User=phone in the INVITE

Hello,

Our voip partners asked for sending INVITE messages with inserted user=phone parameter.

The meaning of user=phone is to specify that the user-part of the URI should be interpreted as a telephone number (tel-URI).

Yeti has no option adding this parameter in the header, so we tried adding it on legA server.

The INVITE to YETI is sent with user=phone
INVITE sip:16#443068466366@X.X.X.X:5060;transport=udp;user=phone SIP/2.0

But after yeti iniciate the call to partners gateway, the parameter is removed.

INVITE sip:16#443068466366@Y.Y.Y.Y:5060 SIP/2.0

Any idea how to add it or skip from removing?

Thanks for answer.

Currently it is not implemented. If you interested in this feature development - contact me in DM.

Looks like I was wrong - there is sip schema configuration in termination gateway: