Result: standard mapping
How many DS2s are in an OC-48?
An OC-48 carries 336 DS2s, per Telcordia GR-253.
336
DS2s in an OC-48
Working
OC-48 → 48 × OC-1 (STS-1) → 7 × DS2
- 48 × OC-1 (STS-1) in each OC-48 Telcordia GR-25348 × OC-1 (STS-1). Channelized OC-48 is 48 STS-1s.
- 7 × DS2 in each OC-1 (STS-1) Telcordia GR-253Seven VT groups, one VT6 (DS2) each.
- 48 OC-1s
- 48 × 7 = 336 DS2s
Leftover capacity
367.488 Mbit/s of each OC-48 line rate (2.488320 Gbit/s) sits outside 336 × 6.312 Mbit/s of DS2 line rate (2.120832 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 394.22, which floors to 394 DS2s by bit rate only. The standard mapping is 336. Use the mapping.