Administrator’s Guide for SIP-T2xP and SIP-T19P IP Phones
448
The call flow scenario is as follows:
1.
User A calls User B.
2.
User B does not answer the call.
3.
User A hangs up.
The call cannot be set up successfully.
User A
Proxy Server
User B
F1. INVITE B
F2. INVITE B
F3. 180 Ringing
F4. 180 Ringing
F8. 200 OK
F7. 200 OK
F5. CANCEL
F6. CANCEL
Содержание Yealink SIP-T28P
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Страница 253: ...Configuring Security Features 237 ...
Страница 265: ...Resource Files 249 ...
Страница 279: ...Troubleshooting 263 ...