SIP Trunks for very old IP Office

[ovaquero]

The customer has a very old 8.0 (16) IPO V2. We are trying to provision new SIP trunk service.
We need to present the Internal IPaddress of the IPOffice 10.13.195.X

Currently
From: "BusinessManager" <sip:6441234567@10.20.60.1>;tag=224cc99bb42c32f1
To: <sip:642102347507@10.20.60.1>;tag=1930214972

SIP Tx: UDP 10.13.195.189:5060 -> 10.20.60.1:5060
OPTIONS sip:Unknown@10.20.60.1 SIP/2.0
Via: SIP/2.0/UDP 10.13.195.189:5060;rport;branch=z9hG4bK6a83a1e5c5bb27d0634c49d53ee820bb
From: <sip:Unknown@10.20.60.1>;tag=ecc05165be231789
To: <sip:Unknown@10.20.60.1>

It has to be:
From: "BusinessManager" <sip:6441234567@10.13.195.189>;tag=224cc99bb42c32f1
To: <sip:642102347507@10.20.60.1>;tag=1930214972

SIP Tx: UDP 10.13.195.189:5060 -> 10.20.60.1:5060
OPTIONS sip:Unknown@10.20.60.1 SIP/2.0
Via: SIP/2.0/UDP 10.13.195.189:5060;rport;branch=z9hG4bK6a83a1e5c5bb27d0634c49d53ee820bb
From: <sip:Unknown@10.13.195.189>;tag=ecc05165be231789
To: <sip:Unknown@10.20.60.1>


the challenge is the version so old. You help will be highly appreciated.

 

[derfloh]

You can enter it as SIP domain.