Yealink SIP-T2XP Administrator's Manual page 455
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Also See for SIP-T2XP:
- Administrator's manual (589 pages) ,
- Auto provisioning manual (294 pages) ,
- Provisioning manual (294 pages)
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3.
User A places User B on hold.
User A
F1. INVITE B
F4. 180 Ringing
F6. 200 OK
F7. ACK
F9. INVITE B (sendonly)
F12. 200 OK
F13. ACK
Proxy Server
2-way RTP channel established
No RTP packets being sent
F2. INVITE B
F3. 180 Ringing
F5. 200 OK
F8. ACK
F10. INVITE B (sendonly)
F11. 200 OK
F14. ACK
Appendix
User B
439
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