Hi, I would like to have all SIP solution, using sip based ip phones and sip based voice gateways, which sw I would need. If I would use CCM for registering sip phones, do I still need to use Cisco SIP proxy ? Which is the difference in functionality between these two ? Is Cisco SIP proxy SIP based IP PBX ? (as CCM). Can I define voice gateway as SIP based in CCM (I have seen only MGCP/H.323) ? Hope someone can clear this SIP questions to me, thanks
jmiklo