[cisco-voip] TIP: CNAM without requiring MGCP

[Robert Kulagowski]

Zilk, David wrote:
> Many of you have run across the problem of not being able to utilize 
> Caller ID Name (CNAM) information from a telco using H.323.  Since CNAM 
> is provided by most telcos  within the facility IE field, and this isn’t 
> supported in H.323, the solution has always been to convert to MGCP. 
>   If you needed to stick with H.323 or gateway based call routing for 
> other reasons, such as needing to support other H.323 devices, or use 
> TCL scripts, you were out of luck.

Have you tested called call preservation?  What happens if the WAN goes 
down during a call?  Is the call dropped?  That was the biggest reason 
we went to H.323 over MGCP.