[cisco-voip] Cisco IP Phones receiving two calls from CCM 5.1

Andy Saykao andy.saykao at staff.netspace.net.au
Wed Feb 6 00:39:09 EST 2008


Hi there,
 
We are running two Cisco Call Manager 5.1 servers here and need to
integrate this with our current SIP set up which uses PortaBilling. When
external calls come into our SIP gateway (PortaBilling), they are
forwarded to the Cisco Call Managers (CCM). Because we have TWO CCM's
(for redundancy), PortaBilling forwards it to both Call Mananger Server
and we end up with two calls showing up on our Cisco IP Phone PLUS it
takes up two media (dsp) channels. 
 
Is there something that can be done from either Porta or on the Cisco
Call Manager to prevent this from happening so we only receive one call?
Maybe clustering of the CCM's???
 
Anyone help would be greatly appreciated.
 
Thanks.

Andy


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