[cisco-voip] CallManager Handle Call Routing with PBX interoperability

[Ryan Ratliff]

I've no experience with a sip trunk to a PBX I'm afraid.

I have seen some PBXs that could act as an H.323 gateway to CM.  IIRC  
the only trick was to make sure "MTP Required" was set due to H.323  
version issues.

-Ryan

On Jun 22, 2006, at 1:48 PM, Alan Su wrote:

Hi Ryan,

Yes, I've tried to use IOS MGCP gateway and it worked. But it will  
occupy the channel between GW-PBX. For example, extension 1315 & 1316  
are PBX analog phone, if I transfer all calls from PBX to GW and then  
to CCM for call routing, even those 2 extensions will occupy the  
channel for in/out calls. Unless I configure all the analog  
extensions in PBX and forward others to GW. However, it'll cause  
other issues such as when I dialing 1315xxxx for off-net call, the  
PBX will treat it as 1315 extension. Because the PBX can be upgraded  
to IP-based, so I was wondering is there any solution like SIP-trunk  
can solve the issue. Thanks a lot ~


Regards,

Alan


2006/6/23, Ryan Ratliff <rratliff at cisco.com>: Basically you'll need  
some type of voice gateway to receive calls
from the PBX (via PRI or other physical link) and send them to the
CM.     Once the call hits the CM it gets routed normally to a phone,
route pattern, etc.

-Ryan

On Jun 22, 2006, at 1:24 PM, Alan Su wrote:

Dear All,

I have a question about the PBX interoperability with CCM. What can I
do to make CCM to handle all the call routing even for the PBX end-
phone?
One of the solution I heard about is to use SIP trunk connecting with
CCM & PBX, but I'm not quite sure how to do that. Any suggestion or
comment would be very grateful. Thanks.


Regards,

Alan
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