Configuring The D Channels For Isdn Signaling - Cisco VGD-1T3 Software Configuration Manual

Basic Configuration Using the Command-Line Interface on the Cisco VGD 1T3 Voice Gateway
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If you are having trouble:
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Configuring the D Channels for ISDN Signaling

The ISDN D channels carry the control and signaling information for your ISDN calls—for both
circuit-switched data calls, and analog modem calls.
%Q.931 is backhauled to CCM MANAGER 0x0003 on DSL 0. Layer 3 output may not apply
ISDN Serial4/0:1:23 interface
dsl 0, interface ISDN Switchtype = primary-ni
L2 Protocol = Q.921 0x0000
Layer 1 Status:
ACTIVE
Layer 2 Status:
TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
Layer 3 Status:
0 Active Layer 3 Call(s)
Active dsl 0 CCBs = 0
The Free Channel Mask:
Number of L2 Discards = 0, L2 Session ID = 4
%Q.931 is backhauled to CCM MANAGER 0x0003 on DSL 1. Layer 3 output may not apply
Note the following information for Serial 4/0:1:23 (the first half of the messages):
Layer 1 Status should be "Active."
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Layer 2 Status should be "Multiple_Frame_Established." (It might take several seconds for
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Layer 2 status to appear.)
Layer 3 Status should be "0 Active Layer 3 Call(s)."
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The second half of the messages displays information for Serial 4/0:28:23.
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Monitor ISDN channels and service by entering the show isdn service command:
Router# show isdn service
PRI Channel Statistics:
%Q.931 is backhauled to CCM MANAGER 0x0003 on DSL 0. Layer 3 output may not apply
ISDN Se4/0:1:23, Channel [1-24]
Configured Isdn Interface (dsl) 0
Channel State (0=Idle 1=Proposed 2=Busy 3=Reserved 4=Restart 5=Maint_Pend)
Channel : 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4
State : 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3
Service State (0=Inservice 1=Maint 2=Outofservice 8=MaintPend 9=OOSPend)
Channel : 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4
State : 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2
%Q.931 is backhauled to CCM MANAGER 0x0003 on DSL 1. Layer 3 output may not apply
Make sure the cable connection is not loose or disconnected if the Layer 1 Status is "Deactivated."
This status message indicates a problem at the physical layer.
There may be a problem with your telco, or the framing and line code types you entered may not
match those of your telco. A Layer 2 error indicates that the gateway cannot communicate with the
telco. There is a problem at the data link layer.
L3 Protocol(s) = CCM MANAGER 0x0003
0x807FFFFF
Cisco VGD 1T3 Voice Gateway Software Configuration Guide

Configuring the D Channels for ISDN Signaling

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