PortSIP VoIP SDK是PortSIP （博瞻信息） 自主研發(fā)、基于SIP標準的客戶端開發(fā)套件，可以讓客戶加快和簡化語音、視頻和消息的IP應用程序開發(fā)，使得系統制造商和服務商能夠在其應用和設備中快速添加全新的語音、視頻和消息服務，可以為其解決方案增添新的通信服務和特性，從而搶占市場先機。
PortSIP （博瞻信息） CTO 許宜芳評價到：
“PortSIP VoIP SDK V15是我們在吸取了眾多用戶的反饋意見，以及跟隨IETF的最新協議標準發(fā)展基礎上開發(fā)的一個重大新版本，在性能和穩(wěn)定性上具有提升，同時增加了不少新功能，比如增加了對 iOS CallKit的支持，對3GPP IMS的標準支持，以及對網絡狀態(tài)的檢測等功能，從而使得 PortSIP VoIP SDK 成為用戶開發(fā)基于SIP協議的音視頻程序首選框架。”
作為業(yè)界領先的統一通信產品和方案提供商， PortSIP一直以優(yōu)良的產品性能和良好的技術支持服務獲得廣大用戶的贊賞。 PortSIP VoIP SDK的典型用戶包括：Agilent/Keysight, Siemens, Qualcomm, Netflix, Fujitsu, NEC等世界知名公司。
附： Release Notes
- Support callkit for iO
- Support 3GPP Call-Waiting
- Support 3GPP IMS Conferencing
- Support Present Agent（PUBLISH）
- Moved LocalIP and localPort parameters from setUser function to initialize function.
- New parameter “sessionId” added for setVideoBitrate and setVideoFrameRate functions, set it to specify session.
- Removed setDisplayName function, now use “setUser” function to set the display name.
- Removed detectMwi function, now use sendSubscription function to check MWI.
- Removed presenceOnline and presenceOffline functions, use setPresenceStatus function to instead of it.
- Replace createConference with createAudioConference and createVideoConference.
- Renamed enableCheckMwi to enableAutoCheckMwi.
- Renamed presenceSubscribeContact function to presenceSubscribe
- New parameter “sipMessage” added for callback events onInviteIncoming, onInviteSessionProgress, onInviteRinging, onInviteAnswered, onInviteUpdated, allows obtain the specify SIP header value from “sipMessage”。
- Added roundTripTime parameter to getAudioRtcpStatistics function.
- Added sendSubscription and terminateSubscription functions.
- Added setPresenceStatus function.
- Added function outOfDialogRefer.
- Added function attendedRefer2.
- Added function removeUser.
- Added function refreshRegistration. When network changed between WIFI and LTE, should call this API to refresh registry.
- Added setDefaultSubscriptionTime function
- Added setDefaultPublicationTime function
- Added setPresenceMode function
- Added presenceTerminateSubscribe
- Added pickupBLFCall function.
- iOS: New functions startAudio and stopAudio added. It will be used by callkit.
- iOS: callkit support added for iOSSIPSample, Added new class CallManger.
- iOS: Add libc++.tbd to “Link Binary With Libraries”。
- Android: Remove API setSystemOutputMute, getSystemOutputMute, setSystemInputMute, getSystemInputMute.
- Fixed some other minor bugs.
