A PC, a router, 50 smartphone without SIM card, how to design for the 50 smart phone calls, and bosses to help

CodePudding user response:

Using similar to QQ, WeChat chat tools, can use the Internet server, can also with the aid of self-built server,

CodePudding user response:

IP phone, write a program to do voice over IP

CodePudding user response:

Computer with the virtual machine install sip server terminal sip software installed to register on the phone