在ip电话或者视频通讯开发中，常常需要穿越nat，stun是个不错的选择...

Vovida出品的包括RTP、RTCP、SIP等各种基础协议栈和SIP UAC、UAS等功能的IP电话服务器端程序。编译环境为linux-Vovida produced in RTP, RTCP, and other SIP based protocol stack and SIP UAC and UAS capabilities of IP telephony server procedures. Linux compiler environment

QtPhone is a cross-platform telephone emulation application designed to be used with a PC, speakers, microphone, V.92 voice modem and a standard phone line. ISDN, xDSL and VoIP will be supported. Features include Caller Identification and Voice Mail. -QtPhone is a cross-platform telephone emu IBM application designed to be used with a PC , speakers, microphone, V.92 voice modem and a standard phone line. ISDN , xDSL and VoIP will be supported. Features inc lude Caller Identification and Voice Mail.

一个基于H.323的视频会议终端，基于OPEN H323协议，实现了视频和音频的通信，支持H.263。适合研究OPEN H323的开发者参考。-H.323-based video conferencing terminals, based on the OPEN H323 agreement, realize the video and audio communications to support H.263. Appropriate to study the development of OPEN H323 reference.

RFC文档中有关SIP协议的，3261，3264，3428，3265，2327，2543，大部分都是中文的，还有中华人民共和国通信行业标准中有关SIP的标准。-RFC documentation of the SIP, 3261,3264,3428,3265,2327. 2,543, most of whom are Chinese, there is the People"s Republic of China telecommunications industry standards on the SIP standard.

gnugk-2.2.1-2-win32-x86

JRTP最新源码 不错的RTP实现 IETF RFC 3550.-The latest source JRTP good RTP realize IETF RFC 3550.

在开发 VoIP 系统时，主要考虑的一个方面就是连接到模拟电话的接口。设计人员必须了解 PSTN 中存在的电话接口要求，因为它们必须在 VoIP 系统中得到支持。本文将重点介绍连接到标准 POTS 电话的两种最常用接口：Foreign eXchange Subscriber (FXS) 与 Foreign eXchange Office (FXO)。重点说明了设计人员在为 VoIP 小区网关的模拟电话接口提供支持时可能面临的某些挑战。-In the development of VoIP system, one aspect of the main considerations is connected to the analog telephone interface. Designers must understand the existing PSTN telephone interface requirements, because they are in the VoIP system must be supported. This article will focus on the standard POTS telephone connected to the two most commonly used interface: Foreign eXchange Subscriber (FXS) and Foreign eXchange Office (FXO). Focusing on the design staff in the Residential Gateway for VoIP analog telephone interface may provide support to some of the challenges faced.

网络电话例程，可以连接本机做测试！--Network telephone example, and it can connect to local machine to do a test!

The Auerswald ETS 4308i ISDN PBX Reverse Engineering Project是一种完全开放式的源客户端软件适用于the Auerswald ETS 4308i ISDN PBX。它的目的是为有效地使用LCR-feature of the PBX 提供工具，为改换PBX的配置，为读取电话数量，为将ISDN-D-channel-protocol of the PBXzuop作为输入源或者isdnlog来使用。-ETS 4308i ISDN PBX Reverse Engineering Project is a completely open-source client software applicable to the George Mason ETS 4308i ISDN PBX. It is designed for the effective use of LCR-feature of the PBX with the tools to change the configuration of PBX, telephone number for readers to be ISDN-D-channel-PBXzuop protocol of the input source or isdnlog to use it.

视频会议编码传输，视频编解码与传输的Demo程序,-transmission coding video conferencing, video codecs and transmission Demo procedures,