Fiber routingS
3. Auxiliary Units Logic control module
This unit:
− Enables the communication between the boards and the SCC.
− Collects and reports alarms and performance events to the SCC.
− Processes the configuration command from the SCC.
Power module
Provide the board with required DC voltages.
6.2.3 Front Panel
Figure 6-9 shows the front panel of the PL3, PD3, PL3A, C34S and D34S.
STAT ACT PROG SRV
PL3
PL3
STAT ACT PROG SRV
PD3
PD3
STAT PROGACT SRV
PL3A
PL3A OUT1IN1OUT2IN2OUT3IN3
OUT4IN4OUT5IN5OUT6IN6 D34S
D34S
OUT1IN1OUT2IN2OUT3IN3
PL3 PD3 PL3A C34S D34S
Figure 6-9 The front panel of the PD3, PL3, PL3A, C34S and D34S
1. Indicators
There are four indicators on the PL3, PD3, and PL3A.
Board hardware status indicator (STAT) – double colours (red, green)
Service active status indicator (ACT) – green
Board software status indicator (PROG) – double colours (red, green)
Service alarm indicator (SRV) – triple colours (red, green, and yellow) For detailed description of the indicators, see Appendix A.
There are no indicators on the C34S, D34S or TSB8.
2. Interfaces
There are no interfaces on the PL3 or PD3. The board should work with the D34S to input or output E3/DS3 signals.
There are three pairs of 75-ohm SMB unbalanced interfaces on the front panel of the PL3A.
Table 6-10 describes interfaces on the D34S.
Table 6-10 Interfaces on the D34S
Interface C34S D34S
Access service 3 x E3/DS3 6 x E3/DS3
Interface 75 ohm unbalanced interface
Interface type SMB
Corresponding processing board PL3, PD3
6.2.4 Protection Configuration
The PL3/PD3 works with the C34S/D34S and TSB8 to achieve 1:N protection for 3/6 x E3/DS3 signals. Table 6-11 lists the TPS protection of the PL3/PD3 in the OptiX OSN products.
Table 6-11 The TPS protection of the PL3/PD3
Product TPS protection TPS configuration OptiX OSN 3500
(80 Gbit/s) OptiX OSN 3500 (40 Gbit/s)
Support two groups of 1:N (N≤3) TPS protection.
The board in slot 2 protects the boards in slots 3, 4, and 5.
The board in slot 16 protects the boards in slots 13, 14, and 15.
OptiX OSN 2500 Support two groups of 1:1 TPS protection.
The board in slot 6 protects the one in slot 7.
The board in slot 13 protects the one in slot 12.
OptiX OSN 2500
REG Not supported. —
1500A OptiX OSN
1500B Support one group of 1:1
TPS protection. The board in slot 12 protects the one in slot 13.
As equipment-level protection, the TPS protection switches signals to the protection board upon the failure of the working board. This avoids complicated network-level protections effectively, and enhances the reliability of the equipment.
1. Protection Principle
The protection principle of the PL3 is the same as that of the PD3. Figure 6-10 shows the principle of 1:3 TPS for the PD3 in the OptiX OSN 3500.
PD3
Working
TSB8 D34S D34S D34S
Slot 2 Slot 3 Slot 4 Slot 5 Fail
Cross-connect
unit Switch control signal
SLOT 9/10
1 2 3 1 2 1 2 1 2
Working Working
Protection
6 x E3/DS3 6 x E3/DS3 6 x E3/DS3
PD3 PD3 PD3
Figure 6-10 The 1:3 TPS protection of the PD3 in the OptiX OSN 3500
Normal status
When each working board works normally, the service signal is accessed to the corresponding PD3 directly through position 1 of the control switch on the D34S.
Switching status
When a working PD3 failure is detected, the working board in each slot is protected in the following manners.
When the working board in slot 3 fails, the control switch of the corresponding D34S switches from position 1 to position 2. At the same time, the control switch of the TSB8 switches from position 1 to position 3. Slot 2 is now protecting slot 3.
When the working board in slot 4 fails, the control switch of the corresponding D34S switches from position 1 to position 2. At the same time, the control switch of the TSB8 switches from position 1 to position 2. Slot 2 is now protecting slot 4.
When the working board in slot 5 fails, the control switch of the corresponding D34S switches from position 1 to position 2, while the control switch of the TSB8 does not act. Slot 2 is now protecting slot 5.
2. Board Configuration of the OptiX OSN 3500
Table 6-12 shows the relation between the working board and protection board when the equipment is configured as 1:3 TPS protection for the PL3 or PD3.
