ISDN Call Processing Overview

If the call is made using Switched 56 robbed bit signaling (not ISDN), there is an additional waiting period between sending the L4L3mCLEAR_REQUEST and receiving the L3L4mCLEAR_ REQUEST indicating the channel is available. This interval is equal to the value of the guard_interval_timer and is usually 100 ms. Refer to Chapter , Robbed Bit Signaling on page 264 for more information on robbed bit signaling timers.

Network

Module

Host

DISCONNECT

L3L4mDISCONNECT

L4L3mCLEAR_REQUEST

RELEASE

RELEASE COMPLETE

L3L4mCLEAR_REQUEST

Figure 51. ISDN Call Clearing - Initiated by Network

November 2009

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Dialogic 6.2 manual Isdn Call Clearing Initiated by Network, November 326