Cause why the rate of FE services is 125 Mbit/s but not 100 Mbit/s as specified in standards

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When a board that has FE optical ports receives FE services, the port rate is 125 Mbit/s. The rate, however, needs to be converted using the 4B/5B encoding scheme. The rate will become 100 Mbit/s after the conversion is complete.

Other related questions:
Cause why the rate of GE services is 1.25 Gbit/s but not 1000 Mbit/s as specified in standards
When a board that has GE optical ports receives GE services, the port rate is 1.25 Gbit/s. The rate, however, needs to be converted using the 8B/10B encoding scheme. The rate will become 1000 Mbit/s after the conversion is complete.

Whether a TOM board supports 622 Mbit/s services
Yes, a TOM board supports 622 Mbit/s services. When functioning as a tributary board, a TOM board performs mutual conversion between ODU0/ODU1 signals and signals at rates in the range of 100 Mbit/s to 2.67 Gbit/s on the client side. When functioning as an OTU board, a TOM board performs mutual conversion between OTU1 signals and signals at rates in the range of 100 Mbit/s to 2.67 Gbit/s on the client side.

Meaning of colors of interface indicators on the S1700
For details about the meaning of each color of the indicators on the S1700, click S1700 Products Description and choose Hardware Structure > Indicator.

Whether the 2.125G multi-rate optical module on the TOM board supports FE services
Yes, it does.

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