Table 6-12 Relation between working and protection boards upon 1:3 TPS in the OptiX OSN 3500 Working board Protection board Slot configuration
PL3 (E3) PL3 (E3)
PL3 (DS3) PL3 (DS3)
PD3 (E3) PD3 (E3)
PD3 (DS3) PD3 (DS3)
As shown in Figure 6-11.
S
TSB8 TSB8EU08 EU08 EU08 EU08 EU08 EU08 SCC AUX
PIU PIU
Figure 6-11 Board layout upon 1:3 TPS protection for the PL3/PD3 in the OptiX OSN 3500
In the figure, slot 2 protects slots 3, 4, and 5, and slot 16 protects slots 13, 14, and 15.
Table 6-13 shows the slot assignment of the PL3/PD3, D34S, and TSB8.
Table 6-13 Slot assignment of the PL3/PD3, D34S and TSB8 in the OptiX OSN 3500
Board Protection group 1 Protection group 2
PL3/PD3 (protection board) Slot 2 Slot 16
PL3/PD3 (working board) Slots 3, 4, 5 Slots 13, 14, 15
TSB8 Slot 19 Slot 35
D34S Slots 21, 23, 25 Slots 29, 31, 33
3. Board Configuration of the OptiX OSN 2500
Table 6-14 shows the relation between the working board and protection board when the equipment is configured as 1:1 TPS protection for the PL3 or PD3.
Table 6-14 Relation between working and protection boards upon 1:1 TPS in the OptiX OSN 2500 Working board Protection board Slot configuration
PL3 (E3) PL3 (E3)
PL3 (DS3) PL3 (DS3)
PD3 (E3) PD3 (E3)
PD3 (DS3) PD3 (DS3)
As shown in Figure 6-12.
Fiber routing
Protection 1 SAP
Working 2 Protection 2
Figure 6-12 Board layout upon 1:1 TPS protection for the PL3/PD3 n the OptiX OSN 2500
In the figure, slot 6 protects slot7, and slot 13 protects slots 12.
Table 6-15 shows the slot assignment of the PL3/PD3, D34S, and TSB8.
Table 6-15 Slot assignment of the PL3/PD3, D34S and TSB8 in the OptiX OSN 2500
Board Protection group 1 Protection group 2
PL3/PD3 (protection board) Slot 6 Slot 13 PL3/PD3 (working board) Slot 7 Slot 12
TSB8 Slot 1 Slot 17
D34S Slot 3 Slot 15
4. Board Configuration of the OptiX OSN 1500B
Table 6-16 shows the relation between the working board and protection board when the equipment is configured as 1:1 TPS protection for the PL3 or PD3.
Table 6-16 Relation between working and protection boards upon 1:1 TPS in the OptiX OSN 1500B Working board Protection board Slot configuration
PL3 (E3) PL3 (E3)
PL3 (DS3) PL3 (DS3)
PD3 (E3) PD3 (E3)
PD3 (DS3) PD3 (DS3)
As shown in Figure 6-13.
Slot 14
Slot 18 PIU Slot 15
Slot 16 Slot 17
Slot 20
FAN
Slot 1 Slot 2 Slot 3 Slot 4
Slot 19 PIU
Slot 6 Slot 7 Slot 8 Slot 9 Slot 10 AUX Slot 5
TSB8
EU08
Protection Working CXL16/4/1 CXL16/4/1
EOW Slot 11
Slot 12 Slot 13
Figure 6-13 Board layout upon 1:1 TPS protection for the PL3/PD3 in the OptiX OSN 1500B
In the figure, slot 12 protects slot 13.
Table 6-17 shows the slot assignment of the PL3/PD3, D34S, and TSB8.
Table 6-17 Slot assignment of the PL3/PD3, D34S, and TSB8 in the OptiX OSN 1500B in the OptiX OSN 1500B
Board Protection group
PL3/PD3 (protection board) Slot 12 PL3/PD3 (working board) Slot 13
TSB8 Slot 14
D34S Slot 16
6.2.5 Parameter Configuration
The following parameters should be set on the T2000 for the PL3/PD3.
Load indication
When the service channel does not process the services it carries, select “Do not load”. Otherwise, select “Load”.
Tributary loopback
The tributary loopback function is generally used to locate faults for each service channel.
The tributary loopback is a diagnosis function, which may interrupt services on relevant channels.
Channel service type
E3 or DS3 can be selected on the T2000 according to the input service type.
