Result: standard mapping
How many DS1s are in a STM-16?
A STM-16 carries 1,344 DS1s, per ITU-T G.707.
1,344
DS1s in a STM-16
Working
STM-16 → 16 × STM-1 → 84 × DS1
- 16 × STM-1 in each STM-16 ITU-T G.70716 × STM-1.
- 84 × DS1 in each STM-1 ITU-T G.70784 VC-11 tributaries: 3 TUG-3 × 7 TUG-2 × 4 TU-11.
- 16 STM-1s
- 16 × 84 = 1,344 DS1s
Leftover capacity
413.184 Mbit/s of each STM-16 line rate (2.488320 Gbit/s) sits outside 1,344 × 1.544 Mbit/s of DS1 line rate (2.075136 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 1,611.6, which floors to 1,611 DS1s by bit rate only. The standard mapping is 1,344. Use the mapping.