Model	SIP-T29G	SIP-T27G	SIP-T23G	SIP-T23P	SIP-T21(P) E2	SIP-T19(P) E2
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Download	Datasheet	Datasheet	Datasheet	Datasheet	Datasheet	Datasheet
LCD	4.3" color LCD	3.66" graphical LCD	2.8" graphical LCD	2.8" graphical LCD	2.3" graphical LCD	2.3" graphical LCD
Resolution	480 x 272	240 x 120	132 x 64	132 x 64	132 x 64	132 x 64
LCD Backlight	√	√	√	√	√	x
Line	16	6	3	3	2	1
PoE	√	√	√	√	√ (T21P E2)	√ (T19P E2)
GigE	√	√	√	x	x	x
Wall Mounting	√	√	√	√	√	√
Foot Stand	2 adjustable angles	2 adjustable angles	1adjustable angle	1adjustable angle	1adjustable angle	1adjustable angle
USB Port (2.0 compliant)	1	1	x	x	x	x
Ethernet Port	Dual-port Gigabit Ethernet	Dual-port Gigabit Ethernet	Dual-port Gigabit Ethernet	2 x RJ45 10/100M Ethernet ports	2 x RJ45 10/100M Ethernet ports	2 x RJ45 10/100M Ethernet ports
Handset Port (RJ-9)	√	√	√	√	√	√
Headset Port (RJ-9)	√	√	√	√	√	√
External Yealink AC Adapter (optional)	AC 100~240V input and DC 5V/2A output	AC 100~240V input and DC 5V/1.2A output	AC 100~240V input and DC 5V/600mA output	AC 100~240V input and DC 5V/600mA output	AC 100~240V input and DC 5V/600mA output    (T21 E2: Standard/T21P E2: Optional)	AC 100~240V input and DC 5V/600mA output  (T19 E2: Standard/T19P E2: Optional)
Line Key	10	8	3	3	2	0
Memory Key	27 (3 pages of 9 keys)	21 (3 pages of 7 keys)	3	3	2	0
EXP50 Expansion Module (Accessory, pruchased separately)	X	X	X	X	X	X
Yealink EXP40 Expansion Module  (Accessory, pruchased separately)	x	x	x	x	x	x
Yealink EXP20 Expansion Module  (Accessory, pruchased separately)	√	√	x	x	x	x
Yealink EHS36 Wireless Headset Adapter (Accessory, pruchased separately)	√	√	x	x	x	x
Yealink YHS32 Headset (Accessory, pruchased separately)	√	√	√	√	√	√
Yealink Bluetooth Adapter BT40 (Accessory, pruchased separately)	√	√	x	x	x	x
Yealink Wi-Fi Adapter WF40 (Accessory, pruchased separately)	√	√	x	x	x	x
USB Recording	√	√	x	x	x	x
3-way Conferencing	√	√	√	√	√	√
HD Voice	HD Speaker HD Handset	HD Speaker HD Handset	HD Speaker HD Handset	HD Speaker HD Handset	HD Speaker HD Handset	HD Handset
Wide-band Codecs	G.722	G.722,Opus	G.722, Opus	G.722, Opus	G.722, Opus	G.722, Opus
Narrow-band Codecs	G.711(A/µ), G.723, G.729AB, G.726, iLBC	G.711(A/µ), G.729A/B, G.726,  G.723.1, iLBC, Opus	G.711(A/µ), G.729AB, G.726, iLBC	G.711(A/µ), G.729AB, G.726, iLBC	G.711(A/µ), G.729AB, G.726, iLBC	G.711(A/µ), G.729AB, G.726, iLBC
LCD Type	Fixed	Fixed	Fixed	Fixed	Fixed	Fixed
Operating System	Linux	Linux	Linux	Linux	Linux	Linux
Built-in Bluetooth	X	X	X	X	X	X
Built-in Wi-Fi	X	X	X	X	X	X
USB Headset (Accessory, pruchased separately)	X	X	X	X	X	X
Camera	X	X	X	X	X	X
Video Resolution	X	X	X	X	X	X
Video Codecs	X	X	X	X	X	X
3-way Video Conferencing	X	X	X	X	X	X
5-way video/audio mixed conferencing	X	X	X	X	X	X
HDMI	X	X	X	X	X	X

With faster response on the phone’s user interface and better device performance, the SIP-T27G IP phone, as the upgraded product of T27P, is Yealink’s latest feature-rich tool unifying superior voice capabilities and increased function extension capability for business.Yealink Optima HD technology and wideband codec of Opus deliver a superb sound quality and bring you a life-like voice communications. With an all-new USB port, the SIP-T27G boasts unparalleled functionality and expansibility, which comes ready for future Bluetooth, Wi-Fi and USB recording features. Seamlessly migrated to GigE-based network infrastructure, SIP-T27G IP phone is also built with the Gigabit Ethernet facilitating very rapidly call handling. By using standard encryption protocols, the SIP-T27G performs highly secure remote provisioning and software upgrades.• Yealink Optima HD voice• Gigabit• USB 2.0• Opus* codec support• Up to 6 SIP accounts• Paper label free design• PoE support• Headset, EHS support• Supports expansion modules