01-07-2009 09:46 AM - edited 03-15-2019 03:22 PM
We got an odd problem. When we dial a couple of external number which starts with 686 prefix, the calls are routed back to our internal numbers. The following is the output of "Debug isdn q931" on our Cisco Voice Gateway.
Jan 7 09:17:37.253 PST: ISDN Se1/5:23 Q931: Applying typeplan for sw-type 0xD is 0x0 0x1, Called num 6860756
.Jan 7 09:17:37.253 PST: ISDN Se1/5:23 Q931: TX -> SETUP pd = 8 callref = 0x54FD
Bearer Capability i = 0x8090A2
Standard = CCITT
Transfer Capability = Speech
Transfer Mode = Circuit
Transfer Rate = 64 kbit/s
Channel ID i = 0xA98395
Exclusive, Channel 21
Calling Party Number i = 0x0181, '7024480148'
Plan:ISDN, Type:Unknown
Called Party Number i = 0x81, '6860756'
Plan:ISDN, Type:Unknown
.Jan 7 09:17:37.405 PST: ISDN Se1/5:23 Q931: RX <- CALL_PROC pd = 8 callref = 0xD4FD
Channel ID i = 0xA98395
Exclusive, Channel 21
.Jan 7 09:17:37.561 PST: ISDN Se2/1:23 Q931: RX <- SETUP pd = 8 callref = 0x06B5
Bearer Capability i = 0x8090A2
Standard = CCITT
Transfer Capability = Speech
Transfer Mode = Circuit
Transfer Rate = 64 kbit/s
Channel ID i = 0xA98383
Exclusive, Channel 3
Calling Party Number i = 0x0180, '7024480148'
Plan:ISDN, Type:Unknown
Called Party Number i = 0x80, '80756'
Plan:Unknown, Type:Unknown
Redirecting Number i = '!', 0x008F, '7026860756'
Plan:ISDN, Type:National
.Jan 7 09:17:37.561 PST: ISDN Se2/1:23 Q931: extract_redirect_orig_called_ie: IE type redirecting num 7026860756 reason 15 cnt -1 plan 1 type 2 pres 0
.Jan 7 09:17:37.577 PST: ISDN Se2/1:23 Q931: TX -> CALL_PROC pd = 8 callref = 0x86B5
Channel ID i = 0xA98383
Exclusive, Channel 3
.Jan 7 09:17:37.621 PST: ISDN Se2/1:23 Q931: TX -> ALERTING pd = 8 callref = 0x86B5
.Jan 7 09:17:37.705 PST: ISDN Se1/5:23 Q931: RX <- ALERTING pd = 8 callref = 0xD4FD
Progress Ind i = 0x8288 - In-band info or appropriate now available
Please take a close look at -
Calling Party Number i = 0x0180, '7024480148'
Plan:ISDN, Type:Unknown
Called Party Number i = 0x80, '80756'
Plan:Unknown, Type:Unknown
Redirecting Number i = '!', 0x008F, '7026860756'
We haved checked the dial-peers on Voice Gateway and nothing is wrong.
Can anyone explain the "IE type redirecting num 7026860756 reason 15" to me please? Thanks in advance!
01-07-2009 10:17 AM
Hello,
Do you have any translation patterns applied in the outbound direction that could be translating 6860756 to 80756?
01-07-2009 10:20 AM
We checked the translation pattern as well.
We have tested the call from non-VOIP phones and got same result. It is more clear to us that there is problem with the carrier. The carrier re-direct the calls back to us.
01-07-2009 10:26 AM
The debug shows the number out to line, telco. Are you sure the telco does not have a translation back to you - what/who is the destination number . Is it all numbers based on the prefix? Could you make for testing purposed the number into a full national and let the telco switch strip of the national part to leave a local number?.
01-07-2009 10:34 AM
This appears to be what is happening:
'6860756' which is also known to the provider as 7026860756 is forwarding your call to '80756'
Unless your provider has given you restrictions on how to dial these numbers, this wouldn't be your problem. You can try changing the 7digit vs 10digit dial, as well as the numbering plan and type.
hth,
nick
01-07-2009 10:42 AM
You are right. The local carrier translate the number from 702686xxxx to 702448xxxx. We have called them for this problem.
Thanks for your help.
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