Product comparison · 2 ip phones

Yealink T55A IP phone Grey vs Yealink T56A-Skype for Business

43specifications compared
11differ
32identical
38known for one product only

Key differences

The Yealink T56A-Skype for Business has 0.8 A more AC adapter output current than the Yealink T55A IP phone Grey (2 A vs 1.2 A). The Yealink T56A-Skype for Business has 1.9 W more power consumption (typical) than the Yealink T55A IP phone Grey (4.5 W vs 2.6 W). The Yealink T56A-Skype for Business has 36.4 mm more width than the Yealink T55A IP phone Grey (259.4 mm vs 223 mm). Product colour: Grey on the Yealink T55A IP phone Grey, Black on the Yealink T56A-Skype for Business. Display diagonal: 10.9 cm (4.3") on the Yealink T55A IP phone Grey, 17.8 cm (7") on the Yealink T56A-Skype for Business.

Product colour
- T55A IP phone Grey:Grey
- T56A-Skype for Business:Black
Display diagonal
- T55A IP phone Grey:10.9 cm (4.3")
- T56A-Skype for Business:17.8 cm (7")
Display resolution
- T55A IP phone Grey:480 x 272 pixels
- T56A-Skype for Business:1024 x 600 pixels
AC adapter output current
- T55A IP phone Grey:1.2 A
- T56A-Skype for Business:2 A
Power consumption (typical)
- T55A IP phone Grey:2.6 W
- T56A-Skype for Business:4.5 W
Operating temperature (T-T)
- T55A IP phone Grey:0 - 40 °C
- T56A-Skype for Business:-10 - 50 °C
Width
- T55A IP phone Grey:223 mm
- T56A-Skype for Business:259.4 mm
Depth
- T55A IP phone Grey:206 mm
- T56A-Skype for Business:235.2 mm

