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 DS1s are in a STM-1?
A STM-1 carries 84 DS1s, per ITU-T G.707.
84
DS1s in a STM-1
Working
STM-1 → 84 × DS1
- 84 × DS1 in each STM-1 ITU-T G.70784 VC-11 tributaries: 3 TUG-3 × 7 TUG-2 × 4 TU-11.
- 84 DS1s
Leftover capacity
25.824 Mbit/s of each STM-1 line rate (155.520 Mbit/s) sits outside 84 × 1.544 Mbit/s of DS1 line rate (129.696 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 100.72, which floors to 100 DS1s by bit rate only. The standard mapping is 84. Use the mapping.
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