[Serusers] sip to h323 gateway ...

Hi, I know, a bit off topic ... but i am sure people here have the expertise, so :) I am facing a request to bridge a sip network and an h323 network. I would like to operate the sip with ser as the proxy and some gatekeeper on the h323 side (not required though). The question is ... what should i use to bridge the two networks? - asterisk - yate - vovida -> vocal Any others? comments? Ideally, the bridge would be only signalling-wise (rtp to be direct end-to-end). But, if someone had bad experience with this and would recommend to use a B2BUA approach, please, tell me. I don't know if it makes a difference, but most of the calls would go from the H323 side to the SIP side ... but i don't really want to restrict SIP->H323. Cesc