Nortel, I was querying the group on Nortel knowledge about nortel voip solutions. I am from the Voip Carrier market and not from an enterprise environment so please excuse me if I miss something in my question.
In a voip solution featuring Nortel equipment, Nortel call manager, Voip phone and a nortel PBX with an ip interface card. Is the call setup between phone and Call manager straight Sip or does Nortel use anything proprietary for call setup? Also in classic setup from a PBX to carrier for offnet calls, is barrier channel setup coordinated via the call manager(mgcp). I am not quite understanding call flow.
For example, in a voip softswitch solution in a carrier type cms/call manager, Sip phones communicate via Sip to the callmanager for call setup, the Barrier channel setup is done between the media gateway controller and the cms, I am trying to just understand is their a difference with Nortel enterprise solution. If anyone has Cisco enterprise experience could you please respond as well.