Mitel 8528 Telephone Manual

The Mitel 8528 is a feature-rich digital business telephone designed for use with Mitel communications platforms. It offers a high-resolution display, programmable feature keys, speakerphone, headset compatibility, and support for multiple lines. 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. Basic Operations 8. Advanced Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: High-resolution backlit display, Programmable feature keys, Speakerphone, Headset jack, Message waiting indicator, Volume controls.

Feature	Description
Display	High-resolution backlit LCD for call information and menus
Programmable Keys	12 programmable keys for speed dial, features, or line appearances
Speakerphone	Full-duplex hands-free speakerphone
Headset Jack	2.5mm jack for headset connectivity
Message Waiting Indicator	LED indicator for voice messages
Volume Controls	Separate controls for ringer, speaker, and handset
Mute Button	Mutes microphone during calls
Hold Button	Places active calls on hold
Navigation Keys	Arrow keys for menu navigation
Power Connection	Powered through network cable (PoE) or optional power adapter

Installation

Unpack and inspect contents. Place on stable surface.

Connect to network: Use Ethernet cable to connect to PoE switch or injector.
Connect handset: Plug coiled handset cord into handset jack.
Optional headset: Connect to 2.5mm headset jack if needed.
Power connection: Use PoE or connect optional power adapter to DC jack.

WARNING! Use only Mitel-approved power adapters. Ensure network cable is securely connected.

First-Time Setup

Power on phone; follow on-screen prompts.

Network registration: Phone will automatically attempt to register with Mitel system.
Set language: Press MENU, navigate to Settings > Language, select preferred language.
Program feature keys: Press MENU, navigate to Features > Programmable Keys.
Adjust volume: Use volume keys to set ringer, speaker, and handset levels.

CAUTION! Do not disconnect during firmware updates. Ensure stable network connection.

Specifications

Display: High-resolution backlit LCD, 4 lines of text.
Network: 10/100 Mbps Ethernet, PoE IEEE 802.3af compliant.
Audio: Wideband audio support, G.711, G.729 codecs.
Connectors: Ethernet (RJ45), Handset (RJ9), Headset (2.5mm), Power (DC jack).
Programmable Keys: 12 keys with dual-color LEDs.
Supported Protocols: SIP, MiNet.
Power Source: PoE or 48V DC power adapter.
Operating Temp: 0°C to 40°C (32°F to 104°F).

Controls and Settings

Access menu via MENU button. Front Panel: Speakerphone, Mute, Hold, Navigation arrows, Volume controls.

Programmable Keys: Can be configured for speed dial, call forwarding, do not disturb, park, pickup, etc.

Settings: Language, Time/Date, Ring Tones, Display Contrast, Network Settings. Features: Call Forwarding, Do Not Disturb, Call Park, Call Pickup, Conference, Transfer.

Connecting Devices

Network: RJ45 Ethernet port. Handset: RJ9 connector. Headset: 2.5mm jack.

Turn off phone before connecting devices.
Match cables to ports (Ethernet to network port).
For headset use, may need to enable headset mode in settings.

Tip: Use quality CAT5e or higher Ethernet cable for reliable PoE.

Basic Operations

Making and receiving calls, hold, transfer, conference.

Make call: Lift handset or press Speakerphone, dial number.
Answer call: Lift handset, press Speakerphone, or press flashing line key.
Hold: Press HOLD button during active call.
Transfer: During call, press TRANSFER, dial target number, press TRANSFER again.
Conference: During call, press CONFERENCE, dial second party, press CONFERENCE again to connect.
Volume adjustment: Use volume keys during call or from idle state.
Mute: Press MUTE to toggle microphone on/off.

WARNING! Do not use excessive force on keys or handset cord.

Advanced Features

Speed Dial: Program numbers to programmable keys. Call Forwarding: Forward calls to another number. Do Not Disturb: Block incoming calls with customizable message. Call Park: Park call for retrieval from another phone.

Care & Cleaning

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

CAUTION! Avoid liquids near openings. Do not spray directly on phone.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © Mitel Networks Corporation. For support, visit www.mitel.com or contact your authorized Mitel dealer.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	PoE/Power adapter	Check Ethernet/Power connection; ensure PoE switch is powered.
No display	Power/Contrast	Check power; adjust display contrast in settings.
No dial tone	Network/Registration	Check network cable; verify phone is registered to system.
Cannot make/receive calls	Configuration	Verify extension is properly configured on PBX.
Poor audio quality	Network/Connections	Check network for packet loss; ensure handset cord is secure.

Reset: Press and hold # key during power-up for factory reset (caution: erases all settings).

Service: Contact authorized Mitel dealer or visit www.mitel.com/support.