Trying to register Mitel 5330-5340 phones and it will not register to pbxes.
Phones are in SIP mode, operational, will register to localphone.com, voip.ms, sip.fongo.com. Was going to use PBXes to consolidate all of this under one roof but there seems to be an issue.
I know the phones do register with Anveo so I might have to switch if there is no solution. (I also have C610-IP gigasets working fine with PBXes).
I'd be happy to know if there is a workable solution for the Mitels.