 32 - 7 - 81 ST10- 56 ST10+ 31 - 6 - 80 SR11- 55 SR11+ 30 - 5 - 79 ST11- 54 ST11+ 29 - 4 - 78 SR12- 53 SR12+ 28 - 3 - 77 ST12- 52 ST12+ 27 - 2 - 76 - 51 - 26 - 1 - Note: Refer to Figure 57 for the pin numberings. SRn- and SRn+ represent for the received signal of channel n, while STn- and STn+ represent for the transmitted signal of channel n. Refer to the Overview section of EP1 subsystem. BIE1x21 Board BIEx21 board is the bridge interface board. It has the following functions: Functions as a bridge between the protection tributary board and the interface switching board corresponding to the faulty tributary board. Used only when 1:N (N≤5) protection for E1/T1 tributary board is required. Is inserted in the service interface board slot corresponding to the protection tributary board. When fault occurs to a working EPE1x21/EPT1x21/EPE1B board, according to the control signal sent by CS board, BIE1x21 board bridges the signals sent/received by the ESE1x21 board which corresponds to the faulty tributary board to the protection tributary board for processing. None None None Position in Subrack Functions Working Principle Front Panel Indicator Interface
ZXMP S330 (V1.3) Hardware Descriptions 82 Confidential and Proprietary Information of ZTE CORPORATION Refer to the Overview section of EP1 subsystem. Subsystem Configuration Example Figure 58 shows a configuration example of EP1 subsystem. With this configuration, the system can process E1 electrical traffic. It can provide one group of 1:3 protection for EPE1x21 boards. The EPE1x21 board in slot 1 is the protection board; and the EPE1x21 boards in slots 2, 3, 4 are working boards. FIGURE 58. CONFIGURATION EXAMPLE OF EP1 S UBSYSTEM B I E 1 x 21 1 E S E 1 x 2 2 3 4 5 6 SCI PWR PWR 11 12 13 14 15 16 NCPI E S E 1 x 2 7 8 9 10 17 E S E 1 x 2 Fan plug-in box 1 2 3 4 5 SC CS CS 11 12 13 14 15 16 SC NCP 6 7 8 9 10 17 O L 16 x 1 E P E 1 x 21 E P E 1 x 21 E S E 1 x 21 E S E 1 x 21 O L 16 x 1 O L 16 x 1 E P E 1 x 21 E P E 1 x 21 E P E 1 x 21 E P E 1 x 21 Position in Subrack
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 83 EP3 Subsystem Overview Maps/demaps PDH E3/T3 electrical signals. Provides 1:N (N≤5) protection for E3/T3 tributary boards. Comprises EPE3x3, EPT3x3, EP3x3, ESE3x3, and BIE3x3 boards. Different board combinations can implement different functions, as listed in Table 46. T ABLE 46. C OMBINATIONS OF B OARDS IN EP3 S UBSYSTEM Function Boards Involved Process E3 electrical signal EPE3x3 (or EP3x3), ESE3x3 Provide 1:N (N≤5) protection for E3 tributary board EPE3x3 (or EP3x3), BIE3x3, ESE3x3 Process T3 electrical signal EPT3x3 (or EP3x3), ESE3x3 Provide 1:N (N≤5) protection for T3 tributary board EPT3x3 (or EP3x3), BIE3x3, ESE3x3 Note: ZXMP S330 supports at most two groups of 1:N (N≤5) protection for E3/T3 tributary boards. The grey part in Figure 59 shows the positions of boards in EP3 subsystem. Table 47 lists the available slots for the boards. FIGURE 59. POSITIONS OF EP3 S UBSYSTEM BOARDS Service interface board Service interface board Service interface board Service interface board Service interface board Service interface board PWR Service interface board Service interface board Service interface board Service interface board Service interface board SCI PWR Service interface board NCPI Service board CS Service board Service board Service board Service board Service board CS Service board Service board Service board Service board Service board SC SC Service board NCP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Subsystem Functions Composition Position in Subrack
ZXMP S330 (V1.3) Hardware Descriptions 84 Confidential and Proprietary Information of ZTE CORPORATION T ABLE 47. AVAILABLE SLOTS OF B OARDS IN EP3 S UBSYSTEM Board ID Available Slots Remarks EPE3x3, EPT3x3, EP3x3 Lower-layer service board slots 1 to 6 and slots 11 to 16 The protection board can only be inserted in slot 1 and slot 16. ESE3x3 Upper-layer service interface board slots 1 to 6 and slots 11 to 16. - BIS1 Upper-layer service interface board slot 1 and slot 16. It is used when the 1:N (N≤5) protection is required for E3/T3 tributary board. It is inserted in the service interface board slot corresponding to the protection tributary board. EPE3x3/EPT3x3/EP3x3 Boards These three boards are (electrical) tributary boards. The functions are described below: EPE3x3 can process three channels of E3 traffic. EPT3x3 can process three channels of T3 traffic. EP3x3 can process three channels of E3 or T3 traffic. Its port rate can be configured as E3 or T3 via the EMS. It supports mapping/demapping and multiplexing/demultiplexing of three channels of E3/T3 signals into/from any timeslot of an AU-4. EP3x3 supports the unframing and framing methods: f Unframing method: For E3 interface, EP3x3 board detects LOS/AIS alarm and CV performance count. For T3 interface, EP3x3 board only detects LOS alarm and CV performance count. f Framing method: Besides all the information detected in the unframing method, EP3x3 board also detects the LOF/RAI framing alarm of received E3/T3 signal, and AIS alarm of received T3 signal; and displays them on the EMS. User can judge whether fault is caused by transmission equipment or by terminal equipment according to the EMS framing alarm information. The timeslots used to add traffic and the timeslots used to drop traffic can be different. Reads the alarm and performance information of E3/T3 interface and VC-3 path; and reports them to the EMS. Works with BIE3x3 and ESE3x3 boards to implement the 1:N (N≤5) protection for tributary board. Functions
