ISDN Interface
Bit pipe supports multiple channels interleaved by TDM. Standard channels are
- A 4kHz analog telephone channel
- B 64kbps digital PCM channel or voice data
- C 8 or 16 kbps dig. channel for out of band sig.
- D 16 kbps dig. chan for out of band signaling
- E 64 16 kbps dig. channel for ISDN signaling
- H 384, 1536, 1920 kbps digital channel