exoSIP协议栈及其在软件电话中的应用,适合初学者,基于SIP协议的开发的一个详细的需求分析
上传时间: 2017-07-19
上传用户:三人用菜
Ekiga (formely known as GnomeMeeting) is an open source VoIP and video conferencing application for GNOME. Ekiga uses both the H.323 and SIP protocols. It supports many audio and video codecs, and is interoperable with other SIP compliant software and also with Microsoft NetMeeting
标签: GnomeMeeting conferencing application formely
上传时间: 2014-10-11
上传用户:wmwai1314
A software input panel, a virtual keyboard for windows mobile/PocketPC. It is a undochable floating SIP with only numeric input for calculators etc.. Uses bitmap buttons.
标签: undochable software PocketPC floating
上传时间: 2013-12-26
上传用户:wangchong
RFC2543中文文档,学习SIP编程的基础东东,把这个搞懂,SIP就学会了~
上传时间: 2017-09-11
上传用户:zsjzc
本书是英文版,但内容非常不错,本书目录如下: Table of Contents SIP—Understanding the Session Initiation Protocol, Second Edition Foreword to the First Edition Preface to - the Second Edition Preface to - the First Edition Chapter 1 - SIP and the Internet Chapter 2 - Introduction to SIP Chapter 3 - SIP Clients and Servers Chapter 4 - SIP Request Messages Chapter 5 - SIP Response Messages Chapter 6 - SIP Header Fields Chapter 7 - Related Protocols Chapter 8 - Comparison to H.323 Chapter 9 - Wireless and 3GPP Chapter 10 - Call Flow Examples Chapter 11 - Future Directions Appendix A - Changes in the SIP Specification from RFC 2543 to RFC 3261
标签: 英文
上传时间: 2014-01-06
上传用户:爺的气质
Asterisk SIP 服务器入门资料
上传时间: 2016-11-22
上传用户:sleavgg
Convergence between the two largest networks (Telecom and IP) is taking place very rapidly and at diff erent levels: (1) network level: unifi cation of IP networks with traditional Telecom networks through evolving standards (Session Initiation Protocol (SIP), Realtime Transfer Protocol (RTP), SS7, 3G) to support interopera- bility; (2) service level: traditional Telecom services like voice calls are being provi- sioned on the IP backbone (VoIP), while traditional IP services (most data-driven services such as multimedia, browsing, chatting, gaming, etc.) are accessible over the Telecom network.
标签: Platforms Delivery Service
上传时间: 2020-06-01
上传用户:shancjb
常用芯片DIP SOT SOIC QFP电阻电容二极管等3D模型库 3D视图封装库 STEP后缀三维视图(154个):050-9.STEP0805R.STEP1001-1.STEP1001-2.STEP1001-3.STEP1001-4.STEP1001-5.STEP1001-6.STEP1001-7.STEP1001-8.STEP103_1KV.STEP10X5JT.STEP1206R.STEP13PX2.STEP15PX2.STEP20P插针.STEP25V1000UF.STEP3296W.STEP35V2200UF.STEP3mmLED.STEP3mmLEDH.STEP3X3可调电阻.STEP400V0.1UF.STEP455.STEP630V0.1UF.STEP7805.STEP8P4R.STEPAXIAL-0.2-0.125W.STEPAXIAL-0.4-0.25W.STEPaxial-0.6-2W.STEPB-3528.STEPC-0805.STEPC06x18.STEPCAP-6032.STEPCH3.96 X2.STEPCH3.96-3P.STEPD-PAK.STEPDB25.STEPDC-30.STEPDIP14.STEPDIP16.STEPDIP6.STEPDIP8.STEPDO-214AA.STEPDO-214AB.STEPDO-214AC.STEPDO-41.STEPDO-41Z.STEPFMQ.STEPGNR14D.STEPH9700.STEPILI4981.STEPIN4007.STEPIN5408.STEPJP051-6P6C_02.STEPJQC-3F.STEPJS-1132-10.STEPJS-1132-11.STEPJS-1132-12.STEPJS-1132-13.STEPJS-1132-14.STEPJS-1132-15.STEPJS-1132-2.STEPJS-1132-3.STEPJS-1132-4.STEPJS-1132-5.STEPJS-1132-6.STEPJS-1132-7.STEPJS-1132-8.STEPJS-1132-9.STEPJS-1132R-2.STEPJS-1132R-3.STEPJS-1132R-4.STEPJS-1132R-5.STEPJS-1132R-6.STEPJS-1132R-7.STEPJS-1132R-8.STEPJZC-33F.STEPKBP210.STEPKE2108.STEPKF2510 