Does Huawei OSN 1500/2500/3500 configure ring multiplexing segment ring with limitations on even slots?

Answer; Yes. When the rate levels of both the east and westbound veneers of the multiplexed segment ring are below STM-16, they must be configured in pairwise slots (this restriction is not imposed because veneers of STM-16 and STM-16 or above levels support shared optical paths, and one veneer sometimes needs to correspond to two veneers). The pairwise relationship is:

Huawei OSN7500 device

(1, 18), (2, 17), (3, 16), (4,15), (5,14), (6,13), (7,12), (8,11), (26,27), (28,29), (30,31)

Huawei OSN3500 devices

(3,16), (4,15), (5,14), (6,13), (7,12), (8,11); [at 40G]

(2, 17), (3, 16), (4, 15), (5, 14), (6, 13), (7, 12), (8, 11); [at 80G]

Huawei OSN2500 devices

(6, 13), (7, 12), (8, 11), (9, 10); [when slots are not split]

(6, 20), (7, 21), (5, 19); [when slots are split]

Huawei OSN1500I devices

(6, 9), (7, 8), (12, 13), (4, 5); [When slots are not split]

(6, 9), (7, 8), (1, 11), (2, 12), (3, 13), (4, 5); [when slots are split]

Huawei OSN1500II devices

(6, 9), (7, 8), (12, 13), (4, 5); [When slots are not split]

(6, 9), (7, 8), (2, 12), (3, 13), (4, 5); [when slots are split]

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