Result: standard mapping
How many DS3s are in an OC-192?
An OC-192 carries 192 DS3s, per Telcordia GR-253.
192
DS3s in an OC-192
Working
OC-192 → 192 × OC-1 (STS-1) → 1 × DS3
- 192 × OC-1 (STS-1) in each OC-192 Telcordia GR-253192 × OC-1 (STS-1). Channelized OC-192 is 192 STS-1s.
- 1 × DS3 in each OC-1 (STS-1) Telcordia GR-253Asynchronous DS3 mapping into the STS-1 synchronous payload envelope.
- 192 OC-1s
- 192 × 1 = 192 DS3s
Leftover capacity
1.363968 Gbit/s of each OC-192 line rate (9.953280 Gbit/s) sits outside 192 × 44.736 Mbit/s of DS3 line rate (8.589312 Gbit/s). That remainder is overhead, fixed stuff or justification. It is not another whole tributary.
By bit rate only
Dividing the line rates gives 222.48, which floors to 222 DS3s by bit rate only. The standard mapping is 192. Use the mapping.