Hello ML. My first post here. I'm based out of India.
Have a doubt regarding Voip system. Client has an single PRI line and a Siemens PABX system. Currently internal calls are charged by the telco. They would want to cut down this cost, hence exploring Voip for communications.
If an IP PBX like Asterisk/Freepbx is used along with IP Phones, would internal calls still be charged? I'm confused on this part since I would still be assigning the DID numbers from the PRI lines to the extensions.