SIP trunking is a way to connect an on-premise IP phone system or a legacy phone system via VoIP gateway to a VoIP service provider.
You will need one channel for each concurrent phone call. It is best to base this number on peak times when most of your users are on the phone. For example, if during peak time hours your business uses 10 lines, you require 10 channels.
T.38 faxing protocol is guaranteed for all outbound calls with the 2-Way SIP Trunk with T.38 pricing plan.