6.2.6 Version Description
Version N1 is the only version for the PL3, PD3, PL3A, C34S, D34S, and TSB8. The boards can be used in the OptiX OSN 3500, OptiX OSN 2500, OptiX OSN 1500A, and OptiX OSN 1500B.
6.2.7 Technical Parameters
Table 6-18 lists the technical parameters of the PL3, PD3, PL3A, C34S, and D34S.
Table 6-18 Technical parameters of the PL3, PD3, PL3A, C34S and D34S Description Parameter
PL3 PD3 PL3A C34S D34S
Bit rate 34368 kbit/s or 44736 kbit/s Processing capability 3 x
E3/DS3 6 x
E3/DS3 3 x
E3/DS3 None None
Access capability 0 0 3 x
E3/DS3 3 x
E3/DS3 6 x E3/DS3 Line code pattern E3:HDB3, DS3:B3ZS
Connector None None SMB SMB
Dimensions (mm) 262.05 (H) x 220 (D) x 25.4 (W)
H
W D
262.05 (H) x 110 (D) x 22 (W)
262.05 (H) x 110 (D) x 22 (W)
Weight (kg) 1.00 1.12 1.00 0.31 0.38
Power consumption (W) 15 19 15 2 2
Long-term operating condition
Temperature: 0°C to 45°C Humidity: 10%–90%
Short-term operating condition
Temperature: –5°C to 50°C Humidity: 5%–95%
Environment for storage Temperature: –40°C to 70°C Humidity: 10%–100%
Environment for
transportation Temperature: –40°C to 70°C Humidity: 10%–100%
6.3 PQ1/PQM/D75S/D12S/D12B
The PQ1 is a 63 x E1 processing board.
The PQM is a 63 x E1/T1 processing board.
The D75S is a 32 x 75 ohm E1 PDH interface switching board.
The D12S is a 32 x 120 ohm E1/T1 PDH interface switching board.
The D12B is a 32 x 120 ohm E1/T1 PDH interface board.
Table 6-19 lists slots for the PQ1, PQM, D75S, D12S, and D12B in the OptiX OSN products.
Table 6-19 Slots for the PQ1, PQM, D75S, D12S, and D12B
Product PQ1/PQM D75S/D12S/D12B
OptiX OSN 3500 (80 Gbit/s) Slots 1–5, 13–16 Slots 19–26, 29–36 OptiX OSN 3500 (40 Gbit/s) Slots 1–5, 13–16 Slots 19–26, 29–36 OptiX OSN 2500 Slots 5–7,12–13 Slots 1–4,15–18 OptiX OSN 2500 REG Not available Not available OptiX OSN 1500A Not available Not available OptiX OSN 1500B Slots 11–13 Slots 14–17
Table 6-20 shows the difference between the PQ1 and PQM.
Table 6-20 Comparison between the PQ1 and PQM Board
Comparison PQ1 PQM
Processing capability 63 x E1 63 x E1/T1 Interface board (providing
TPS) 2 x D75S or 2 x D12S 2 x D12S
Interface board (NOT
providing TPS) 2 x D12B, 2 x D75S or 2
x D12S 2 x D12B or 2 x D12S
6.3.1 Functionality
Functionality PQ1 PQM D75S/D12S/D12B
Basic function 63 x E1 processing
board 63 x E1/T1
processing board E1/T1 interface board Refer to Table 6-21 for details.
Service processing
When working with interface boards, the PQ1 can access and process 63 x E1 signals.
When working with interface boards, the PQM can access and process 63 x E1/T1 signals.
Functionality PQ1 PQM D75S/D12S/D12B Overhead
processing Support the processing of the path overheads (transparent transmission and termination) at VC-12 level, such as J2.
Alarms and performance events
Provide abundant alarms and performance events, which simplify maintenance and administration.
Protection schemes
The PQ1/PQM supports TPS protection when working with interface boards and switching & bridging boards.
Support multiple protection schemes, such as SNCP protection, with switching time less than 50ms.
Maintenance Support inloop and outloop at electrical interfaces.
Support inloop and outloop at VC-12 level, locating fault fast.
Support warm and cold reset. Warm reset brings no impact to services.
Support the query of board information.
Support the in-service uploading of FPGA.
Support smooth board software upgrade.
6.3.2 Principle
Figure 6-14 shows the functional block diagram of the PQ1/PQM (one channel of E1/T1 signal is processed).
