How many STM-1s are in a STM-4?

Working

STM-4 → 4 × STM-1

1. 4 × STM-1 in each STM-4 ITU-T G.7074 × STM-1.

• 4 STM-1s

Leftover capacity

0 bit/s of each STM-4 line rate (622.080 Mbit/s) sits outside 4 × 155.520 Mbit/s of STM-1 line rate (622.080 Mbit/s). That remainder is overhead, fixed stuff or justification. It is not another whole tributary.

STM-4 reference · STM-1 reference · Open in the converter