This is not a SIP tutorial, only an overview on the issues that impact remote SIP phones on any iPBX. When you set up a SIP call between two end points, there are upwards of four “holes” that might need to be punched in your firewall for the phone call to work properly. Clearly, there is the entire process of registering a remote phone and the process of setting up a phone. Once these events have been negotiated ...
For ShoreTel Support... Read the entire article on ShoreTel SIP Mobility Router & the Firewall on DrVoIP VoIP Blog.
For ShoreTel Support... Read the entire article on ShoreTel SIP Mobility Router & the Firewall on DrVoIP VoIP Blog.