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Call flow CCM with Gatekeeper

Hi, I have several clusters of Call manager and want to put a GK to route between clusters.

Anyone has call flows to know what happens exactly ?

For example, is the GK check that the other CCM available before giving the route to first CCM ?

Thanks.

1 REPLY
Green

Re: Call flow CCM with Gatekeeper

Hi,

GK

RAS

Cluster1 H225/H245 Cluster2

GK will use RAS messages before proceed with the call.

1. Phone1 in CCM1 dials a Phone2 in CCM2

2. CCM1 sends an ARQ to GK

3. GK sends an ACF with CCM2 IPaddr to CCM1

4. CCM1 sends a H225 message to CCM2

5. CCM2 sends a ARQ to GK

6. GK sends an ACF to CCM2 (GK check available resources, if succesful sends the ACF, if not the ARJ)

7. CCM2 should proceed H225

8. CCM1|CCM2 interchange H245

9. Phone1 and Phone2 are connected now.

You may use Route Lists (Including PSTN GWs and ICT) in CCM to use alternate routes in case of WAN failures.

http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_implementation_design_guide_chapter09186a0080447501.html#wp1043988

HTH

//Gonzalo

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