Side by side

Differences highlightedShow differences only

Comparison of T55A, T56A-Skype for Business
81 specifications	A Yealink T55A IP phone Grey Model T55A View product	B Yealink T56A-Skype for Business View product
Design1 differ
Product type	IP Phone	IP Phone
Handset type	Wired handset	Wired handset
Product colourDiffers	Grey	Black
Device lock	Yes	Yes
MountingKnown for one	Unknown — not stated by the source	Desk/Wall
Performanceidentical
Dual-Tone Multi-Frequency (DTMF) modes	In-band, Out-of band, SIP info	In-band, Out-of band, SIP info
Hearing aid compatibility	Yes	Yes
Phone featuresidentical
Common area phone (CAP)Known for one	Unknown — not stated by the source	Yes
Hot deskingKnown for one	Unknown — not stated by the source	Yes
Call forwarding	Yes	Yes
Call history	Yes	Yes
Call hold	Yes	Yes
Call park	Yes	Yes
Call transfer	Yes	Yes
Call waiting	Yes	Yes
Caller IDKnown for one	Unknown — not stated by the source	Yes
Conference call	Yes	Yes
Emergency callKnown for one	Unknown — not stated by the source	Yes
Full duplex	Yes	Yes
Intercom	Yes	Yes
Message-waiting indicator (MWI)	Yes	Yes
RedialingKnown for one	Unknown — not stated by the source	Yes
Call pick upKnown for one	Yes	Unknown — not stated by the source
Do not disturb functionKnown for one	Yes	Unknown — not stated by the source
Number of VoIP accountsKnown for one	0	Unknown — not stated by the source
Management featuresidentical
Integrated voicemail	Yes	Yes
Volume controlKnown for one	Unknown — not stated by the source	Yes
Firmware upgradeableKnown for one	Yes	Unknown — not stated by the source
Display2 differ
Display diagonalDiffers	10.9 cm (4.3")	17.8 cm (7")
Display resolutionDiffers	480 x 272 pixels	1024 x 600 pixels
Touchscreen	Yes	Yes
Touchscreen type	Capacitive	Capacitive
Cameraidentical
Front camera	No	No
Rear cameraKnown for one	Unknown — not stated by the source	No
Audio1 differ
Microphone mute	Yes	Yes
Voice codecsDiffers	G.711a, G.722, G.723.1, G.726, G.729A, G.729B, iLBC	AGC, AJB, CNG, G.711a, G.722, G.723.1, G.726, G.729A, G.729B, PLC, Silk, VAD
SpeakerphoneKnown for one	Yes	Unknown — not stated by the source
Adaptive jitter buffersKnown for one	Yes	Unknown — not stated by the source
Automatic gain controlKnown for one	Yes	Unknown — not stated by the source
Comfort noise generation (CNG)Known for one	Yes	Unknown — not stated by the source
Noise reductionKnown for one	Yes	Unknown — not stated by the source
Packet loss concealment (PLC)Known for one	Yes	Unknown — not stated by the source
Voice activity detectionKnown for one	Yes	Unknown — not stated by the source
Network1 differ
Ethernet LAN	Yes	Yes
Ethernet LAN data ratesKnown for one	Unknown — not stated by the source	10,100,1000 Mbit/s
Ethernet LAN interface type	Gigabit Ethernet	Gigabit Ethernet
DHCP clientKnown for one	Unknown — not stated by the source	Yes
Networking standardsDiffers	IEEE 802.1Q, IEEE 802.1p, IEEE 802.1x	IEEE 802.1Q, IEEE 802.1p, IEEE 802.3, IEEE 802.3ab, IEEE 802.3af, IEEE 802.3u
Quality of Service (QoS) support	Yes	Yes
SyslogKnown for one	Unknown — not stated by the source	Yes
Wi-FiKnown for one	No	Unknown — not stated by the source
BluetoothKnown for one	No	Unknown — not stated by the source
Security algorithmsKnown for one	HTTPS, MD5, SIPS, SRTP	Unknown — not stated by the source
Supported network protocolsKnown for one	IPv4/IPv6	Unknown — not stated by the source
Ports & interfacesidentical
Headset connectivityKnown for one	Unknown — not stated by the source	RJ-9
USB 2.0 ports quantity	1	1
Ethernet LAN (RJ-45) ports	2	2
RJ-9 ports quantity	2	2
DC-in jackKnown for one	Yes	Unknown — not stated by the source
Certificatesidentical
CertificationKnown for one	Unknown — not stated by the source	FCC
Compliance certificatesKnown for one	Unknown — not stated by the source	CE
SkypeKnown for one	Unknown — not stated by the source	Yes
Sustainability complianceKnown for one	Unknown — not stated by the source	Yes
Power2 differ
Power over Ethernet (PoE)	Yes	Yes
AC adapter input voltage	100 - 240 V	100 - 240 V
AC adapter output voltage	5 V	5 V
AC adapter output currentDiffers	1.2 A	2 A
Power consumption (typical)Differs	2.6 W	4.5 W
Power consumption (Power over Ethernet (PoE))Known for one	Unknown — not stated by the source	6 W
Operational conditions1 differ
Operating relative humidity (H-H)	10 - 95%	10 - 95%
Operating temperature (T-T)Differs	0 - 40 °C	-10 - 50 °C
Weight & dimensions3 differ
WidthDiffers	223 mm	259.4 mm
DepthDiffers	206 mm	235.2 mm
HeightDiffers	127 mm	194.5 mm
Packaging contentidentical
AC adapter includedKnown for one	Unknown — not stated by the source	Yes
Cables included	LAN (RJ-45)	LAN (RJ-45)
HandsetKnown for one	Unknown — not stated by the source	Yes
Number of handles included	1 pc(s)	1 pc(s)
Quick start guideKnown for one	Unknown — not stated by the source	Yes
Ethernet cableKnown for one	Yes	Unknown — not stated by the source
ManualKnown for one	Yes	Unknown — not stated by the source

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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