Hi there am having an issue with digital modems disconnecting on a cisco 2811. The router has PVDM2-36DM card and hwic-1ce1t1-pri E1 interface installed.
The E1 is up and I can dialout but the calls drop after 24-30 secs.
I have issued the debug modem csm and the following output is shown.
ebug modem s csm
Modem Management Call Switching Module debugging is on
Dial_SRV#
*May 16 12:13:37.495: Modem 0/322 CSM: received ASYNC_DTR_UP for line 322
Dial_SRV#
*May 16 12:13:40.455: CSM: csm_modem_event called
*May 16 12:13:40.455: Modem 0/322 CSM: Called Number Rcvd = 07879605414
*May 16 12:13:40.455: Modem 0/322 CSM: Dial String to be processed (07879605414)
*May 16 12:13:40.455: Modem 0/322 CSM: End of Dial String
*May 16 12:13:40.455: Modem 0/322 CSM: (CSM_PROC_IDLE)<--MODEM_DIAL_OUT
*May 16 12:13:40.483: CSM: csm_modem_event called
*May 16 12:13:40.483: Modem 0/322 CSM: (CSM_PROC_OC_ISDN_PROCESSING_CALL)<--CSM_EVENT_MODEM_SETUP
*May 16 12:13:40.627: CSM: MODEM_REPORT from 0/0/0:11, call_id=0x800A, event=0x3, cause=0x0, dchan_idb=0x462427A0
Dial_SRV#
*May 16 12:13:40.627: Modem 0/322 CSM: (CSM_PROC_OC_ISDN_PROCESSING_CALL)<--ISDN_BCHAN_ASSIGNED
Dial_SRV#
*May 16 12:13:45.443: %ISDN-6-CONNECT: Interface Serial0/0/0:11 is now connected to 07879605414 N/A
Dial_SRV#
*May 16 12:13:45.443: CSM: MODEM_REPORT from 0/0/0:11, call_id=0x800A, event=0x4, cause=0x0, dchan_idb=0x462427A0
*May 16 12:13:45.443: Modem 0/322 CSM: MODEM_REPORT rcvd DEV_CONNECTED for call_id 0x800A
*May 16 12:13:45.443: Modem 0/322 CSM: (CSM_PROC_OC_ISDN_CONNECT_PENDING)<--ISDN_CONNECTED
technolog_Dial_SRV#
*May 16 12:13:59.851: CSM: csm_modem_event called
*May 16 12:13:59.851: Modem 0/322 CSM: (CSM_PROC_WAIT_FOR_CARRIER)<--MODEM_CONNECTED
Dial_SRV#
*May 16 12:14:09.903: Modem 0/322 CSM: (CSM_PROC_CONNECTED)<--ASYNC_DTR_DOWN
*May 16 12:14:09.983: CSM: csm_modem_event called
*May 16 12:14:09.983: Modem 0/322 CSM: (CSM_PROC_DISCONNECTED)<--MODEM_DISCONNECTED
*May 16 12:14:09.983: Modem 0/322 CSM: Stopping dm tone timer
*May 16 12:14:09.987: Modem 0/322 CSM: (CSM_PROC_DISCONNECTED)<--QUEUED_DISCONNECT
*May 16 12:14:09.987: Modem 0/322 CSM: Stopping dm tone timer
*May 16 12:14:09.987: Modem 0/322 CSM: CSM_MODEM_DEALLOCATE: modem is deallocated
*May 16 12:14:09.987: CSM: called_party_num '07879605414'
*May 16 12:14:09.987: Modem 0/322 CSM: (CSM_PROC_IDLE)<--ASYNC_DTR_DOWN
*May 16 12:14:09.987: %ISDN-6-DISCONNECT: Interface Serial0/0/0:11 disconnected from 07879605414 , call lasted 24 seconds
Dial_SRV#
*May 16 12:14:10.063: CSM: csm_modem_event called
*May 16 12:14:10.063: Modem 0/322 CSM: (CSM_PROC_IDLE)<--MODEM_DISCONNECTED
*May 16 12:14:10.151: CSM: MODEM_REPORT from 0/0/0:11, call_id=0x800A, event=0x0, cause=0x0, dchan_idb=0x462427A0
*May 16 12:14:10.151: CSM: MODEM_REPORT rcvd DEV_IDLE for call_id 0x800A, modem not found due to wrong b channel number or b channel is deallocated
*May 16 12:14:10.987: Modem 0/322 CSM: received ASYNC_DTR_UP for line 322
Dial_SRV#
What stands out is the following line 'modem not found due to wrong b channel number or b channel is deallocated'
I have attached the full config and in it I have configured the time-slots 1-12,16 This is because the organisation does not have the full E1 but only first 12 channels 16 is the d channel.
Any assistance would be much appreciated
Thanks
