ISDN PRI E1 Channel not release

[ROLAND MARTI]

Hi

I've a problem with a couple of ISDN E1 Channel who not release.

If im looking with show voice call summary they are 3 channels are busy. But when i looking with show isdn active there is no active call.

When the CUCM will start a new call and take the blocked channel the user will hear the busy tone.

tcehve#sh voice call summary
PORT           CODEC     VAD VTSP STATE            VPM STATE
============== ========= === ==================== ======================
                
0/0/0:15.15     -          -  -                    
0/0/0:15.17     -          -  -                    
0/0/0:15.18     g711ulaw   n  S_WAIT_STATS          S_TSP_DISC_PROG_IND_REL 
0/0/0:15.19     -          -  -                    
0/0/0:15.20     -          -  -                    
0/0/0:15.21     -          -  -                    
0/0/0:15.22     g711ulaw   n  S_WAIT_STATS          S_TSP_DISC_PROG_IND_REL 
0/0/0:15.23     g711ulaw   n  S_WAIT_STATS          S_TSP_DISC_PROG_IND_REL

tcehve#sh isdn act
--------------------------------------------------------------------------------
                                ISDN ACTIVE CALLS
--------------------------------------------------------------------------------
Call    Calling      Called       Remote  Seconds Seconds Seconds Charges
Type    Number       Number       Name    Used    Left    Idle    Units/Currency
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

Has anyone an idee to fix this problem?

Thanks Roland

[Muthurani Lavanya Paneerselvam]

Hi

Which voice gateway are you using to terminate this ISDN PRI E1 ? also let me know the product details and the call flow.  Thanks

[ROLAND MARTI]

Hi

i would like to explain our design. We have the Cisco 3800 ISR and 2800 ISR Router in service as Voicegateway.

I've more than one Gateway with this problem and it sounds on a Software bug. I have isolate one router to troubleshoot.

The Design is for inbound we use a Gatekeeper for outbound the CUCM have a routepattern.

All Gateways work as H.323 Gateway

I have blocked the good channels. Now i can simulate a fault call. You can see the Channel 23 is used by the Gateway although the channel is occupied.

Here ist the Show version of this router:

tcehve#sh ver
Cisco IOS Software, 3800 Software (C3845-IPVOICEK9-M), Version 12.4(24)T4, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Fri 03-Sep-10 10:00 by prod_rel_team

ROM: System Bootstrap, Version 12.3(11r)T2, RELEASE SOFTWARE (fc1)

tcehve uptime is 8 weeks, 2 days, 4 hours, 29 minutes
System returned to ROM by reload at 08:37:26 MET Mon Feb 14 2011
System restarted at 08:38:56 MET Mon Feb 14 2011
System image file is "flash:c3845-ipvoicek9-mz.124-24.T4.bin"

Cisco 3845 (revision 1.0) with 487423K/36864K bytes of memory.

tcehve#csim start 00583388355
csim: called number = 00583388355, loop count = 1 ping count = 0

csim err csimDisconnected recvd DISC cid(849252)
Apr 13 13:51:50.956: ISDN Se0/0/0:15 Q931: Sending SETUP  callref = 0x3C35 callID = 0xB96A switch = primary-net5 interface = User
Apr 13 13:51:50.956: ISDN Se0/0/0:15 Q931: TX -> SETUP pd = 8  callref = 0x3C35
        Bearer Capability i = 0x8090A3
                Standard = CCITT
                Transfer Capability = Speech 
                Transfer Mode = Circuit
                Transfer Rate = 64 kbit/s
        Channel ID i = 0xA98397
                Exclusive, Channel 23
        Called Party Number i = 0x80, '0583388355'
                Plan:Unknown, Type:Unknown
Apr 13 13:51:51.024: ISDN Se0/0/0:15 Q931: RX <- SETUP_ACK pd = 8  callref = 0xBC35
        Channel ID i = 0xA98397
                Exclusive, Channel 23
Apr 13 13:51:51.468: ISDN Se0/0/0:15 Q931: RX <- CALL_PROC pd = 8  callref = 0xBC35
Apr 13 13:51:51.468: ISDN Se0/0/0:15 Q931: TX -> RELEASE_COMP pd = 8  callref = 0x3C35
        Cause i = 0x80AF - Resource unavailable, unspecified
csim: loop = 1, failed = 1 
csim: call attempted = 1, setup failed = 1, tone failed = 0

tcehve#

tcehve#sh voice call summary
PORT           CODEC     VAD VTSP STATE            VPM STATE
============== ========= === ==================== ======================
            
0/0/0:15.18     g711ulaw   n  S_WAIT_STATS          S_TSP_DISC_PROG_IND_REL 
0/0/0:15.19     -          -  -                    
0/0/0:15.20     -          -  -                    
0/0/0:15.21     -          -  -                    
0/0/0:15.22     g711ulaw   n  S_WAIT_STATS          S_TSP_DISC_PROG_IND_REL 
0/0/0:15.23     g711ulaw   n  S_WAIT_STATS          S_TSP_DISC_PROG_IND_REL

If you use more detail let me know.

Sincerely yours

Roland Marti

[Muthurani Lavanya Paneerselvam]

Hi Roland

Thanks for the info. Its hitting an error " S_TSP_DISC_PROG_IND_REL ". Can you let me know is the channel stuck /hung happening for FAX calls or Normal voice calls ?

Regards

Lavanya

[Muthurani Lavanya Paneerselvam]

Hi

Channel stuck is due to the Error "S_TSP_DISC_PROG_IND_REL" and reported as bug CSCdv61378,CSCdu66815.. But Fix has been committed way back in IOS 12.1 and later images.

So as per my understanding, you shouldnt be hitting this Error in 12.4(24)T4 IOS which you are using currently.

Thanks