Result: standard mapping
How many DS3s are in an OC-1?
An OC-1 carries 1 DS3, per Telcordia GR-253.
1
DS3 in an OC-1
Working
OC-1 (STS-1) → 1 × DS3
- 1 × DS3 in each OC-1 (STS-1) Telcordia GR-253Asynchronous DS3 mapping into the STS-1 synchronous payload envelope.
- 1 DS3
Leftover capacity
7.104 Mbit/s of each OC-1 line rate (51.840 Mbit/s) sits outside 1 × 44.736 Mbit/s of DS3 line rate (44.736 Mbit/s). That remainder is overhead, fixed stuff or justification. It is not another whole tributary.