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 E1s are in an OC-192?

An OC-192 carries 4,032 E1s, per Telcordia GR-253.

4,032

E1s in an OC-192

Working

OC-192 → 192 × OC-1 (STS-1) → 21 × E1

192 × OC-1 (STS-1) in each OC-192 Telcordia GR-253192 × OC-1 (STS-1). Channelized OC-192 is 192 STS-1s.
21 × E1 in each OC-1 (STS-1) Telcordia GR-253Seven VT groups × three VT2 (E1).

192 OC-1s
192 × 21 = 4,032 E1s

Leftover capacity

1.695744 Gbit/s of each OC-192 line rate (9.953280 Gbit/s) sits outside 4,032 × 2.048 Mbit/s of E1 line rate (8.257536 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 4,860, which floors to 4,860 E1s by bit rate only. The standard mapping is 4,032. Use the mapping.

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