Product comparison · 2 ip phones

HP Poly OBi VVX 250 4-Line IP Phone and PoE-enabled vs Yealink SIP-T44U IP phone Grey 8 lines LCD Wi-Fi

22specifications compared
8differ
14identical
37known for one product only

Key differences

The Yealink SIP-T44U IP phone Grey 8 lines LCD Wi-Fi has 4 lines more lines quantity than the HP Poly OBi VVX 250 4-Line IP Phone and PoE-enabled (8 lines vs 4 lines). The Yealink SIP-T44U IP phone Grey 8 lines LCD Wi-Fi has 1 more USB 2.0 ports quantity than the HP Poly OBi VVX 250 4-Line IP Phone and PoE-enabled (2 vs 1). Product colour: Black on the HP Poly OBi VVX 250 4-Line IP Phone and PoE-enabled, Grey on the Yealink SIP-T44U IP phone Grey 8 lines LCD Wi-Fi. Display: LED on the HP Poly OBi VVX 250 4-Line IP Phone and PoE-enabled, LCD on the Yealink SIP-T44U IP phone Grey 8 lines LCD Wi-Fi. Ethernet LAN data rates: 10,100,1000 Mbit/s on the HP Poly OBi VVX 250 4-Line IP Phone and PoE-enabled, 1000 Mbit/s on the Yealink SIP-T44U IP phone Grey 8 lines LCD Wi-Fi.

Product colour
- OBi VVX 250 4-Line IP Phone and PoE-enabled:Black
- SIP-T44U IP phone Grey 8 lines LCD Wi-Fi:Grey
Lines quantity
- OBi VVX 250 4-Line IP Phone and PoE-enabled:4 lines
- SIP-T44U IP phone Grey 8 lines LCD Wi-Fi:8 lines
Display
- OBi VVX 250 4-Line IP Phone and PoE-enabled:LED
- SIP-T44U IP phone Grey 8 lines LCD Wi-Fi:LCD
Ethernet LAN data rates
- OBi VVX 250 4-Line IP Phone and PoE-enabled:10,100,1000 Mbit/s
- SIP-T44U IP phone Grey 8 lines LCD Wi-Fi:1000 Mbit/s
USB 2.0 ports quantity
- OBi VVX 250 4-Line IP Phone and PoE-enabled:1
- SIP-T44U IP phone Grey 8 lines LCD Wi-Fi:2
Operating relative humidity (H-H)
- OBi VVX 250 4-Line IP Phone and PoE-enabled:5 - 95%
- SIP-T44U IP phone Grey 8 lines LCD Wi-Fi:5 - 90%
Operating temperature (T-T)
- OBi VVX 250 4-Line IP Phone and PoE-enabled:0 - 40 °C
- SIP-T44U IP phone Grey 8 lines LCD Wi-Fi:-10 - 45 °C
Storage temperature (T-T)
- OBi VVX 250 4-Line IP Phone and PoE-enabled:-40 - 70 °C
- SIP-T44U IP phone Grey 8 lines LCD Wi-Fi:-30 - 70 °C

Side by side

Differences highlightedShow differences only

Comparison of OBi VVX 250 4-Line IP Phone and PoE-enabled, SIP-T44U
59 specifications	A HP Poly OBi VVX 250 4-Line IP Phone and PoE-enabled View product	B Yealink SIP-T44U IP phone Grey 8 lines LCD Wi-Fi Model SIP-T44U View product
Design1 differ
Product colourDiffers	Black	Grey
Wall mountableKnown for one	Unknown — not stated by the source	Yes
Handset typeKnown for one	Wired handset	Unknown — not stated by the source
Phone features1 differ
Lines quantityDiffers	4 lines	8 lines
Anonymous callKnown for one	Unknown — not stated by the source	Yes
Caller IDKnown for one	Unknown — not stated by the source	Yes
Direct callKnown for one	Unknown — not stated by the source	Yes
Full duplexKnown for one	Unknown — not stated by the source	Yes
Number of VoIP accountsKnown for one	Unknown — not stated by the source	12
Phonebook capacityKnown for one	Unknown — not stated by the source	1000 entries
SIP registrar serverKnown for one	Unknown — not stated by the source	Yes
Call transferKnown for one	Yes	Unknown — not stated by the source
Distinctive ringKnown for one	Yes	Unknown — not stated by the source
Do not disturb functionKnown for one	Yes	Unknown — not stated by the source
RedialingKnown for one	Yes	Unknown — not stated by the source
Speed diallingKnown for one	Yes	Unknown — not stated by the source
Display1 differ
DisplayDiffers	LED	LCD
Backlight displayKnown for one	Unknown — not stated by the source	Yes
Audioidentical
Microphone muteKnown for one	Unknown — not stated by the source	Yes
Comfort noise generation (CNG)Known for one	Yes	Unknown — not stated by the source
Voice activity detectionKnown for one	Yes	Unknown — not stated by the source
Voice codecsKnown for one	G.711, G.722, G.722.1, G.729ab, OPUS, iLBC	Unknown — not stated by the source
Network1 differ
Ethernet LAN data ratesDiffers	10,100,1000 Mbit/s	1000 Mbit/s
Wi-FiKnown for one	Unknown — not stated by the source	Yes
Security algorithmsKnown for one	802.1x RADIUS, HTTPS	Unknown — not stated by the source
SyslogKnown for one	Yes	Unknown — not stated by the source
Ports & interfaces1 differ
USB 2.0 ports quantityDiffers	1	2
RJ-9 ports quantityKnown for one	Unknown — not stated by the source	2
Poweridentical
AC adapter output voltageKnown for one	5 V	Unknown — not stated by the source
AC adapter output currentKnown for one	3 A	Unknown — not stated by the source
Operational conditions3 differ
Operating relative humidity (H-H)Differs	5 - 95%	5 - 90%
Operating temperature (T-T)Differs	0 - 40 °C	-10 - 45 °C
Storage temperature (T-T)Differs	-40 - 70 °C	-30 - 70 °C
Weight & dimensionsidentical
WidthKnown for one	Unknown — not stated by the source	224.9 mm
DepthKnown for one	Unknown — not stated by the source	206.2 mm
HeightKnown for one	Unknown — not stated by the source	174.9 mm
Packaging contentidentical
Ethernet cableKnown for one	Unknown — not stated by the source	Yes
HandsetKnown for one	Unknown — not stated by the source	Yes
Quick start guideKnown for one	Unknown — not stated by the source	Yes
Stand includedKnown for one	Unknown — not stated by the source	Yes
AC adapter includedKnown for one	Yes	Unknown — not stated by the source
Technical detailsidentical
Warranty periodKnown for one	1 year(s)	Unknown — not stated by the source
Certificatesidentical
Sustainability certificatesKnown for one	ENERGY STAR	Unknown — not stated by the source
SafetyKnown for one	UL 60950-1/62368-1, CE Mark, CAN/CSA C22.2 No 60950-1/62368-1-1, EN 60950-1/62368-1, IEC 60950-1/62368-1, AS/NZS 60950-1	Unknown — not stated by the source
CertificationKnown for one	FCC Part 15 (CFR 47) Class B ICES-003 Class B EN55032 Class B CISPR32 Class B VCCI Class B EN55024 EN61000-3-2; EN61000-3-3 NZ Telepermit Korea KCC3 UAE TRA Russia CU3 Brazil ANATEL3 Australia RCM South Africa ICASA3 Saudi Arabia CITC China CCC3 RoHS Complian TAA	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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