Is it possible to add a custom IP phone in the free SMB version? We have a new door access system which is a SIP client that we want to connect as an extension to our 3CX SMB Free edition. When clicking on adding a new IP p[hone for the extension, the router phone/sbc option is greyed out. Is...
I have a sip trunk which has IP based authentication and not registration based. Is it possible to configure a SIP trunk without the userid and password? I have been able to create a sip trunk to an unsupported provider before using registration based authentication without any problems.