How many STM-1s are in a STM-256?

Working

STM-256 → 256 × STM-1

1. 256 × STM-1 in each STM-256 ITU-T G.707256 × STM-1.

• 256 STM-1s

Leftover capacity

0 bit/s of each STM-256 line rate (39.813120 Gbit/s) sits outside 256 × 155.520 Mbit/s of STM-1 line rate (39.813120 Gbit/s). That remainder is overhead, fixed stuff or justification. It is not another whole tributary.

STM-256 reference · STM-1 reference · Open in the converter