My 2 cents.... The final sentence included "(in IMS context)". It should be noted that MGCP does not exist in IMS, and IMS does not use the term Call Agent as such. H.248 (Megaco) is the IMS distributed architecture protocol. MGCF, BGCF, and CSCF functions are typical IMS functions that could combine to make up a softswitch.
Cheers! -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Paulo de Arruda Borelli Sent: Tuesday, October 25, 2005 5:56 PM To: [EMAIL PROTECTED]; [email protected] Subject: RE: [Sip-implementors] SIP/MGCP doubts Hi, Can you detail a little bit more what you are doing? QoS is related to media. But SIP and MGCP relate to call signaling. They do share a common protocol for negotiating the media part (SDP). But it's not still clear what you really need to do. Anyway, in short, the softswitch should have a call processor layer that will control the SIP Proxy and the MGCP Call Agent. After receiving an INVITE, the SIP Proxy would tell the call processor layer that there's a call to be placed. If this call will be routed to an MGCP endpoint, the call processor layer will tell the MGCP Call Agent to select an appropriate channel (which could be selected by a routing processor inside the softswitch). The MGCP Call Agent would then send an "Add" to the MGCP endpoint (two "Add's" in fact, requiring the selection of the desired permanent termination and also an ephemeral termination (RTP)). There are many more details and the above is more suited to MEGACO, and not exactly MGCP. But they are similar and this should help. Regards Paulo Borelli. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Tuesday, October 25, 2005 10:32 AM To: [email protected] Subject: [Sip-implementors] SIP/MGCP doubts Greetings I'm a SIP/MGCP implementor.I'm a project about VoIP's QoS,and I have some doubts about the interface SIP/MGCP: What kind of messagens(SIP messages) the calls agents exchange? How SIP messagens are translated to MGCP messages, in the Call Agent(in IMS context)? Many thanks? _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
