T1 Leased Lines
T1 lines are designed to multiplex 24 voice channels of 64 kbps each
T1 lines use time division multiplexing (TDM)
- Time is divided into 8,000 frames per second
- One frame for each sampling period
- Each frame is divided into 24 8-bit slots
- One for each channel’s sample in that time period
- (24 x 8) 192 bits
- Plus one framing bit for 193 bits per frame