[cisco-voip] what makes a call with Gatekeepers

[wayne.j.jackson at uk.bnpparibas.com]

We have a potential set up with GK`s and CCM so to have voice zones for 
bandwidth control 

HandsetA>>>>>CCMA>>>>>>>>GK>>>>>>>>>CCMB>>>>>>>>>>.HandsetB


When a call flow is set up using the above, I understand the call flow is 
peer to peer Handset A to HandsetB. CCM sends a RAS message to the  GK and 
the GK resolves the address and replies back with the IP address for calls 
across the WAN

Now Gateways are introduced as we need to set up a different zones for 
Video calls so to control bandwidth for them.  We will create a new route 
Pattern which only video devices have access to with a RAS target of the 
GK- this allows us to create two zones from the same CCM 1 x Voice, 1 X 
Video 

HandsetA>>>>>>>>CCMA>>>>GWA>>>>GK>>>>>GWB>>>>CCMB>>>>>>>>>>.Handset B

We need to enforce different QOS setting for Video devices to voice 
devices, we will use CIPC with Video which are on our data network.We 
don`t want to have complicated/large ACL`s 

We need to enforce QOS, DSCP marking on IP  Commutators, is there a 
setting on CCM for CIPC only ? can we make use of the "VIDEO" GW so to 
route calls out on this GW/ Interface after the RAS reply so that only 
video based calls will use this GW so enforce a blanket QOS policy at the 
interface ?  Voice calls still peer to peer


thanks
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