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Yealink T27P Administrator's Guide

Yealink T27P
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Appendix
595
4. User C answers the call.
Call is established between User A and User C.
User A Proxy Server User B User C
F1. INVITE B
F2. INVITE B
F3. 302 Move Temporarily
F6. ACK
F7. INVITE C
F8. INVITE C
F9. 180 Ringing
F10. 180 Ringing
F11. 200 OK
F12. 200 OK
F13. ACK
F14. ACK
F4. ACK
2-way RTP channel established
F5. 302 Move Temporarily

Table of Contents

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User Guide131 pages
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Yealink T27P Specifications

General IconGeneral
Wall MountableYes
Local Phonebook1000 entries
BluetoothNo
Wi-FiNo
Gigabit EthernetNo
Display3.66" 240x120 pixel graphical LCD with backlight
Audio FeaturesHD voice, Full-duplex speakerphone
NetworkDual-port 10/100 Ethernet switch
ProtocolsSIP v1 (RFC2543), v2 (RFC3261)
PowerIEEE 802.3af PoE
Connectivity2 x RJ45 10/100M Ethernet ports
Voice CodecsG.711(A/μ), G.722, G.723, G.729AB, G.726
EHSSupports EHS with Plantronics headsets
Headset PortYes
Power Adapter5V DC (optional)

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