IPPHone-CCM-MPLS-MGCPGW1-PSTN-55555555(Ext: 1001) | |
Phone no: 22222222
Topology may get garble, hence describing the same as below.
IP Phone and CCM on one side. Two MGCP Gateways across MPLS having PSTN termination. There is point-to-point T1 between both Gateways. One incoming call (55555555) from MGCP GW 1 and one Outgoing Call via MGCP GW 2 (22222222). Now what happens when conference is initiated by IP phone user.
Following is the detailed summary:
G.729 codec on WAN. Two hardware conference bridges, CFB_GW1 and CFB_GW2. MRG has CFB_GW2 as first choice followed by CFB_GW1.
Phone no 55555555 calls ext 1001. Ext 1001 answers the call and presses the conference button. 1001 dials 22222222 via GW2. 22222222 answers the call and 1001 presses conference button and all three are in a conference call.
Question: Which conference bridge would be used here, CFB_GW1 or from CFB_GW2? Once 55555555 drops the call, how signaling and RTP will be flowing between 1001 and 22222222? Both MGCP GW are reachable to each other via point-to-point T1 (not shown in the topology aove).
What if MRG has CFB_GW1 as first choice followed by CFB_GW2?
Any inputs are highly appreciated.