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 85 ZXMP S330 supports at most two groups of 1:5 protection for EPE3x3/EPT3x3/EP3x3 boards. The EPE3x3, EPT3x3, and EP3x3 boards have the same functional blocks, which are shown in Figure 60. FIGURE 60. F UNCTIONAL BLOCK DIAGRAM OF EPE3X3/EPT3X3/ EP3X3 B OARD Traffic processing unit Control unit Clock unit Line interface unit E3/T3 tributary traffic System clock Reference clock NCP board CS board Table 48 describes the functional blocks. T ABLE 48. F UNCTIONAL BLOCKS OF EPE3X3/EPT3X3/EP3X3 B OARD Functional Block Functions Clock unit Allocates the system clock to the clock required by the board itself. Provides clock source to the line interface unit. Line interface unit Receives E3/T3 tributary signal from ESE3x3 board. Sends E3/T3 tributary signal to ESE3x3 board for output. Traffic processing unit Maps and demaps the traffic timeslots of the board. Implements the path protection for tributary traffic. Processes pointer and path overhead. Control unit Provides channels to communicate with NCP board. Implements performance statistics, alarm detection, status setting, and communication between boards. The front panels of EPE3x3, EPT3x3, and EP3x3 boards are similar, as shown in Figure 61. Functional Blocks Front Panel
ZXMP S330 (V1.3) Hardware Descriptions 86 Confidential and Proprietary Information of ZTE CORPORATION FIGURE 61. F RONT P ANEL OF EPE3X3/EPT3X3/EP3X3 B OARD 1. Running status indicator (RUN) 2. Master/standby indicator (M/S) 3. Alarm indicator (ALM) There are three indicators on the front panel, which are in turn the RUN (green) indicator, the M/S (green) indicator, and the ALM (red) indicator from top to bottom. M/S indicator is ON if the board is in active status; it is OFF if the board is in standby status. Table 44 lists possible status of the RUN and ALM indicators. T ABLE 49. DESCRIPTIONS OF RUN AND ALM I NDICATORS RUN Status ALM Status Meaning Flickers at 1 Hz periodically Constantly off Running normally Flickers at 1 Hz periodically Constantly on Flickers at 1 Hz periodically Flickers at 1 Hz periodically Constantly on Flickers at 5 Hz periodically Constantly on Flickers at 1 Hz periodically Flickers at 5 Hz periodically Flickers at 5 Hz periodically Flickers at 5 Hz periodically Flickers at 1 Hz periodically Flickers at 5 Hz periodically Constantly on Fault or alarm occurs during running None Refer to the Overview section of EP3 subsystem. Indicators Interface Position in Subrack
Chapter 3 - Boards Confidential and Proprietary Information of ZTE CORPORATION 87 ESE3x3 Board ESE3x3 board is the interface switching board. It has the following functions: Provides three E3/T3 electrical interface pairs. When 1:N (N≤5) protection for tributary board is needed, ESE3x3 board works with BIE3x3 board to implement the protection. When 1:N (N≤5) protection for tributary board is not needed, ESE3x3 board only provides E3/T3 electrical interfaces. At the receive side, ESE3x3 board receives E3/T3 electrical signal from the outside, extracts the electrical signal, and then sends the signal to the electrical tributary board via the motherboard for processing. At the transmit side, ESE3x3 board receives the signal sent by the electrical tributary board via the motherboard, and then sends the signal to the outside. In the case of 1:N (N≤5) protection for tributary board, the ESE3x3 board determines whether to send electrical signal to the working tributary board or to the protection tributary board according to the control signal from CS board. None None Figure 62 illustrates the interfaces of ESE3x3 board. FIGURE 62. ESE3X3 B OARD I NTERFACES 1. Electrical receive interface 1 2. Electrical transmit interface 1 3. Electrical receive interface 2 4. Electrical transmit interface 2 5. Electrical receive interface 3 6. Electrical transmit interface 3 Functions Working Principle Front Panel Indicator Interfaces
ZXMP S330 (V1.3) Hardware Descriptions 88 Confidential and Proprietary Information of ZTE CORPORATION The ESE3x3 board provides three electrical interface pairs which employ 1.0/2.3 bended PCB welded (with screws attached) sockets (female). Refer to the Overview section of EP3 subsystem. BIE3x3 Board BIE3x3 board is the bridge interface board. It has the following functions: Functions as a bridge between the protection tributary board and the ESE3x3 board corresponding to the faulty tributary board. Used only when 1:N (N≤5) protection for E3/T3 tributary board is required. Inserted in the service interface board slot corresponding to the protection tributary board. When fault occurs to a working EPE3x3/EPT3x3/EP3x3 board, according to the control signal sent by CS board, BIE3x3 board bridges the signals sent/received by the ESE3x3 board which corresponds to the faulty tributary board to the protection tributary board for processing. None None None Refer to the Overview section of EP3 subsystem. Position in Subrack Functions Working Principle Front Panel Indicator Interface Position in Subrack