1>Call Flow Between Two SIP Gateways 在这个场景里,GW-A扮演UAC的角色,GW-B扮演UAS的角色 1) 左边的模拟电话摘机,拨叫右边的模拟电话,左边的PBX给GW-A发出call setup message。GW-A向GW-B发起INVITE,其中会包含用于协商capability的SDP,同时GW-A还会向左边的PBX发出call proceeding,告诉它会话正在建立当中。
sip call flow Incoming call Step one, 收到一个呼叫请求，并携带caller的媒体能力 Step two, 发送一个确认回应 Step three, 发送一个正在振铃回应 Step four，发送一个应答回应，携带callee确认的媒体信息 Step five, 收到一个确认回应 Step six，收到一个会话终止请求 Step seven，发送一个确认回应 Outgoing ...
voice-setup - 进入语音拨号策略视图 dial-program - 进入VoIP语音实体视图 entity entity-number voip - 使能媒体旁路 media flow-around 缺省情况下,媒体流经过SIP Trunk设备进行中继转发 2.7 配置DO-EO转换 携带SDP Offer的INVITE消息请求称为Early Offer,不携带SDP Offer的INVITE消息称为Delayed ...
There are various forms ofSIP call flowsdepending on the software involved—basic SIP to SIP, proxy servers, SIP Gateways, etc. Here we’ve focused on the basic SIP call flow: a direct call from one SIP user to another. Source. Without knowing the usual SIP requests and response codes, ...
SIPCALLFLOW 1.Introduction SessionInitiationProtocol(SIP)isanapplicationlayersignallingprotocol forcreating,modifyingandterminatingsessionswithoneormore participantsoverIPnetwork.Thesesessionsincludetelephonecalls, multimediaconferences,instantmessagingetc.usingaudio,videoand ...
The call flow is as follows: 1. User A calls User B. 2. User B answers the call. 3. User B puts User A on hold. 4. User B takes User A off hold. Figure B-2 Successful Call Setup and Hold User A PBX A GW1 IP Network SIP IP Phone User B IP 1. Setup 3. Call ...
SIP Call Flow Basic SIP session setup involves a SIP UA client sending a request to the SIP URL of the called endpoint (UAS), inviting it to a session. If the UAC knows the IP address of the UAS, it can send the request. Otherwise, the UAC sends the request to a proxy or ...
首先是终端和GK之间的H.225 RAS消息(Registration、Admission、Status),用于终端的向GK注册,呼叫接纳控制及状态查询。类似于SIP流程中的UA向SIP Proxy进行SIP register和注册刷新,用于终端注册及状态查询,商用实现中SIP Proxy通常都会启用的呼叫接纳控制(CAC:Call Admission Control)。
SIP callflow diagram for a Call Setup and termination using RTP for media and RTCP for control. Read about SIP messages indepth here SDP ( Session Description Protocol) SIP can bear many kinds of MIME attachments , one such is SDP. SDP contains session metadata used for establishing the sess...
However, if you can capture SIP call flow diagrams, it can become a relatively straightforward debug task since the call flows show all of the control messages being passed between the PBX and the phone. In this guide we will introduce some tools that can be used to capture and analyze ...