International call fail to Slovakia

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Dec 13th, 2007
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We have problem with CCM in 4.0(2a)sr1a and H323 GW ( 1760 in 12.3(8)T3 )

We have the same route pattern for all international call.

All international call works excepted call to Slovakia.

In isdn trace, we see this disconnect cause 0x8798.

Do you have more detail about this error?

Please found below a Q931 trace for call to number '0038613206999'

Thanks for your help

Is it very strange problem!



*Mar 8 05:54:06.577: ISDN BR1/1 Q931: TX -> SETUP pd = 8 callref = 0x3B

Bearer Capability i = 0x9090A3

Standard = CCITT

Transer Capability = 3.1kHz Audio

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0x82

Calling Party Number i = 0x0181, '33145627373'

Plan:ISDN, Type:Unknown

Called Party Number i = 0x80, '0038613206999'

Plan:Unknown, Type:Unknown

*Mar 8 05:54:06.626: ISDN BR0/1 Q931: RX <- RELEASE_COMP pd = 8 callref = 0xBA

*Mar 8 05:54:06.726: ISDN BR1/1 Q931: RX <- SETUP_ACK pd = 8 callref = 0xBB

Channel ID i = 0x8A

*Mar 8 05:54:13.224: ISDN BR1/1 Q931: RX <- CALL_PROC pd = 8 callref = 0xBB

Channel ID i = 0x8A

*Mar 8 05:54:13.244: ISDN BR1/1 Q931: RX <- PROGRESS pd = 8 callref = 0xBB

Cause i = 0x87F2 - Unknown cause value

Progress Ind i = 0x8281 - Call not end-to-end ISDN, may have in-band info

*Mar 8 05:54:13.441: ISDN BR1/1 Q931: RX <- DISCONNECT pd = 8 callref = 0xBB

Cause i = 0x8798 - Unknown cause value

*Mar 8 05:54:13.449: ISDN BR1/1 Q931: TX -> RELEASE pd = 8 callref = 0x3B

Cause i = 0x8098 - Unknown cause value

*Mar 8 05:54:13.513: ISDN BR1/1 Q931: RX <- RELEASE_COMP pd = 8 callref = 0xBB

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royalblues Thu, 12/13/2007 - 05:33
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From the ISDN cause codes

87- indicates the international network

98 - Message not compatible with call state or message type non-existent or not implemented

The remote equipment received an invalid message, and no standard cause applies. This cause is due to a D-channel error. If this error occurs systematically, report it to your ISDN service provider



allan.thomas Thu, 12/13/2007 - 06:02
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As part of the call establishment, the debug indicates that the router received a progress message from the International network.

Progress messages are typically requests for additional information in order to complete the call establishment.

In light of the above, I would suggest that you follow this up with your Telco.



Aaron Dhiman Thu, 12/13/2007 - 09:02
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The call in question has callref = 0x3B, so I don't think that the PROGRESS has anything to do with this problem. All that happens with call 0x3B is a SETUP and RELEASE Cause i = 0x8098. Post your config.

gogasca Thu, 12/13/2007 - 10:28
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Based on the SETUP_ACK we are getting they are using overlap sending.

Make sure that we send the flag for overlap sending to that particular location to ON

yxsjwsb Fri, 12/14/2007 - 23:42
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Sebastien, Also it may help to use the gui tool downloadable at It's a demo, the full version comes out next month. It's help me alot in the field

yxsjwsb Sat, 12/22/2007 - 09:59
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The first beta of this PRI debugger had some issues, there's a revised beta posted at now.


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