How many DS1s are in a DS3?

Working

DS3 → 28 × DS1

1. 28 × DS1 in each DS3 ANSI T1.10728 DS1s, which is 7 DS2s × 4 DS1s.

• 28 DS1s

Leftover capacity

1.504 Mbit/s of each DS3 line rate (44.736 Mbit/s) sits outside 28 × 1.544 Mbit/s of DS1 line rate (43.232 Mbit/s). That remainder is overhead, fixed stuff or justification. It is not another whole tributary.

DS3 reference · DS1 reference · Open in the converter