Yealink SIP-T2 Series Administrator's Manual page 508
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Also See for SIP-T2 Series:
- Administrator's manual (1108 pages) ,
- Auto provisioning manual (241 pages) ,
- Provisioning manual (231 pages)
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Administrator's Guide for SIP-T23 & T23P & T23G IP Phones
3.
User A places User B on hold.
User A
F9. INVITE B (sendonly)
496
Proxy Server
F1. INVITE B
F4. 180 Ringing
F6. 200 OK
F7. ACK
2-way RTP channel established
F12. 200 OK
F13. ACK
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
User B
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