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-64?

A STM-64 carries 5,376 DS1s, per ITU-T G.707.

5,376

DS1s in a STM-64

Working

STM-64 → 64 × STM-1 → 84 × DS1

64 × STM-1 in each STM-64 ITU-T G.70764 × STM-1.
84 × DS1 in each STM-1 ITU-T G.70784 VC-11 tributaries: 3 TUG-3 × 7 TUG-2 × 4 TU-11.

64 STM-1s
64 × 84 = 5,376 DS1s

Leftover capacity

1.652736 Gbit/s of each STM-64 line rate (9.953280 Gbit/s) sits outside 5,376 × 1.544 Mbit/s of DS1 line rate (8.300544 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 6,446.42, which floors to 6,446 DS1s by bit rate only. The standard mapping is 5,376. Use the mapping.

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