Backplane
Decoder
Encoder Interface
module
Logic control module D75S/D12S/
D12B Cross-connect unit
+3.3 V（Standby）
+3.3 V E1/T1
Mapping
De-mapping
SCC
Power module +2.7 V
+5 V
-48 V
Cross-connect unit E1/T1
D75S/D12S/
D12B
Figure 6-14 The functional block diagram of the PQ1/PQM
1. In Receive Direction
The input E3/DS3 signal enters, through the interface module, the decoder, where HDB3 or B8ZS data signal and clock signal are recovered. Then, the signal is sent to the mapping module.
In the mapping module, the E1/T1 signal is mapped asynchronously to C-12, and formed as VC-12 after channel overhead processing, as TU-12 after pointer processing, and finally as VC-4 through multiplexing. Then, the signal is sent to the cross-connect unit. The mapping process is shown in Figure 6-15.
TUG-3 TUG-2 TU-12
VC-12
C 12 2048 kbit/s or 1544 kbit/s
VC-4 x 7 x 3
-12 x 3
Figure 6-15 The mapping and multiplexing process of E1/T1 signals
2. In Transmit Direction
The demapping module extracts binary data and clock signal from the VC-4 signal from the cross-connect unit, and sends the signal to the encoder, where E1 or T1 signals are output.
3. Auxiliary Units
Logic control module This unit:
− communicates the board with the SCC.
− collects and reports alarms and performance events to the SCC.
− process the configuration command from the SCC.
Power module
Provide the board with required DC voltages.
6.3.3 Front Panel
Figure 6-16 shows the front panel of the PQ1, PQM, D75S, D12S, and D12B.
STAT ACT PROG SRV
PQ1
PQ1
STAT ACT PROG SRV
PQM
PQM
D75S
D75S
1～89～1617～2425～32
D12S
D12S
1～89～1617～2425～32
D12B
D12B
1～89～1617～2425～32
PQ1 PQM D75S D12S D12B
Figure 6-16 The front panel of the PQ1, PQM, D75S, D12S, and D12B
1. Indicators
There are four indicators on the PQ1 and PQM.
Board hardware status indicator (STAT) – double colors (red, green)
Service active status indicator (ACT) – green
Board software status indicator (PROG) – double colors (red, green)
Service alarm indicator (SRV) – three colors (red, green, yellow) For detailed description of the indicators, see Appendix A.
There are no indicators on the D75S, D12S, or D12B.
2. Interfaces
There are no interfaces on the PQ1 or PQM. The board should work with the D75S, D12S, or D12B to input/output E1/T1 signals.
Table 6-21 shows the difference between the D75S, D12S, and D12B.
Table 6-21 Comparison between the D75S, D12S, and D12B Board
Comparison D75S D12S D12B
Board
Comparison D75S D12S D12B
Interface 75 ohm
unbalanced interface
120 ohm balanced interface
120 ohm balanced interface
Interface type DB44 DB44 DB44
6.3.4 Protection Configuration
The PQ1 and PQM work with the D75S or D12S to achieve 1:N TPS protection for 63 x E1/T1 signals. Table 6-22 shows the TPS protection of the PQ1 and PQM in the OptiX OSN products.
Table 6-22 The TPS protection of the PQ1 and PQM
Product TPS protection TPS configuration OptiX OSN 3500
(80 Gbit/s) OptiX OSN 3500 (40 Gbit/s)
Support one group of 1:N
(N≤8) TPS protection The board in slot 1 protects the ones in slots 2, 3, 4, 5, 13, 14, 15, and 16.
OptiX OSN 2500 Support one group of 1:N (N≤4) TPS protection
The board in slot 5 protects the ones in slots 6, 7, 12, and 13.
OptiX OSN 2500
REG Not supported —
OptiX OSN
1500A Not supported —
OptiX OSN
1500B Support one group of 1:N
(N≤2) TPS protection The board in slot 11 protects the ones in slots 12 and 13.
1. Protection Principle
The protection principle of the PQ1 is the same with that of the PQM. Figure 6-17 shows the protection principle of the PQ1 in the OptiX OSN 3500.
S
D75S D75S D75S D75S D75S D75S D75S D75S D75S D75S D75S D75S D75S D75S D75S D75S
E1 protection bus
Cross-connect and timing board
E1
Figure 6-17 The 1:8 TPS protection of the PQ1 in the OptiX OSN 3500
When detecting a working PQ1 is faulty, the cross-connect board delivers the service switching command to control the interface board to switch the faulty board to
protection board, thus achieving the protection of services.
