analisys and translation of the redirecting number in IOS

Unanswered Question
Dec 18th, 2008

Hi All,

When the PSTN provider redirect their DDI numbers in case of emergency to another bearer they simply send all redirected DDI numbers to the main number associated with this new bearer. So at the end we have a picture as in the bit of the Q931 trace below

Component = Invoke component

Invoke Id = 16384

Operation = Diversion Leg2

Calling Party Number i = 0x2183, '7973715225'

Plan:ISDN, Type:National

Called Party Number i = 0x81, '179741'

Plan:ISDN, Type:Unknown

*Dec 18 11:54:06.611: ISDN Se0/0/0:15 Q931: Received SETUP callref = 0x8001 call ID = 0x0067 switch = primary-net5 interface = User

*Dec 18 11:54:06.611: ISDN Se0/0/0:15 Q931: extract_redirect_orig_called_ie: IE type redirecting num 2071052200 reason 15 cnt 1 plan 2 type 1 pres 0

*Dec 18 11:54:06.631: ISDN Se0/0/0:15 Q931: TX -> CALL_PROC pd = 8 callref = 0x8001

In this trace the called number 179741 is the last 6 digits of the main number of the new bearer and the bit “type redirecting num 2071052200” is the actual DDI that has been dialed and redirected. So all 300 DDIs for this customer have a single called number in the case of the PSTN provider redirection, with the actual DDI dialed shown only in the IE. The PSTN provider says this is exactly how it should be and that Cisco equipment should be able to extract the correct DDI out of the IE and send the call to the correct extension.

Does anybody know if Cisco 2811 gateway with c2800nm-spservicesk9-mz.124-20.T IOS on it can do this at all? I have had a look through different IOS commands and parameters but I simply could not find any way to look into IE for the redirected number, ignore the actual called number and replace it with the translated redirected number. Has anybody done this before? Is it possible? Or is the PSTN provider simply bluffing? Any advice will be really appreciated.

Thanks a lot.

I have this problem too.
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jonathan.dixon Fri, 05/15/2015 - 01:45

Digging up an really old thread here but we have a similar issue - does anyone know if this is possible?

Only way I can think of doing it could be with SIP profiles on the gateway, extracting the redirect called number and modifying the INVITE towards CUCM.

Does anyone know of another way?


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