Administrator’s Guide for SIP-T2_Series_T4_Series IP Phones
590
5.
User A transfers the call to User C.
Call is established between User B and User C.
User A
Proxy Server
User B
F1. INVITE B
F4. 180 Ringing
F6. 200 OK
F7. ACK
2-way RTP channel established
F9. INVITE B
(
sendonly
)
F12. 200 OK
F13. ACK
F15. INVITE C
F17. 180 Ringing
F19. 200 OK
F21. ACK
F23. REFER
F24. 202 Accepted
User C
F2. INVITE B
F3. 180 Ringing
F5. 200 OK
F8. ACK
F10. INVITE B
(
sendonly
)
F11. 200 OK
F14. ACK
F16. INVITE C
F18. 180 Ringing
F20. 200 OK
F22. ACK
2-way RTP channel established
F25. REFER
F26. 202 Accepted
F31. BYE
F32. BYE
F33. 200 OK
F34. 200 OK
2-way RTP channel established
Summary of Contents for Yealink SIP-T46G
Page 1: ...啊 ...
Page 8: ...Administrator s Guide for SIP T2_Series_T4_Series IP Phones viii ...
Page 28: ...Administrator s Guide for SIP T2_Series_T4_Series IP Phones 14 ...
Page 70: ...Administrator s Guide for SIP T2_Series_T4_Series IP Phones 56 ...
Page 558: ...Administrator s Guide for SIP T2_Series_T4_Series IP Phones 544 ...
Page 622: ...Administrator s Guide for SIP T2_Series_T4_Series IP Phones 608 ...