Query regarding call flow between sites

Unanswered Question
Jan 30th, 2008
User Badges:

dear Experts,


please help to clarify doubt.

Three sites are interconnecting to a single MPLS cloud. and i am referring them as Site A,B and C


Site A is my main site with cisco call manager installed.


if site B needs to call Site C:


Site B user will dial the extension it would be recieved by call manager at site A , CM will place the call

to site C. After call establishment for voice call bandwidth would be used from SITE B to C directly

through MPLS cloud OR bandwidth will be used from Site B to A and then from A to Site C.


rgds,magesh

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Loading.
Zin.Karzazi Wed, 01/30/2008 - 11:24
User Badges:
  • Silver, 250 points or more

The Callmanager is responsible only for Signaling not for the voice path (RTP). Before the CCM connect the to Partys, he will give the IP Address of C to B, so they can have the Voice Path set between them (or more precisely between the Gateways on those sites).


What i would recommend, is to use a sniffer (ethereal the best) to sniff traffic from your PC connected to your Phone, while you are making the Call. You will get the whole picture of what s exactly happening (sccp/RTP)


HTH

Actions

This Discussion