PRI ISDN Message Types

ISDN Message Types

Following are possible ISDN message types:

Call Establishment

000 00001 Alerting

000 00010 Call Proceeding

000 00011 Progress

000 00101 Setup

000 00111 Connect

000 01101 Setup Acknowledge

000 01111 Connect Acknowledge

Call Information Phase

001 00000 User Information

001 00001 Suspend Reject

001 00010 Resume Reject

001 00100 Hold

001 00101 Suspend

001 00110 Resume

001 01000 Hold Acknowledge

001 01101 Suspend Acknowledge

001 01110 Resume Acknowledge

001 10000 Hold Reject

001 10001 Retrieve

001 10011 Retrieve Acknowledge

001 10111 Retrieve Reject

Call Clearing

010 00101 Disconnect

010 00110 Restart

010 01101 Release

010 01110 Restart Acknowledge

010 11010 Release Complete

Miscellaneous

011 00000 Segment

011 00010 Facility

011 00100 Register

011 01110 Notify

011 10101 Status inquiry

011 11001 Congestion Control

011 11011 Information

011 11101 Status