2. Board Configuration of the OptiX OSN 3500
When the equipment is configured as with 1:8 TPS for the PQ1 or PQM, the relation between the working board and protection board is shown in Table 6-23.
Table 6-23 Relation between working and protection boards upon 1:8 TPS in the OptiX OSN 3500 Working board Protection board Slot configuration
PQ1 (75 ohm) PQ1 (75 ohm)
PQ1 (120 ohm) PQ1 (120 ohm) or PQM PQM PQM
The board in slot 1 is a protection board, protecting the boards in slots 2, 3, 4, 5, 13, 14, 15, and 16.
Figure 6-18 shows the slots for the working and the protection boards.
S
Protection Working Working Working
D75S D75S
D75S D75S D75S D75S D75S D75S SCC AUX
PIU PIU
Working Working
D75S D75S D75S D75S D75S D75S D75S
Figure 6-18 Slot assignment upon 1:8 protection for the PQ1/PQM in the OptiX OSN 3500
3. Board Configuration of the OptiX OSN 2500
When the equipment is configured as with 1:4 TPS for the PQ1 or PQM, the relation between the working and the protection board is shown in Table 6-24.
Table 6-24 Relation between working and protection boards upon 1:4 TPS in the OptiX OSN 2500 Working board Protection board Slot
PQ1 (75 ohm) PQ1 (75 ohm)
PQ1 (120 ohm) PQ1 (120 ohm) or PQM PQM PQM
The board in slot 5 is a protection board, protecting the boards in slots 6, 7, 12, and 13.
Figure 6-19 shows the slots for the working and the protection boards.
Fiber routing
Working Working Working
Figure 6-19 Slot assignment upon 1:4 protection for the PQ1/PQM in the OptiX OSN 2500
4. Board Configuration of the OptiX OSN 1500B
When the equipment is configured as with 1:2 TPS for the PQ1 or PQM, the relation between the working board and protection board is shown in Table 6-25.
Table 6-25 Board distribution upon 1:2 TPS for the PQ1 or PQM in the OptiX OSN 1500B
Board Protection group
PQ1/PQM (protection) Slot 11 PQ1/PQM (working) Slots 12, 13
D75S/D12S Slots 14, 15, 16, 17
6.3.5 Parameter Configuration
The following parameter should be set through the NM for the PQ1 or PQM.
J2
It is the VC-12 path trace byte. Successive transmission of the lower order access point identifier through J2 helps the receive end learn that its connection with the transmit end in this path is in continuous connection status.
6.3.6 Version Description
Version N1 is the only version of the PQ1, PQM, D75S, D12S, and D12B. The boards can be used in the OptiX OSN 3500, OptiX OSN 2500, and OptiX OSN 1500B.
6.3.7 Technical Parameters
Table 6-26 lists the technical parameters of the PQ1, PQM, D75S, D12S, and D12B.
Table 6-26 Technical parameters of the PQ1, PQM, D75S, D12S, and D12B Description
Parameter
PQ1 PQM D75S D12S D12B
Bit rate 2048 1544 kbit/s or 2048 kbit/s
Description Parameter
PQ1 PQM D75S D12S D12B
Processing
capability 63 x E1 63 x
E1/T1 Support
TPS Support
TPS Not support TPS Accessing
capability
0 0 32 x E1 32 x
E1/T1
32 x E1/T1
Line code pattern E1: HDB3, T1: B8ZS, AMI (Alternate Mark Inversion)
Connector None None DB44 DB44 DB44
Dimensions (mm) 262.05 (H) x 220 (D) x 25.4 (W)
262.05 (H) x 110 (D) x 22 (W)
H
W D
Weight (kg) 1.01 1.01 0.35 0.35 0.31
Power
consumption (W) 19 22 5.5 9 1
Long-term
operating condition Temperature: 0°C to 45°C Humidity: 10%–90%
Short-term
operating condition Temperature: –5°C to 50°C Humidity: 5%–95%
Environment for
storage Temperature: –40°C to 70°C Humidity: 10%–100%
Environment for
transportation Temperature: –40°C to 70°C Humidity: 10%–100%
6.4 PD1/PL1/L75S/L12S
The PD1 is a 32 x E1 half-slot processing board. It is used with the L75S or L12S in the OptiX OSN 1500A and used with D75S or D12S in the OptiX OSN 2500 and 1500B.
The PL1A is a 16 x E1(75-ohm) half-slot processing board, with signals led out from the front panel.
The PL1B is a 16 x E1 (120-ohm) half-slot processing board, with signals led out from the front panel.
