issue
我曾经通过请一个朋友帮我从一台远程电脑,我可以连接电脑之间,但这里的事情,根据所有的
examples
传出请求5:
INVITE sip:320@hostName.hn SIP/2.0
Contact: "Client 310" <sip:310@hostName.hn>
From: "Client 310" <sip:310@hostName.hn>
Max-Forwards: 32
CSeq: 2 INVITE
Call-ID: f8d171d3278788df9e03eb9cf3acba70@xxx.xxx.x.xxx
Allow: INVITE,CANCEL,ACK,BYE,OPTIONS
Content-Type: application/sdp
Proxy-Authorization: Digest username="310",nonce="012afffb",realm="asterisk",uri="sip:310@hostName.hn",algorithm=MD5,response="d19ca5b98450b4be7bd4045edb8a3a2f"
Via: SIP/2.0/UDP hostName.hn:5060
To: "Client 320" <sip:320@hostName.hn>;tag=as5a8fa200
Content-Length: 257
v=0
o=310 7108915969559970847 7108915969559970847 IN IP4 xxx.xxx.x.xxx
s=-
i=Nu-Art Software - TacB0sS VoIP information
c=IN IP4 xxx.xxx.x.xxx
m=audio 3312 RTP/AVP 0 8 101
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
传入响应6:
SIP/2.0 100 Trying
Via: SIP/2.0/UDP hostName.hn:5060;branch=f8d171d3278788df9e03eb9cf3acba70-xxx.xxx.x.xxx-2-invite-hostName.hn-5060333732;received=79.181.6.233
From: "Client 310" <sip:310@hostName.hn>
To: "Client 320" <sip:320@hostName.hn>;tag=as5a8fa200
Call-ID: f8d171d3278788df9e03eb9cf3acba70@xxx.xxx.x.xxx
CSeq: 2 INVITE
User-Agent: Freeswitch 1.2.3
Allow: INVITE,ACK,CANCEL,OPTIONS,BYE,REFER,SUBSCRIBE,NOTIFY,INFO
Supported: replaces
Contact: <sip:320@yy.yy.yy.yy>
Content-Length: 0
SIP/2.0 180 Ringing
Via: SIP/2.0/UDP hostName.hn:5060;branch=f8d171d3278788df9e03eb9cf3acba70-xxx.xxx.x.xxx-2-invite-hostName.hn-5060333732;received=79.181.6.233
From: "Client 310" <sip:310@hostName.hn>
To: "Client 320" <sip:320@hostName.hn>;tag=as5a8fa200
Call-ID: f8d171d3278788df9e03eb9cf3acba70@xxx.xxx.x.xxx
CSeq: 2 INVITE
User-Agent: Freeswitch 1.2.3
Allow: INVITE,ACK,CANCEL,OPTIONS,BYE,REFER,SUBSCRIBE,NOTIFY,INFO
Supported: replaces
Contact: <sip:320@yy.yy.yy.yy>
Content-Length: 0
呼叫:320@hostName.hn 正在响
传入响应8:
SIP/2.0 183 Session Progress
Via: SIP/2.0/UDP hostName.hn:5060;branch=f8d171d3278788df9e03eb9cf3acba70-xxx.xxx.x.xxx-2-invite-hostName.hn-5060333732;received=79.181.6.233
From: "Client 310" <sip:310@hostName.hn>
To: "Client 320" <sip:320@hostName.hn>;tag=as5a8fa200
Call-ID: f8d171d3278788df9e03eb9cf3acba70@xxx.xxx.x.xxx
CSeq: 2 INVITE
User-Agent: Freeswitch 1.2.3
Allow: INVITE,ACK,CANCEL,OPTIONS,BYE,REFER,SUBSCRIBE,NOTIFY,INFO
Supported: replaces
Contact: <sip:320@yy.yy.yy.yy>
Content-Type: application/sdp
Content-Length: 264
v=0
o=root 27669 27669 IN IP4 yy.yy.yy.yy
s=session
c=IN IP4 yy.yy.yy.yy
t=0 0
m=audio 10914 RTP/AVP 0 8 101
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=silenceSupp:off - - - -
a=ptime:20
a=sendrecv
传入响应9:
SIP/2.0 503 Service Unavailable
Via: SIP/2.0/UDP hostName.hn:5060;branch=f8d171d3278788df9e03eb9cf3acba70-xxx.xxx.x.xxx-2-invite-hostName.hn-5060333732;received=79.181.6.233
From: "Client 310" <sip:310@hostName.hn>
To: "Client 320" <sip:320@hostName.hn>;tag=as5a8fa200
Call-ID: f8d171d3278788df9e03eb9cf3acba70@xxx.xxx.x.xxx
CSeq: 2 INVITE
User-Agent: Freeswitch 1.2.3
Allow: INVITE,ACK,CANCEL,OPTIONS,BYE,REFER,SUBSCRIBE,NOTIFY,INFO
Supported: replaces
Content-Length: 0
谢谢,
亚当。
如果你注意到我收到回复的时间:
传入响应7:
1275879030656
响铃
传入响应8:
1275879038734
会话进度
传入响应9:
服务不可用
我不明白这里的逻辑,从第一次响铃到会话进程我有8秒,但是从
到
服务不可用
我有47毫秒?
这有什么意义?50毫秒做什么?分析响应的时间+打开RTP会话的时间+构造响应的时间+构造SDP的时间+服务器接收消息所需的时间-503消息到达我的UAC所需的时间,这不是很接近吗?我应该在什么时候响应服务器?
再次感谢你的帮助。
