Low-level Supplementary Services Description

[laura113]

Could someone explaine or point to some documentation, that illustrates, in DETAIL, the inner, low-level workings of H323v2 when supp-services are invoked during an intercluster call between 2 CP-79xx phones, each on their own cluster. Include a gatekeeper as well, please! I'm looking for the interaction between the 2 CCM's (Intercluster Trunk), the logical channels, the RTP stream and the 2 phones invloved in the call.

[jpinkus]

I think that you have asked to general of a question, a question that will have a ton of answers. Have you tried first looking at a detailed CCM trace, SDL trace or a sniffer trace.

[laura113]

It might get tons of answers, however I'm only looking for the right one! As for the traces, no I haven't, but what I need is some Cisco documentation for a client (developer), that explains the exact events that take place after a "Transfer", for example is invoked during a conversation. See below...

Location A

Cluster A1

Phone A1

Gatekeeper

Location Z

Cluster Z1

Phone Z1

Phone Z2

Phone A1 is in a Gatekeeper Routed conversation with Phone Z1

Phone Z1 is about to press transfer and connect Phone A1 with Pone Z2

What is the exact interaction amongst the devices...

Intercluster Trunk (ICT)

H.245 Control Channel

Logical Channels

Gatekeeper

Call Managers participating in the ICT

Phones

RTP Stream

Thanks.