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

[Alan Su]

Hi Ryan,

Many thanks for your sharing, I'll check if the PBX can act as H.323 GW or
not. ^^


Regards/Alan


2006/6/23, Ryan Ratliff <rratliff at cisco.com>:
>
> 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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>
>
>
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