I am working with a company that has OCS for IM and an Avaya IP PBX for voice. We want to enable all corporate email addresses to ring the phones when called by URI from another SIP desk phone. Currently the DNS SRV records for SIP point to the OCS server so callers can IM to employees by email address, so all SIP invites go to the OCS server.
Is it possible to configure the OCS server to redirect (or pass on) SIP invites for voice to the Avaya switch, or do I need to front-end them both with a proxy or redirect server, or is there some better solution (other than using the OCS server for voice)?
Or is it possible for DNS to have separate SRV records for SIP/voice and SIP/other?
Thanks.