Call Manager and CAC in MPLS

[RICHARD MESSINGER]

In reading over the SRND for Call Manager 4.0, there is the basic Call Admission Control based on Locations and the topology of a hub and spoke connections.

Then it states that in an MPLS WAN, the CAC needs to be done at the remote locations since the remotes are directly connected to each other at layer 3. Then it just stops with no explaination or pointers to how this can be done.

I have been poking around some more and it looks like if the routers are also MGCP gateways, there are CAC parameters that can be used to control calls. The next question is how do these parameters and control get relayed back to Call Manager so that the calls can travel the correct path when we have this meshed WAN?

Pointers to documents or examples are appreciated.

[MARTIN STREULE]

Just use the "locations" in CCM for every site in a MPLS topology.

Don't use the "blank" location for any device - meaning configure the location parameter also for devices in the same LAN as the CCM.

There a a bunch of bugs coming for free with Locations (problems with shared lines, counters drift away, ...) - but in our project it works quite good.