INVITE packet Incompatibility

I have a softswitch ( and encountering problem with Asterisk peering partner. The Asterisk could not make call through to my Softswitch.

When the asterisk send a request to softswitch, the call is not going through. When i captured the ethereal, i found there is UserID appearing in “From” of the INVITE packet, i.e, 12345@

Can we configure to get rid off the 12345@ so that the asterisk only send the IP address, i.e. to my SoftSwitch?

For your kind information, this Asterisk peering partner only using SIP protocol to send calls.

Please help.