eXosip notify 问题

[wdarhyr]

请问 eXosip notify 的 "481 Subscription does not exist" 怎么解决啊，

呼叫流程：
Request-line: REGISTER sip:1277@192.168.1.127:5061 SIP/2.0
Message Hander
via: SIP/2.0/UDP 192.168.1.222:5061;rport;branch=z9hG4bk493309222
From: <sip:1234@192.168.1.222>;tag=248764682
To: <sip:1234@192.168.1.222>
Call-ID： 11772828893
CSeq： 1 REGISTER
Contact： <sip:1234@192.168.1.222>
Max-Forward： 70
User-Agent: 100
Content-Length: 0

Status-Line SIP/2.0 200 OK
Message Header
Via: SIP/2.0/UDP 192.168.1.222:5061;rport=5061;branch=z9hG4bk493309222
From: <sip:1234@192.168.1.222>;tag=248764682
To: <sip:1234@192.168.1.222>;tag=4042827898
Call-ID： 11772828893
CSeq： 1 REGISTER
User-Agent: IMOS/V3
Content-Length: 0


Request-Line: NOTIFY sip:1277@192.168.1.127:5061 SIP/2.0
Message Header
Via: SIP/2.0/UDP 192.168.1.222:5061;rport;branch=z9hG4bk1624238234
From: <sip:1234@192.168.1.222>;tag=445519538
To: <sip:1277@192.168.1.127:5061>
Call-ID: 961996396
CSeq: 20 NOTIFY
Content-Type: application/DDCP
Max-Forward: 70
User-Agent: eXosip/3.3.0
Expires: 3500
Content-Length: 796
Message Body(省略)

Status-Line: SIP/2.0 481 Subscription Does Not Exist
Message Hander
Via: SIP/2.0/UDP 192.168.1.222:5061;rport=5061;branch=z9hG4bk1624238234
From: <sip:1234@192.168.1.222>;tag=445519538
To: <sip:1277@192.168.1.127:5061>;tag=1884611514
Call-ID: 961996396
CSeq: 20 NOTIFY
User-Agent: IMOS/V3
Content-Length: 0

[xiazl19870912]

求解，这是创建方式不正确吗？

[云梦谭]

这个终端是不是之前订阅过？重新注册之后，可能需要重新订阅。对NOTIFY回481，说明订阅的Call-ID: 961996396这个SIP dialog在终端这里不存在。