Specify Caller ID for Each Call with PJSIP Library

Introduction

is an well known open-source library developed by under GPL or commercial license and implementing the Session Initiation Protocol (SIP) stack. It is written in C and it is available on all major operating systems (e.g. macOS, Linux, Windows, Android, iOS). Its primary use is in VoIP applications based on SIP and Real Time Protocol (RTP). PJSIP library is also one of the SIP stacks used by