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mat
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prevent called party number changes on outgoing call to PSTN

Hello Folks,

we have CUCM 9.1 with SIP trunks to cisco 2951 connected to the PSTN either by BRI or PRI module.

we have implemented internal full e.164 (including +) dialplan

when    we do an outgoing call (via SIP trunk and 2951) the phones first  shows   the full e.164 number i.e. +4970366431002. As soon as the call  goes  out  to the PSTN, the display changes to the number format in  which the  2951  sends the call to the ISDN.

Because in  ISDN  there  is no +, the gateway translates the called number to (in  this  example)  70366431002 TON national. and sends this back to CUCM in  the  Session  progress Remote-Party-ID value (see output from debug  on the 2951 below)

how can we prevend that the phone is showing this number instead of the original number?

thanks a lot - mat

debug isdn q931

...

    Calling Party Number i = 0x1081, '497142500290'

        Plan:Unknown, Type:International

    Called Party Number i = 0xA1, '70346431002'

        Plan:ISDN, Type:National

...

debug ccsip  messages:

...

Sent:

SIP/2.0 183 Session Progress

Via: SIP/2.0/TCP 10.1.60.2:5060;branch=z9hG4bK3b5c02cb10b0d

From: <sip:+497142500290@10.1.60.2>;tag=3018449~a209bda8-de62-43dc-9e6a-6ebfafc31bde-46236303

To: <sip:+4970346431002@10.72.2.1>;tag=ED03BF44-10BA

Date: Mon, 02 Sep 2013 12:41:56 GMT

Call-ID: bddc780-22418794-294c3-23c010a@10.1.60.2

CSeq: 101 INVITE

Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY, INFO, REGISTER

Allow-Events: telephone-event

Remote-Party-ID: <sip:70346431002@10.72.2.1>;party=called;screen=no;privacy=off

Contact: <sip:+4970346431002@10.72.2.1:5060;transport=tcp>

...

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