The L75S is a 16 x E1 interface switching board (75-ohm). It is only used in the OptiX OSN 1500A.
The L12S is a 16 x E1/T1 interface switching board (120-ohm). It is only used in the OptiX OSN 1500A.
Note:
When the impedance of interfaces is ignored, the PL1A and PL1B are called PL1 hereinafter.
Table 6-27 lists slots for the PD1, PL1, L75S, and L12S in the OptiX OSN products.
Table 6-27 Slots for the PD1, PL1, L75S, and L12S
Product PD1 PL1 L75S/L12S
OptiX OSN 3500
(80Gbit/s) Not available Not available Not available OptiX OSN 3500
(40Gbit/s) Not available Not available Not available OptiX OSN 2500 Slots 5–7, 19–21 Not available Not available OptiX OSN 2500
REG Not available Not available Not available OptiX OSN 1500A Slots 2, 12 (after slot
segmentation) Slots 6–9 Slots 6–7 OptiX OSN 1500B Slots 1–3, 6–8, 11–13
(after slot segmentation)
Slots 6–9 Not available
6.4.1 Functionality
Functionality PD1 PL1 L75S/L12S
Basic function 32 x E1 processing board
16 x E1 processing board
E1/T1 interface board
Functionality PD1 PL1 L75S/L12S Service processing When working with interface boards, the PD1 can access and
process 32 x E1 signals. The PL1 accesses and processes 16 x E1 signals directly.
Overhead processing
Support the processing of the path overheads (transparent transmission and termination) at VC-12 level, such as J2.
Alarms and performance events
Provide abundant alarms and performance events, which simplify maintenance and administration.
Protection
schemes The PD1 supports TPS protection when working with interface switching boards.
Support multiple protection schemes, such as SNCP protection, with switching time less than 50ms.
Maintenance Support inloop and outloop at electrical interfaces.
Support inloop and outloop at VC-12 level, locating fault fast.
Support warm and cold reset. Warm reset brings no impact to services.
Support the query of board information.
Support the in-service uploading of FPGA.
Support smooth board software upgrade.
6.4.2 Principle
The working principle of the PD1 and PL1 is the same as that of the PQ1. Refer to section 6.3.2 “Principle” for details.
6.4.3 Front Panel
Figure 6-20 shows the front panel of the PD1, PL1, L75S, and L12S.
PD1 STATACT SRVPROG
PL1 STATACT SRVPROG
1-16
L12S
1-16
L75S
1-16
PD1 PL1 L12S L75S Figure 6-20 The front panel of the PD1, PL1, L12S and L75S
1. Indicators
There are four indicators on the PD1 and PL1.
Board hardware status indicator (STAT) – double colors (red, green)
Service active status indicator (ACT) – green
Board software status indicator (PROG) – double colors (red, green)
Service alarm indicator (SRV) – three colors (red, green, yellow) For detailed description of the indicators, see Appendix A.
There are no indicators on the L75S and L12S.
2. Interfaces
In the OptiX OSN 1500A, the PD1 works with the L75S or L12S to input/output E1 signals. In the OptiX OSN 2500 and OptiX OSN 1500B, the PD1 working with the D75S or D12S to input/output E1 signals. Refer to section 6.3.3 for details on the D75S and D12S.
Table 6-28 compares the PL1, L75S, and L12S.
Table 6-28 Comparison between the PL1, L75S, and L12S Board
Comparison L75S L12S PL1
Access capability 16 x E1 16 x E1 16 x E1
Interface 75 ohm
unbalanced interface
120 ohm balanced interface
75/120 ohm
unbalanced/balance d interface
Interface type 2mmHM 2mmHM 2mmHM
6.4.4 Protection Configuration
The PD1 and PL1 can only be used in the OptiX OSN 2500 and OptiX OSN 1500. The PD1 works with L75S/D75S or L12S/D12S to achieve 1:N protection to E1 signals.
Table 6-29 shows the TPS protection of the PD1.
Table 6-29 The TPS protection of the PD1
Product TPS protection TPS configuration OptiX OSN 3500
(80 Gbit/s) OptiX OSN 3500 (40 Gbit/s)
Not supported —
OptiX OSN 2500 Support two groups of
1:N (N≤2) TPS protection The board in slot 5 protects the ones in slots 6 and 7.
The board in slot 19 protects the ones in slots 20 and 21.
OptiX OSN 2500 REG
Not supported —
Product TPS protection TPS configuration
Product TPS protection TPS configuration