Hi All,

I’m new to freeswitch and I’m investigating if i can use FS as SBC.

I see that one can use FS as SBC for incoming and outgoing calls.

But I was not able to find out if FS can be used for registration… I mean the subscriber from internet should send Register to FS, and FS should send Register to internal sip server. Is this possible?

Another question is: what will happen with “contact parameters” in Invite and Register messages? Will FS pass unknown parameters through?

I’m interested in particular in the following Contact field:

Contact: <sip:+79980000004@10.169.10.64:5070;transport=udp>;+g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel,urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel.gsma.videocall";audio;video;q=0.8;+g.oma.sip-im;+g.oma.sip-im.large-message;expires=3600

If FS will get Invite or Register from Internet with such Contact, is it possible to preserve parameters (namely  +g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel,urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel.gsma.videocall";audio;video;q=0.8;+g.oma.sip-im;+g.oma.sip-im.large-message;expires=3600) on the internal call leg?

Thanks in advance,

Nikolay.