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KX-NT551
Key Features

1-line backlit LCD Display

8 flexible CO buttons

2 gigabit Ethernet port (1000 Base-T)

Power-over-Ethernet (PoE)

Eco mode

A range of options to suit your business. Maximum performance delivered via a gigabit connection.

The KX-NT551 IP telephone delivers exceptional professional performance. It takes you to a new dimension in audio experience, thanks to excellent HD quality audio, combined with easy access to powerful supportive features and applications. The sleek, ultra-modern design, available in both black and white, works well with any office decor.

High definition audio

The KX-NT551 offers best-in-class audio quality, meaning fewer repeated conversations and misheard calls. Coupled with Enhanced Echo Cancellation and an Expanded Acoustic Chamber, the KX-NT551 delivers a superior audio experience to users over handset, speakerphone and optional headsets. It also features wideband-compliant, hearing aid compatible handsets, and built-in, high-quality speaker and microphone.

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  • 00116062 Terminal Brochure V15 AW
    00116062 Terminal Brochure V15 AW
    Terminal Brochure (English)
    Tue, 04/12/2018 - 10:33
    Download pdf - 4.29 MB

Please see below the services available for this product. You can also use this section to access the general Service & Downloads area of the website or contact our Technical Support team.

General service & downloads Contact technical support

Please see below the services available for this product. You can also use this section to access the general Service & Downloads area of the website or contact our Technical Support team.

General service & downloads Contact technical support

There are currently no key services available.

Please see below the services available for this product. You can also use this section to access the general Service & Downloads area of the website or contact our Technical Support team.

General service & downloads Contact technical support

There are currently no other services available.

Specifications

LCD Type Graphic
LCD Dots (W x H) 160 x 18
LCD Line 1
LCD Character 16/line
LCD Backlight Yes (On/Automatic/Off)
LCD Contrast 4 levels
Ethernet Port 2-Gigabit Ethernet port
Handset Wideband compliant Hearing aid compatibility (HAC)
Headset Port Yes (2.5 mm audio jack)
Electronics Hook Switch (EHS) No
Speakerphone Yes (Full Duplex) IEEE1329 compatible
Microphone Yes
Option Unit Connection No
Bluetooth (for Headset) No
PoE Yes (Class 3)
AC Adapter Yes (Option)
Wall Mount Kit Yes (Option)
Dimension (W x D x H mm) 205 x 160 x 170
FF Keys 8
Page Key No
Soft Keys No
0-9, *, # Keys Yes
Redial Key Yes
Flash/Recall Key Yes
Hold Key Yes
SP-Phone Key Yes
Auto Answer/Mute Key Yes
Auto Dial/Store Key Yes
Transfer Key Yes
Intercom Key Yes
Pause Key Yes*1
CONF Key Yes
FWD/DND Key No
Message Key Yes
Navigator Key No
4-Directions Key Yes*2
Cancel Key No
Program Key Yes*1
LED Message/Ringer Lamp Yes (Green/Red)
LED FF Keys Yes (Green/Red)
LED Intercom Yes (Green)
LED SP-Phone Yes (Red)
LED Auto Answer/Mute Yes (Red)
LED Auto Dial/Store Yes (Red)
LED CONF No
LED FWD/DND No
Self-Labelling (Desi-Less) No
Auto Redial Yes*3
Off-Hook Monitor Yes
Handset/Headset Mic Mute Yes
Speakerphone Mic Mute Yes
Phone Directory Yes
Feature Access No
Outgoing Call Log Yes
Incoming Call Log Yes
Melody Ringer No
Tone Through No
Firmware Upload Yes
Peer-to-Peer Connection Yes
VLAN Yes
QoS (DiffServ) Yes
DHCP Client Yes
Audio Codec Yes (G.722/G.711(A-law/u-law)/G.729A)
VoIP Security Yes*4
Ping Transmission Yes
IP Port Flexibility Yes
IPv6 No
Query/Announce Yes
FTP Yes
PTAP Yes
MGCP Yes
RTP Yes
Rerouting to Secondary PBX Yes
Media Relay Gateway Yes
XML Application No
LLDP-MED Yes
System Programming No
Station Programming Yes
Local Programming Yes*5
Electric Volume Headset 6 levels
Electric Volume Handset 6 levels
Electric Volume Speakerphone 8 levels
Electric Volume Ringer 4 + Off
Tones/Music Ring Tone 9
Tones/Music on Hold No (Tone)
ECO Mode Yes
Ethernet Speed/Duplex Yes (Auto/10M-Full/10M-Half/100M-Full/100M-Half)
Footnote *1Program (ordinarily)/Pause (in programming) *2 Both Navigator Key and 4-Directions Key are a kind of arrow-key. Navigator Key has ENTER button but 4-Directions Key does not have ENTER button. *3 Auto Redial feature is available on digital CO. *4 This is the authentication method which prevents malevolent people from spoofing. *5 Local Programming items (IP Address/Subnetmask/Default Gateway/MAC Address (Only display)/MGCP Server IP Address/Ping send etc.). Language: only English