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

[Blaz Zupan]

> 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.

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).