Result: standard mapping
How many DS2s are in an OC-192?
An OC-192 carries 1,344 DS2s, per Telcordia GR-253.
1,344
DS2s in an OC-192
Working
OC-192 → 192 × OC-1 (STS-1) → 7 × DS2
- 192 × OC-1 (STS-1) in each OC-192 Telcordia GR-253192 × OC-1 (STS-1). Channelized OC-192 is 192 STS-1s.
- 7 × DS2 in each OC-1 (STS-1) Telcordia GR-253Seven VT groups, one VT6 (DS2) each.
- 192 OC-1s
- 192 × 7 = 1,344 DS2s
Leftover capacity
1.469952 Gbit/s of each OC-192 line rate (9.953280 Gbit/s) sits outside 1,344 × 6.312 Mbit/s of DS2 line rate (8.483328 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 1,576.88, which floors to 1,576 DS2s by bit rate only. The standard mapping is 1,344. Use the mapping.