Result: standard mapping
How many DS0s are in a DS2?
A DS2 carries 96 DS0s, per ANSI T1.107.
96
DS0s in a DS2
Working
DS2 → 4 × DS1 → 24 × DS0
- 4 × DS1 in each DS2 ANSI T1.107Four DS1s, bit-stuffed up to the 6.312 Mbit/s DS2 line rate.
- 24 × DS0 in each DS1 ANSI T1.10724 payload timeslots. The framing bit adds 8 kbit/s and brings the line rate to 1.544 Mbit/s.
- 4 DS1s
- 4 × 24 = 96 DS0s
Leftover capacity
168 kbit/s of each DS2 line rate (6.312 Mbit/s) sits outside 96 × 64 kbit/s of DS0 line rate (6.144 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 98.62, which floors to 98 DS0s by bit rate only. The standard mapping is 96. Use the mapping.