SIP中所有消息列表如下:SIPMethodDescriptionReferenceINVITEINVITEindicatesthataclientisbeing invitedtoparticipateinacallsessionRFC3261ACKACKConfirmsthattheclienthasreceiveda finalresponsetoanINVITErequestRFC3261BYETerminatesacall;Itcanbesentbyeither thecallerorthecalledpartyRFC3261CANCELCancelsanypendingrequestRFC3261...
SIP Basic Procedure REGISTRATION with Authentication SUBSCRIBE/NOTIFY INVITE VoIP SIP Registration Path SIP Message Delivery Path IMS Registration Unauthenticated IMS Registration Attempt IPSec Security Association Establishment Authenticated IMS Registration IMS/SIP UnRegistration SIP Forking IMS/SIP Testing XDM/...
整理自bbs.cnttr.com Technorati 标记: SIP BYE, SIP Cancel, SIP Early Dialog Q:在DIALOG建立过程中能否发BYE?在DIALOG建立过程中(即没有收到200OK回应之前),能否发BYE,如果发了BYE,有什么结果? A.1 参照RFC3261,主叫侧可以通过BYE来终结"early dialog",也就是没有收到"200 OK"响应之前15 Terminating a...
假如I-CSCF收到一种CANCEL祈求,同步I-CSCF旳内部状态显示和HSS旳Cx流程正在进行过程中,I-CSCF会用200OK回应CANCEL,用487响应原先旳祈求,接下来会丢弃全部来自HSS旳Cx应答信息。 E.164地址转换 当收到旳SIP消息中Request-URI中旳SIPURI涉及“user=phone”时,I-CSCF在向HSS发生查询之前,应将E.164格式旳地址转换为...
在VoLTE呼叫中SIP协议用于会话的创建,修改和终止;负责两个用户之间会话的协商。SIP不执行由RTP&RTCP完成的传输层(数据传递)。 SIP是按(顺)序交互的协议,其功能和格式上类似于HTTP的请求和响应。每个SIP请求中都以包含请求类型的起始行开头。SIP中所有消息列表如下: SIP Method Description Reference INVITE INVITE indi...
481 Call/Transaction Does Not Exist 482 Loop Detected 483 Too Many Hops 484 Address Incomplete 485 Ambiguous 486 Busy Here 487 Request Terminated 488 Not Acceptable Here SDP offer conveyed in a SIP response contained parameters which are not allowed according to the local policy(TS ...
如果I-CSCF收到一个CANCEL请求,同时I-CSCF的内部状态显示和HSS的Cx流程正在进行过程中,I-CSCF会用200 OK回应CANCEL,用487响应原先的请求,接下来会丢弃所有来自HSS的Cx应答信息。 E.164地址转换当收到的SIP消息中Request-URI中的SIP URI 包含“user=phone”时,I-CSCF在向HSS发生查询之前,应将E.164格式的地址...