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 DS2s are in a STM-0?

A STM-0 carries 7 DS2s, per ITU-T G.707 and ANSI T1.107. This path maps DS3 into STM-0 as a client, then follows that client's tributaries.

DS2s in a STM-0

Working

STM-0 → 1 × DS3 → 7 × DS2

1 × DS3 in each STM-0 ITU-T G.707Client mappingOne VC-3 carrying a DS3.
7 × DS2 in each DS3 ANSI T1.107M13 multiplex: seven DS2s.

1 DS3
1 × 7 = 7 DS2s

Leftover capacity

7.656 Mbit/s of each STM-0 line rate (51.840 Mbit/s) sits outside 7 × 6.312 Mbit/s of DS2 line rate (44.184 Mbit/s). That remainder is overhead, fixed stuff or justification. It is not another whole tributary.

By bit rate only

Dividing the line rates gives 8.21, which floors to 8 DS2s by bit rate only. The standard mapping is 7. Use the mapping.

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