X8.STEPKF301.STEPKF301x3.STEPKSD-9700.STEPLED5_BLUE.STEPLED5_GRE.STEPLED5_RED.STEPLED5_YEL.STEPLFCSP_WQ.STEPLQFP100.STEPLQFP48.STEPMC-146.STEPmolex-22-27-2021.STEPmolex-22-27-2031.STEPmolex-22-27-2041.STEPmolex-22-27-2051.STEPmolex-22-27-2061.STEPmolex-22-27-2071.STEPmolex-22-27-2081.STEPMSOP10.STEPMSOP8.STEPPA0630NOXOX-HA1.STEPPIN10.STEPPIN24.STEPPIN24A.STEPR 0805.STEPR0402.STEPR0603.STEPR0805.STEPR1206.STEPRA-15.STEPRA-20.STEPRS808.STEPSIP-3-3.96 22-27-2031.STEPSL-B.STEPSL-D.STEPSL-E.STEPSL-G.STEPSL-H.STEPSOD-123.STEPSOD-323.STEPSOD-523.STEPSOD-723.STEPSOD-80.STEPSOIC-8.STEPSOP-4.STEPSOP14.STEPSOP16.STEPSOP18.STEPSOT-89.STEPSOT223.STEPSOT23-3.STEPSOT23-5.STEPSSOP28.STEPTAJ-A.STEPTAJ-B.STEPTAJ-C.STEPTAJ-D.STEPTAJ-E.STEPTAJ-R.STEPTHB6064H.STEPTO-126.STEPTO-126X.STEPTO-220.STEPTO-247.STEPTO-252-3L.STEPTOSHIBA_11-4C1.STEPTSSOP-8.STEPTSSOP14-BOTTON.STEPTSSOP14.STEPTSSOP28.STEPUSB-A.STEPUSB-B.STEPWT.STEP
标签: 芯片 dip sot soic qfp 电阻 电容 二极管 封装
上传时间: 2021-11-21
上传用户:XuVshu
Altium Designer常用器件集成库PCB封装库原理图库3D库元件库集成库原理图器件型号列表:76个13W3 2N7002 74HC0474HC0874HC244D74HC595 74LS138 80508550 8P4R_0603ADM2582EADM3053AS5145B AT24C02BAT54SBUZZ BatteryCCT6806CD4001CD4053CapacitorDS18B20Diode Diode SchottkyFP6101FT2232DFUSEHMC5883LINA118IR2010IR2101SIR2136SIRF1010EIRFP7404ISO7240InductorLEDLF444LG9110SLM339LM393LMV7239MAX232MCP2551MCP6022MCP6024MPU6050Mic2941Micro SD CardMicro USBNuMicro-M051OPTOISOIPESDxS2UATPT2272PVI1050PhonejackResistanceSN65VHD230STC12LE5202STM32F103CBT6STM32F103RBT6STM32F103VCT6STM32F407VSwitchTJA1050TLV5638ITMS320F28035PAGTMS320F28035PNTOP242U18UC3854ULN2803USB A-BVBUS Xtal 集成库PCB封装列表:76个8P4R_060313W30805DBC04-BBT_CR1220BUZZC0201C0402C0603C0805C1206CD127CPX-32CRYSTALD1206DC-0003DC-0005DIP-4DIP-6DIP-8DO-201ADDO-214AADO-214ABDO-214ACF5mmFUSEFUSE_001FUSE_LFUSE2HC-49/U-SHDRX3L-330uHLCC-24NLPCC-16NLQFP-48LQFP-64LQFP-80Micro SD CardMicro USBR0201R0402R0603R0805R1206R1210R2512SDRH5D18-220NSIP-3SMD CRYSTALSMD-8SOIC-4SOIC-8SOIC-14SOIC-16SOIC-16WSOIC-18SOIC-20SOIC-24SOIC-28SOT-23SOT23-5SOT23-6SWSwitch1TD-19XATO-92TO-92ATO-220-2TO-220ATO-220BTO-247ACTO-263-5TQFP-100TSSOP-16USB DIPUSB-A
标签: altium designer pcb
上传时间: 2022-02-12
上传用户:
ALG技术白皮书1 概述 1.1 产生背景 在应用层协议中,有很多协议都包含多通道的信息,比如多媒体协议(H.323、 SIP等)、FTP、SQLNET等。这种多通道的应用需要首先在控制通道中对后续数 据通道的地址和端口进行协商,然后根据协商结果创建多个数据通道连接。在NAT 的实际应用过程中,NAT仅对网络层报文的报文头进行IP地址的识别和转换,对于 应用层协议协商过程中报文载荷携带的地址信息则无法进行识别和转换,因此在有 NAT处理的组网方案中,NAT利用ALG技术可以对多通道协议进行应用层的报文信 息的解析和地址转换,保证应用层上通信的正确性。 在传统的包过滤防火墙中,也会遇到类似问题。由于包过滤防火墙是基于IP包中的 源地址、目的地址、源端口和目的端口来判断是否允许包通过,这种基于静态IP包 头的匹配虽然可以允许或者拒绝特定的应用层服务,但无法理解服务的上下文会 话,而且对于多通道的应用层协议,其数据通道是动态协商的,无法预先知道数据 通道的地址和端口,无法制定完善的安全策略。ASPF利用ALG技术便可以解决包 过滤防火墙遇到的问题,实现对多通道应用协议的动态检测。 综上所述,ALG和NAT、ASPF特性的配合使用,可以解决这些特性遇到的应用层 协议的多通道问题,进而可以协助网络设备实现整体的网络安全解决方案。 1.2 技术优点 ALG和NAT、ASPF等特性配合使用,为内部网络和外部网络之间的通信提供基于 应用的访问控制,具有以下优点: z ALG 统一对各应用层协议报文进行解析处理,避免了 NAT、ASPF 特性对同 一类报文应用层协议的重复解析,可以有效提高报文转发效率。 z ALG 的状态检测是基于应用层协议的,能够监听每一个应用的每
标签: alg
上传时间: 2022-02-28
上传用户:20125101110