0ab～j ip電話端末（sip） が具備すべき機能等に関するガイドラ … · 2016. 9....
TRANSCRIPT
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4
-TA/
UA
Session Initiation Protocol
TTC /
INVITE
INVITE
OK
7
100 Trying200 OK487 Request Terminated
100 Trying
(Temporarily Unavailable)
(Busy Here)
(REGISTER)
503Service unavailable
503Service unavailable
Reason Protocol Q.850Protocol Cause 42
503(Service Unavailable)
18
Warning Warning 399 warn-txt text
text
INVITE
IP
ICMP Echo Reply
CANCEL
A.2.3
Retry-After
REGISTER
Retry-After
Unavailable
503(Service Unavailable)
503Service Unavailable
3
SIP
IP
IP
ICMP Echo Reply
()
KDDI()
KDDI()
()
()
()
()
()
()
()
()
()
()
()
()
()
()
()
()
()
()
45
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. ....................................................................................................... 37
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.................................................................................................................... 42
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4
-TA/
UA
Session Initiation Protocol
TTC /
INVITE
INVITE
OK
7
100 Trying200 OK487 Request Terminated
100 Trying
(Temporarily Unavailable)
(Busy Here)
(REGISTER)
503Service unavailable
503Service unavailable
Reason Protocol Q.850Protocol Cause 42
503(Service Unavailable)
18
Warning Warning 399 warn-txt text
text
INVITE
IP
ICMP Echo Reply
CANCEL
A.2.3
Retry-After
REGISTER
Retry-After
Unavailable
503(Service Unavailable)
503Service Unavailable
3
SIP
IP
IP
ICMP Echo Reply
()
KDDI()
KDDI()
()
()
()
()
()
()
()
()
()
()
()
()
()
()
()
()
()
()
45