Yealink SIP-T2XP Administration Guide

Administrator’s Guide for SIP-T2xP IP Phones
208
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
F27. NOTIFY
F29. 200 OK
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
F28. NOTIFY
F30. 200 OK
F31. BYE
F32. BYE
F33. 200 OK
F34. 200 OK
2-way RTP channel established

Yealink SIP-T2XP Specifications

General

Brand	Yealink
Model	SIP-T2XP
Category	IP Phone
Language	English