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PJSIP是一个开放源代码的SIP协议栈，它支持多种SIP的扩展功能 。它的实现是为了能在嵌入式设备上高效实现SIP/VOIP。-PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. It combines sign

非常好的软电话，用来学习和应用都不错！非常完善了已经。(This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your optio