Cause 41 on ISR4321 with BRI

[akram.root]

I have a cucm 12.5 integrated with gateway isr 4321 on H.323 , in this gateway i have a ISDN (BRI).

The problem happens , sometimes , sometimes not

when the problem happen it give the cause value  41 (Cause Value=41, Call Entry(Responsed=TRUE, Cause Value=41)

and i can hear the message of cucm : "your call cannot be routed".

You find in attachement the debug .

Best regards 

[Nithin Eluvathingal]

Are you sending the right numbers to ISP ? I can see from the debug 

Called Number=*0638884592 and Called Number=#0638884592.

[akram.root]

yes , because i use those dial peer :

dial-peer voice 11 pots
description utliser pour les appels vers National avec #
destination-pattern #0[567]........$
progress_ind setup enable 3
progress_ind alert enable 8
direct-inward-dial
port 0/2/2
prefix 0

dial-peer voice 13 pots
description utliser pour les appels vers National avec *
destination-pattern *0[567]........$
progress_ind setup enable 3
progress_ind alert enable 8
direct-inward-dial
port 0/2/3
prefix 0

Best regards 

[Leo Arias]

Cause code 41 indicates Temporarily Unavailable. Typically happens when you experience a network issue or sudden disconnection on the call path. 

Your BRI interface seems to be flapping:

May 7 13:03:23.275: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/2/2:0, TEI 69 c hanged to up

May 7 13:03:23.462: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0/2/2:0, TEI 69 changed to down

Then you immediately see the disconnection, so my guess is the flapping of the interface is causing the problem. 

May 7 13:03:23.463: //18373/00654599F80F/CCAPI/cc_api_call_disconnected:

Cause Value=41, Interface=0x7FDC3E1C9B48, Call Id=18373

[akram.root]

Thank you for your reply .

What do you suggest to me for solving this issue

Bes regards 

[Nithin Eluvathingal]

sh controllers e1/t1 will give more informations. You can issue the command  clear counters and see if the values increment. Based on the error you may need to contact service provider and also you need to review  your configuration.

[akram.root]

Thank you for your return   i have a BRI not a E1.

Best regards 

[akram.root]

Here you can find in attachment the output of the interfaces BRI.

Best regards

[Nithin Eluvathingal]

Open ticket  with your provider. 

[akram.root]

Provider telco or cisco tac ?

Best regards 

[Nithin Eluvathingal]

Contact your telco. 

[Leo Arias]

I would suggest to check first with your provider.

If they don't see any fault on their end, it could be the cable or the card. Change the cable connecting the interface. 

If this is an ISDN link you can enable debugs

debug bri-interface, 

debug isdn q921 and

debug isdn q931

to see if there is any issue reported by the system before the link goes down.