Callmanager 6.1 Publisher, Subscriber 1
CVP A server
voice gateway 2851
Callmanager Subscriber 2
CVP B server
protocol is SIP for all systems.
Agents login to ipcommunicators at side B location and ipcommunicators register to side B subcriber 2. Side B is connected to Side A over WAN i.e, callmanager cluster is distributed over WAN between side A and side B.
Customer calls a tollfree number and lands in side B voice gateway. Welcome prompt is played from CVP B server and when customer opts for agent transfer
call gets transferred to agents at side B thru callmanager subscriber 2. We dont have any issues at side B.
The issue is, when the subscriber 1 or callmanager publisher at side A is switched on, we get a one way audio i.e, caller can hear agent talking but agent does not hear the caller, caller's voice is echoed back to him.
All switch ports and all servers are full duplex and we are able to ping all servers at both locations. When we switch off side A callmanager publisher and subscriber 1 the call flow is fine. Effectively side B seems to run fine but when side A (callmanager publisher and subscriber 1) is switched on we have this one way audio problem.
Both call servers have static route pointing to side B callmanager subscriber 2.
Appreciate your suggestions..