TPS protection relationship of all Huawei OSN products is listed as follows:
Huawei OSN 7500:
E1/T1: A maximum of one group of 1:4 protection. Slot 1 protects Slots 2, 3, 7 and 18.
E3/D3/E4/STM-1e: A maximum of one group of 1:3 protection. Slot 18 protects Slots 2, 3 and 7.
E1/T1: A maximum of one group of 1:8 protection. Slot 1 protects Slots 2–5, 13–16.
E3/D3/E4/STM-1e: A maximum of two groups of 1:3 protection. Slot 2 protects Slots 3, 4 and 5. Slot 16 protects Slots 13, 14 and 15. A maximum of two groups of 1:1 protection. Slot 2 protects Slot 3 and Slot 16 protects Slot 15.
Huawei OSN 2500:
E1/T: If slots are not split, there is a maximum of one group of 1:4 protection. Slot 5 protects Slots 6, 7, 12 and 13. If Slots 5, 6 and 7 are split, there are a maximum of two groups of 1:2 protection. Slot 5 protects Slots 6 and 7. Slot 19 protects Slots 20 and 21.
E3/D3/E4/STM-1e: A maximum of two groups of 1:1 protection. Slot 6 protects Slot 7, and Slot 13 protects Slot 12.
Huawei OSN 2500CRG:
The OSN2500CRG does not support TPS protection.
Huawei OSN 1500I:
E1/T1: If slots are not split, there is a maximum of one group of 1:2 protection. Slot 11 protects Slots 12 and 13. If Slots 11, 12 and 13 are split, there is a maximum of one group of 1:2 protection. Slot 1 protects Slots 2 and 3, Slots 6 protects Slots 7 and 8, and Slot 11 protects Slots 12 and 13.
E3/D3/E4/STM-1e: A maximum of two groups of 1:1 protection. Slot 12 protects Slot 13.
Huawei OSN 1500II:
E1/T1: If slots are split, there is a maximum of one group of 1:1 protection. Slot 2 protects Slot 12.
