The Care and Feeding of ISDN4BSD
previous up next
2.2.1 Frame format on 2 What is ISDN 2.3.1 D-Channel Layer 2



2.3 The D-Channel

To transmit signaling information in an orderly, error corrected way, some sort of protocol is needed. And where protocols come into play, protocol layers are not far away.

The D-channel uses three layers for communication and because of this you need three different protocols and protocol specifications implemented to transfer signaling information from an ISDN device to an exchange.



Subsections

previous index next

Hellmuth Michaelis 2000-08-30