Reply To: How many TCH are there in an E-1 31st July 2003 at 21:09 #35647 StubgarGuest Mostafa is correct. 30 voice channels from 32 timeslots x 64kbps (8kHz x 8bits) = 2.048MHz, with TS16 used for CAS (on/off hook condition signalling etc) and TS0 for sync.