SIP Contact number changed after the session translation

@103

I used the session translation to change the called number from external session agent before route to internal agent. Can i use the orginal number in Contact field weather than the changed called number before route back to external agent?

 

The translation rule :

 

translation-rules
        id                             Replace_03_to_06
        type                           replace
        add-string                     06
        add-index                      0
        delete-string                  03
        delete-index                   0

 

 

external agent <----------------------> NN4500 <---------------------> Internal agent

(called: 03123456)                              (changed called: 06123456 and route to internal agent)

 

Invite message from external agent:

INVITE sip:03123456@103.170.29.17 SIP/2.0

Via: SIP/2.0/UDP 209.124.67.111:5060;branch=z9hG4bK492sdad240192

From: "7552222222" <sip:7552222222209.124.67.111>;tag=6fd594es748ecc4d1

To: <sip:03123456103.170.29.17>

Contact: <sip:7552222222209.124.67.111:5060>

 

200 OK from internal agent

SIP/2.0