Avaya 5420 Phone Manual

The Avaya 5420 Digital Deskphone is a feature-rich business telephone designed for use with Avaya IP Office and other compatible communication systems. It offers a high-resolution display, programmable line/feature keys, speakerphone, headset support, and extensive call management features. Below are key sections covering 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: High-resolution monochrome display, 24 programmable buttons, Speakerphone, Headset jack, Volume controls, Message Waiting Indicator.

Feature	Description
Display	2-line, 24-character monochrome LCD with backlight
Programmable Buttons	24 buttons for line appearances, speed dial, or feature access
Speakerphone	Full-duplex hands-free speaker with mute
Headset Jack	2.5mm jack for headset connectivity
Volume Controls	Separate controls for ringer, speaker, and handset
Message Waiting Indicator	LED for visual message notification
Hold Button	Single-touch call hold
Conference Button	Easy conference call setup
Transfer Button	Call transfer functionality
Mute Button	Microphone mute during calls

Installation

Unpack and inspect contents. Place on stable desk surface.

Connect to network: Plug the telephone line cable into the wall jack and the phone's LINE port.
Connect handset: Attach coiled cord to handset and HANDSET port on phone.
Connect power: Use provided power adapter (if required by system).
Optional headset: Plug headset into 2.5mm jack on side of phone.

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

First-Time Setup

Power on phone; follow system prompts.

System registration: Phone should auto-register with IP Office system; check with administrator.
Set date/time: Configure via phone menu or system administrator.
Program buttons: Use ADMIN menu to assign functions to programmable keys.
Adjust volume: Set ringer, speaker, and handset volume to preferred levels.

CAUTION! Do not attempt internal repairs. Contact qualified service personnel.

Specifications

Display: 2-line x 24-character monochrome LCD with backlight.
Network: Digital (TDM) or IP (depending on model).
Audio: Wideband audio support, noise-canceling microphone.
Connections: RJ-45 for network, RJ-9 for handset, 2.5mm headset jack.
Programmable Keys: 24 buttons with dual-color LEDs.
Supported Protocols: Avaya Digital Protocol, H.323 (IP models).
Power Source: 48V DC from system or external power adapter.
Operating Temp: 32°F to 104°F (0°C to 40°C).

Controls and Settings

Access menu via MENU button. Front Panel: Volume controls, MUTE, HOLD, CONFERENCE, TRANSFER.

Programmable Keys: Can be set as line appearances, speed dial, call log, or feature access (Voicemail, Forward, etc.).

Basic Settings: Ringer type/volume, display contrast, date/time format. Advanced Settings: Button programming, call forwarding, do not disturb, network settings (IP models). System Features: Call pickup, park, intercom, bridged call appearance.

Connecting Devices

Network: RJ-45 cable to wall jack. Handset: RJ-9 cable. Headset: 2.5mm plug.

Ensure phone and system are powered off before connecting.
Match cables to correct ports (network cable to LINE port).
For IP models, configure network settings via menu or DHCP.

Tip: Use quality CAT5e or better cable for network connections.

Advanced Call Features

Supports standard and advanced telephony features.

Make call: Lift handset or press SPEAKER, dial number.
Answer call: Lift handset, press SPEAKER, or press flashing line key.
Hold: Press HOLD button; resume by pressing same line key.
Transfer: During call, press TRANSFER, dial target, press TRANSFER again.
Conference: During call, press CONFERENCE, dial participant, press CONFERENCE to join.
Call Forward: Program via menu or feature code (*72 forward on, *73 cancel).
Speed Dial: Store numbers on programmable keys for one-touch dialing.
Call Log: Access missed, received, and dialed calls via menu.

WARNING! Do not use phone during electrical storms. Unplug during lightning activity.

Accessibility Features

Visual Alerts: Flashing LED for incoming calls/messages. Audio Adjustments: Variable ringer volume and tone. TTY Compatible: Can be used with TTY devices with proper adapter.

Care & Cleaning

Unplug before cleaning. Use slightly damp cloth for exterior; dry immediately. Do not use abrasive cleaners or solvents.

CAUTION! Keep liquids away from phone. Do not spray cleaners directly on device.

Regulatory Information

FCC Part 15 & 68: Complies with limits for Class B digital devices and telephone equipment. Industry Canada CS-03 compliant. Copyright © Avaya Inc. All rights reserved. For technical support, contact your system administrator or visit support.avaya.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No display/power	Power/connection	Check power adapter connection; verify system power.
No dial tone	Cable/configuration	Check line cable; contact administrator for configuration.
Can't make/receive calls	Network/registration	Ensure phone is registered to system; check network cables.
Poor audio quality	Cables/interference	Check handset/headset cables; move away from electrical interference.
Buttons not working	Programming	Re-program buttons via ADMIN menu; reset to defaults if needed.

Reset: Menu > Admin > Reset (consult administrator first).

Service: Contact system administrator or Avaya support at support.avaya.com.