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Answering an incoming call............................................................................................. - 24 -

Denying an incoming call ................................................................................................ - 25 -

DND................................................................................................................................. - 25 -

Call Forward .................................................................................................................... - 25 -

During an Active Call .............................................................................................................. - 26 -

Mute................................................................................................................................. - 26 -

Call Hold.......................................................................................................................... - 26 -

Call Waiting ..................................................................................................................... - 27 -

Call Transfer..................................................................................................................... - 27 -

3-way Conference ............................................................................................................ - 28 -

Message.................................................................................................................................... - 28 -

Voicemail ......................................................................................................................... - 28 -

SMS.................................................................................................................................. - 29 -

Using the Advanced Phone Functions..........................................- 32 -

Account Setting........................................................................................................................ - 32 -

TLS .................................................................................................................................. - 33 -

Network Setting ....................................................................................................................... - 33 -

PC Port Setting................................................................................................................. - 33 -

VLAN Setting .................................................................................................................. - 34 -

HTTPS ............................................................................................................................. - 35 -

Maintenance Tasks................................................................................................................... - 36 -

Administrator Mode......................................................................................................... - 36 -

Administrator/User Password .......................................................................................... - 36 -

Reboot.............................................................................................................................. - 37 -

Reset to Factory ............................................................................................................... - 37 -

Firmware Update.............................................................................................................. - 38 -

Decryption........................................................................................................................ - 39 -

System Log Export........................................................................................................... - 40 -

Programmable Key Configuration........................................................................................... - 40 -

BLF .................................................................................................................................. - 41 -

Line .................................................................................................................................. - 42 -

Speed Dial........................................................................................................................ - 42 -

Intercom........................................................................................................................... - 42 -

URL.................................................................................................................................. - 43 -

BLA.................................................................................................................................. - 43 -

Conference ....................................................................................................................... - 43 -

Forward............................................................................................................................ - 43 -

Transfer ............................................................................................................................ - 44 -

Hold.................................................................................................................................. - 44 -

DND................................................................................................................................. - 44 -

Redial............................................................................................................................... - 45 -

Call Return....................................................................................................................... - 45 -

Group Pickup ................................................................................................................... - 45 -

Expansion module support	Yes
Ethernet LAN (RJ-45) ports	2
Keypad number of keys	48
Voice codecs	G.711, G.722, G.723.1, G.726
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Touchscreen	-
Display resolution	320 x 160 pixels
Lines quantity	- lines
Phonebook capacity	- entries
Number of VoIP accounts	6
Bluetooth	No
Security algorithms	HTTPS, SSL/TLS
AC adapter input voltage	100 - 240 V
AC adapter output voltage	5 V
Power consumption (typical)	2.6 W
Operating relative humidity (H-H)	10 - 95 %
Compliance industry standards	IEEE 802.3af
Number of handles included	1 pc(s)

Depth	204 mm
Width	273 mm
Height	42 mm
Weight	1050 g

Yealink SIP- T28P User Manual

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