Network Configuration Requirements. Board Configuration Requirements. Equipment-Level Protection Configuration Requirements, страница 6

Equipment-level protection type	Requirement
PIU: 1+1 hot backup	Required
GXCS/EXCS: 1+1 hot backup	Required
SCC: 1+1 hot backup	Recommended
Board +3.3 V power supply: 1:N centralized backup	Support by default
E1/DS1 service: 1:N (N£8) TPS protection	Recommended
E3/DS3 service: 1:N (N£3) TPS protection	Recommended
E4 service: 1:N (N£3) TPS protection	Recommended
STM-1(E) service: 1:N (N£3) TPS protection	Recommended
10M/100M Ethernet service: 1:1 TPS protection	Recommended

Figure A-1 Slot configuration requirement of equipment-level protection

A.3.1  TPS Configuration for E1/T1 Service

The protection board is in slot 1 and the protected boards are in slots 2 to 5, or slots 13 to 16. Figure A-2 shows the1:N (N£8) tributary protection switching (TPS) configuration for E1/T1 services.

P: protection board

W: working board

Figure A-2 TPS configuration for E1/T1 service

A.3.2  TPS Configuration for E3/DS3 Service

When the protection board is in slot 2, the protected boards are in slots 3, 4, and 5. When the protection board is in slot 16, the protected boards are in slots 13, 14, and 15. The TPS configuration shown in Figure A-3 realizes a pair of 1:N (N£3) TPS protection.

P: protection board

W: working board

Figure A-3 TPS configuration for E3/DS3 services

A.3.3  TPS Configuration for E4 Service

The TPS configuration for E4 service is the same as that of E3/DS3 service. When the protection board is in slot 2, the protected boards are in slots 3, 4, and 5. When the protection board is in slot 16, the protected boards are in slots 13, 14, and 15.The TPS configuration shown in Figure A-4 realizes a pair of 1:N (N£3) TPS protection.

P: protection board

W: working board

Figure A-4 TPS configuration for E4 service

The SPQ4 board and MU04 board can access E4 signals, STM-1 signals or both of them at the same time.

A.3.4  TPS Configuration for STM-1 Service (Electrical Signal)

The TPS configuration of STM-1 service is the same as that of E3/DS3 and E4 service. When the protection board is in slot 2, the protected boards are in slots 3, 4, and 5; when the protection board is in slot 16, the protected boards are in slots 13, 14, and 15. The TPS configuration of STM-1 electrical signal shown in Figure A-5 realizes a pair of 1:N (N£3) TPS protection.

P: protection board

W: working board

Figure A-5 TPS configuration for STM-1 electrical signal

A.3.5  TPS Configuration for 10M/100M Ethernet Services

The TPS configuration of 10M/100M Ethernet service is the same as that of E3/DS3, and E4 services. At present, 1:1 TPS protection can only be performed on the EFS0 board. The OptiX OSN 3500 supports 1:1 TPS protection for two groups of Ethernet services.

n  The protection slot is slot 2 and the protected slot is slot 3.

n  The protection slot is slot 16 and the protected slot is slot 15.

Figure A-6 shows two groups of 1:1 TPS protection for Ethernet service.

P: Protection board          W: Working board

Figure A-6 TPS configuration for Ethernet services

A.3.6  TPS Configuration for Hybrid Services

The OptiX OSN 3500 supports TPS for hybrid services and supports co-existence of three types of TPS. Presented below is a protection example for a hybrid service.

n  E1/DS1 services: the protection slot is slot 1, the protected slots are slots 4 and 5.

n  E3/DS3 services: the protection slot is slot 2, the protected slot is slot 3.