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Product comparison · 2 ip phones

AudioCodes 425HD TAA IP-Phone PoE GbE black vs Yealink-SIP-T77U

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  • 42specifications compared
  • 15differ
  • 27identical
  • 46known for one product only

Key differences

The Yealink-SIP-T77U has 480 x 480 pixels more display resolution than the AudioCodes 425HD TAA IP-Phone PoE GbE black (800 x 480 pixels vs 320 x 480 pixels). The Yealink-SIP-T77U has 1 more RJ-9 ports quantity than the AudioCodes 425HD TAA IP-Phone PoE GbE black (2 vs 1). The Yealink-SIP-T77U has 51.7 mm more width than the AudioCodes 425HD TAA IP-Phone PoE GbE black (262.1 mm vs 210.4 mm). Only the Yealink-SIP-T77U has touchscreen. Handset type: Wired handset on the AudioCodes 425HD TAA IP-Phone PoE GbE black, Wired & Wireless handset on the Yealink-SIP-T77U.

  • Handset type
    • Wired handset
    • Wired & Wireless handset
  • Display diagonal
    • 8.89 cm (3.5")
    • 17.8 cm (7")
  • Display resolution
    • 320 x 480 pixels
    • 800 x 480 pixels
  • Touchscreen
    • No
    • Yes
  • RJ-9 ports quantity
    • 1
    • 2
  • Operating temperature (T-T)
    • 0 - 40 °C
    • 10 - 45 °C
  • Storage temperature (T-T)
    • -20 - 70 °C
    • -30 - 70 °C
  • Width
    • 210.4 mm
    • 262.1 mm

Side by side

Differences highlightedShow differences only
88 specifications
A

AudioCodes

425HD TAA IP-Phone PoE GbE black

Model 425HD

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B

Yealink

Yealink-SIP-T77U

Model T77U

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Design1 differ
Product typeIP PhoneIP Phone
Handset typeDiffersWired handsetWired & Wireless handset
Product colourBlackBlack
Backlight keypadKnown for oneYes
MountingKnown for oneDesk
Phone featuresidentical
Answering machineYesYes
Anonymous callKnown for oneYes
Call forwardingYesYes
Call historyKnown for oneYes
Call holdYesYes
Call parkYesYes
Call pick upYesYes
Call returnKnown for oneYes
Call waitingYesYes
Caller IDYesYes
Conference callYesYes
Customizable wallpaperKnown for oneYes
Emergency callKnown for oneYes
Full duplexYesYes
IntercomKnown for oneYes
Message-waiting indicator (MWI)YesYes
Number of VoIP accountsKnown for one12
Phonebook capacityKnown for one1000 entries
Phonebook sharingKnown for oneYes
RedialingYesYes
Speed diallingYesYes
Lines quantityKnown for one4 lines
Call transferKnown for oneYes
Do not disturb functionKnown for oneYes
Management featuresidentical
Integrated voicemailKnown for oneYes
Volume controlButtonsButtons
Management platformKnown for oneYealink Device Management Platform
Number of programmable keysKnown for one8
Display3 differ
DisplayLCDLCD
Display diagonalDiffers8.89 cm (3.5")17.8 cm (7")
Display resolutionDiffers320 x 480 pixels800 x 480 pixels
TouchscreenDiffersNoYes
Backlight displayKnown for oneYes
Audio1 differ
SpeakerphoneYesYes
Microphone muteYesYes
Voice codecsDiffersG.711, G.722, G.729, OPUSG.711a, G.711u, G.723.1, G.726, G.729, G.729A, G.729B, G.729ab
Adaptive jitter buffersKnown for oneYes
Echo cancellationKnown for oneYes
Packet loss concealment (PLC)Known for oneYes
Voice activity detectionKnown for oneYes
Network1 differ
Ethernet LANYesYes
Ethernet LAN data rates10,100,1000 Mbit/s10,100,1000 Mbit/s
Ethernet LAN interface typeGigabit EthernetGigabit Ethernet
Quality of Service (QoS) supportYesYes
Security algorithmsDiffers802.1x RADIUS, HTTPS, SRTP, TLSWPA2, WPA3
SyslogKnown for oneYes
Wi-FiKnown for oneNo
BluetoothKnown for oneNo
Networking standardsKnown for oneIEEE 802.3af, IEEE 802.1x, IEEE 802.1p
Supported network protocolsKnown for oneIPv4, TCP, UDP, ICMP, ARP, RTP, SRTP, RTCP-XR, 802.1x, static IP/DHCP IP assignment, IEEE 802.1p/Q, QoS/ToS, HTTP/HTTPS/DHCP, NTP, FTP/TFTP, CDP/LLDP VLAN configuration, LDAP
VoIP protocolsKnown for oneSIP – RFC 3261, SDP – RFC 2327, SIP over TCP/UDP/TLS, DNS_SRV (redundancy), digest authentication, PRACK, early media, SIP subscribe notify, BLF (busy lamp field), presence, MWI (message waiting indication)
Ports & interfaces1 differ
Headset connectivityKnown for oneRJ-9
USB 2.0 ports quantityKnown for one1
USB Type-C ports quantityKnown for one1
DC-in jackYesYes
Ethernet LAN (RJ-45) ports22
RJ-9 ports quantityDiffers12
Cable lock slotKnown for oneYes
WAN connection typeKnown for oneRJ-45
Poweridentical
Power over Ethernet (PoE)YesYes
AC adapter input voltageKnown for one100 - 240 V
AC adapter output voltageKnown for one5 V
AC adapter output currentKnown for one2 A
Operational conditions2 differ
Operating relative humidity (H-H)Known for one5 - 95%
Operating temperature (T-T)Differs0 - 40 °C10 - 45 °C
Storage temperature (T-T)Differs-20 - 70 °C-30 - 70 °C
Weight & dimensions6 differ
WidthDiffers210.4 mm262.1 mm
DepthDiffers90.9 mm167.5 mm
HeightDiffers212.2 mm219.2 mm
Package widthDiffers244 mm285 mm
Package depthDiffers320 mm253 mm
Package heightDiffers90 mm104 mm
WeightKnown for one984 g
Package weightKnown for one1.46 kg
Packaging contentidentical
Mounting kitKnown for oneYes
Ethernet cableYesYes
HandsetKnown for oneYes
Number of handles included1 pc(s)1 pc(s)
Quick start guideKnown for oneYes
Cables includedKnown for oneLAN (RJ-45)
ManualKnown for oneYes
Performanceidentical
Dual-Tone Multi-Frequency (DTMF) modesKnown for oneSIP info
Certificatesidentical
Compliance certificatesKnown for oneFederal Communications Commission (FCC), ICES, UL, CE, CB, cTUVus, RCM, KC, CCC, EAC, Industry Canada (IC), VCCI, BSMI, TAA

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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