Quantity is how many containers you have. The result is how many tributaries fit, the path, and the leftover line rate. The choices stay in the URL, so you can share them.
Result: standard mapping
How many DS3s are in an OC-3?
An OC-3 carries 3 DS3s, per Telcordia GR-253.
3
DS3s in an OC-3
Working
OC-3 → 3 × OC-1 (STS-1) → 1 × DS3
- 3 × OC-1 (STS-1) in each OC-3 Telcordia GR-2533 × OC-1 (STS-1). Channelized OC-3 is 3 STS-1s.
- 1 × DS3 in each OC-1 (STS-1) Telcordia GR-253Asynchronous DS3 mapping into the STS-1 synchronous payload envelope.
- 3 OC-1s
- 3 × 1 = 3 DS3s
Leftover capacity
21.312 Mbit/s of each OC-3 line rate (155.520 Mbit/s) sits outside 3 × 44.736 Mbit/s of DS3 line rate (134.208 Mbit/s). That remainder is overhead, fixed stuff or justification. It is not another whole tributary.
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