[cisco-voip] Gatewaying between SIP and H.323

[Steven E. Ames]

> -----Original Message-----
> From: Blaz Zupan [mailto:blaz at inlimbo.org]
> Sent: Thursday, September 02, 2004 1:23 AM
> To: Steven E. Ames
> Cc: cisco-voip at puck.nether.net
> Subject: Re: [cisco-voip] Gatewaying between SIP and H.323
> 
> 
> > 1. I can't gateway SIP to H.323 with my hardware/IOS. This 
> would be sad but if someone can say its so and maybe point 
> out options?
> 
> Your first assumption is correct. Most IOS versions can not 
> bridge a VoIP call
> to a VoIP call, they can only bridge a VoIP call to a TDM call.

A cisco engineer verified that IP-IP Gateway for SIP isn't available yet and he didn't have a timeframe for it, nor could he say if it would then allow SIP-H.323 bridging or what feature set of IOS it would be available in (IP-IP Gateway for H.323 seems to be only in Enterprise feature set).

Right. Still on this topic... Is it possible to route calls between SIP and H.323 if either SIP Proxy or CCM (4.X to get SIP Support, right?) are in the equation?

SIP_PHONE--->CCM--->H.323_GateKeeper
                --->H.323_Phone

Ditto scenario replacing CCM with Cisco SIP Proxy...

??

-Steve
 
> Some versions allow the following setup:
> 
> voice service voip
>  allow-connections h323 to h323
> 
> I'm not sure it's possible to bridge SIP to H.323 (and vice 
> versa) at all. The
> feature above is present in 12.3T (enterprise feature set 
> only unfortunately).
> For example the following image does have it: 
> c2600-js2-mz.123-8.T.bin. I
> believe the feature is called "Multiservice IP-to-IP Gateway 
> with media
> flow-around". The Feature Navigator at 
> http://www.cisco.com/go/fn/ should be
> able to find it. Other than that, I don't think IOS can do 
> what you want
> (bridge a H.323 call to a SIP call).
>