Panasonic KX NT553 Phone Manual

The Panasonic KX NT553 is a versatile business IP phone designed for modern office environments. It features a large color LCD display, support for VoIP (SIP), multiple line appearances, HD voice quality, integrated Gigabit Ethernet, PoE support, programmable keys, headset compatibility, and advanced call handling features. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Advanced Call Features 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Large color LCD display, Handset, Base unit, Ethernet ports, Programmable keys, Headset jack.

Feature	Description
Display	Large color LCD with adjustable angle
Network Ports	Dual Gigabit Ethernet (LAN, PC) with PoE support
Handset	HD Voice quality with noise reduction
Programmable Keys	Multiple soft keys and dedicated buttons for speed dial, call functions
Headset Jack	3.5mm jack for hands-free operation
Power Input	DC input or Power over Ethernet (IEEE 802.3af)
Volume Controls	Separate controls for handset, speaker, ringer
Conference	Support for multi-party conference calls
Message Waiting Indicator	LED for voicemail notification
Protocol Support	SIP (Session Initiation Protocol)

Installation

Unpack and inspect contents. Place on stable desk surface.

Connect to Network: Use Ethernet cable to connect LAN port to your network switch/router. For PoE, ensure switch supports IEEE 802.3af.
Connect PC (Optional): Use second Ethernet port (PC) to connect your computer for pass-through networking.
Connect Handset: Plug coiled handset cord into designated jack on base unit.
Connect Power: If not using PoE, connect the provided AC adapter to DC input and wall outlet.
Connect Headset (Optional): Plug 3.5mm headset into headset jack.

WARNING! Use only the provided power adapter. Ensure cables are not pinched or damaged.

First-Time Setup

Power on phone; follow initial configuration prompts on display.

Network Configuration: Phone will attempt DHCP. For static IP, access network settings via menu.
SIP Account Registration: Enter SIP server address, username, password, and authentication details provided by your VoIP service provider.
Set Language: In SETTINGS menu, select preferred language (default ENGLISH).
Set Date/Time: Configure time zone and synchronization method (NTP or manual).
Program Keys: Assign functions (speed dial, call transfer, etc.) to programmable keys.
Test Call: Make a test call to verify audio quality and registration.

CAUTION! Handle handset cord with care to avoid internal wire damage.

Specifications

Display: 3.5-inch color TFT LCD (320 x 240 pixels).
Protocol: SIP RFC 3261.
Audio Codecs: G.711, G.722 (HD), G.729, G.726.
Network: Dual 10/100/1000 Mbps Ethernet ports, IEEE 802.3af PoE.
Programmable Keys: Up to 6 soft keys, multiple dedicated function keys.
Call Features: Hold, Transfer, Conference, Forward, Call Waiting, Redial.
Power Supply: Input: 100-240V AC, 50/60Hz; Output: 5V DC or PoE.
Operating Temp: 0°C to 40°C (32°F to 104°F).
Supported Services: Voicemail indicator, XML browser for custom services.

Controls and Settings

Access menu via dedicated MENU button or soft keys. Front Panel: LCD, Navigation keys (Up/Down/Left/Right/OK), Volume keys, Mute, Headset, Speakerphone, Hold, Transfer.

Soft Keys: Context-sensitive functions displayed on screen (e.g., DND, Directory, History).

Settings Menu: Network (IP, DHCP, DNS), SIP Account (registration, server), Audio (handset/speaker volume, tone), Time/Date, Key Programming, System (language, reset).

Connecting Devices

Network: LAN port to switch. PC: PC port to computer. Headset: 3.5mm jack.

Ensure phone is powered off before making connections.
Use standard CAT5e or higher Ethernet cables.
For PoE, verify switch capability; phone will power on automatically.
After connections, power on. Check LED indicators for network and registration status.

Tip: Label cables for easy identification during maintenance.

Advanced Call Features

Supports standard and advanced telephony functions.

Make Call: Lift handset or press Speakerphone, dial number, press Dial soft key or wait for auto-dial.
Answer Call: Lift handset, press Speakerphone, or press Answer soft key.
Hold: Press HOLD button during active call.
Transfer: Press TRANSFER, dial target number, announce call, press TRANSFER again to complete.
Conference: During first call, press CONFERENCE, dial second party, press CONFERENCE again to merge.
Forward Calls: Menu > Call Features > Call Forward, set mode (Always, Busy, No Answer).
Speed Dial: Program keys for one-touch dialing.
Call History: Press HISTORY key to view missed, received, dialed calls.
Do Not Disturb (DND): Activate via soft key or menu to silence ringer.

WARNING! Do not use liquid or aerosol cleaners on any part of the phone.

Accessibility Features

Adjustable Ringer Volume: Multiple levels including high for noisy environments. Visual Alerts: Flashing LED for incoming calls. Hearing Aid Compatible (HAC): Handset meets relevant standards. Large Font Option: Can be enabled in display settings.

Care & Cleaning

Disconnect power before cleaning. Use a soft, dry cloth to wipe exterior. For stubborn marks, dampen cloth slightly with water; do not apply directly to phone.

CAUTION! Never use abrasive cleaners, solvents, or sprays. Avoid getting moisture into openings.

Regulatory Information

FCC Part 15: Class B digital device; complies with limits for residential installation. CE Mark: Conforms to European directives. Ringer Equivalence Number (REN): 0.1B. For technical support and warranty information, visit www.panasonic.com or contact Panasonic customer service at 1-800-211-7262.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power / No display	Power connection, PoE	Check AC adapter connection; verify PoE switch is enabled; try different Ethernet cable.
No dial tone	Network/SIP registration	Check Ethernet link LED; verify SIP account credentials and server address; restart phone.
Cannot make/receive calls	Firewall, network settings	Check router/firewall SIP ALG settings; confirm correct IP configuration (DHCP/static).
Poor audio quality	Network congestion, codec	Check network bandwidth; try different audio codec (e.g., G.711); ensure cables are secure.
Keys not responding	Software lock, defect	Restart phone; perform factory reset if necessary (see manual for procedure).
Display is blank or garbled	Power, contrast settings	Check power; adjust display contrast in settings menu.

Reset: Menu > System > Factory Reset (Note: Erases all configuration).

Service: 1-800-211-7262; www.panasonic.com/support