Installation Guide
Tools Needed:
- Telephone cable crimper
- RJ11/RJ45 connectors
- Screwdrivers (flat and Phillips)
- Wire stripper
- Cable tester
Step-by-Step Installation
- Choose Installation Location: Select a location near telephone jacks and power outlets on a stable surface.
- Unpack the Phone: Remove all packaging materials and protective covers from the telephone unit.
- Connect Telephone Line: Connect the telephone cable to the wall jack using RJ11 connectors. Ensure proper wiring configuration.
- Power Connection: Connect the power adapter to the phone and plug into a properly grounded electrical outlet.
- Handset Connection: Connect the coiled handset cord to both the handset and base unit.
- System Configuration: Program extension numbers, ring tones, and other system settings as required.
- Test Operation: Test the phone by making internal and external calls to verify proper installation.
Specifications
| Model Series | 6408D+/6416D+ |
| Type | Digital Desk Phone |
| Color | Charcoal Gray / Beige |
| Display | 2-line 24-character LCD |
| Line Capacity | Up to 6 programmable lines |
| Ringer Type | 8 programmable ring tones |
| Power Requirements | 48V DC from system or external power |
| Dimensions (HxWxD) | 22 x 22 x 10 cm |
| Weight | 1.2 kg |
| Compatibility | Avaya Definity, Merlin, Partner systems |
| Connector Type | RJ11 for line, RJ45 for digital |
| Frequency Response | 300 Hz - 3400 Hz |
Warranty Information
- Full Warranty: 1 year parts and labor
- Extended Support: Available for legacy systems
- Additional Coverage: Optional maintenance contracts available
For warranty service, contact Avaya Customer Service at 1-888-288-2992 or visit Avaya.com
Key Features
Digital Voice Quality
Clear digital audio transmission with noise reduction technology for crisp, clear conversations even in noisy environments.
Programmable Line Keys
Multiple line appearances with LED indicators for call status monitoring and quick access to frequently used extensions.
Speed Dial Memory
Store up to 100 speed dial numbers for quick access to frequently called internal and external contacts.
Call Logging
Automatic logging of incoming, outgoing, and missed calls with time and date stamps for easy reference.
Conference Calling
Built-in conference capability allowing up to 3-party calls for efficient business communications.
Message Waiting Indicator
Visual and audible indicators for voice mail messages with message count display.
Function Key Programming
Line Appearance
Direct station selection for monitoring multiple extensions
Speed Dial
One-touch dialing for frequently called numbers
Call Park
Temporary call holding for retrieval from any phone
Transfer
Blind and supervised call transfer options
Forwarding
Programmable call forwarding to other extensions
Do Not Disturb
Temporary call blocking with override capability
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No dial tone | Line disconnected, system power issue | Check line connections, verify system power, test with known working phone |
| Static on line | Bad cable, connector issues, line interference | Replace telephone cable, check connectors, test different line |
| Display not working | Power issue, display failure | Check power connection, reset phone, contact technician |
| Cannot make calls | System programming, line restriction | Verify system programming, check call restrictions, test internal calls |
| One-way audio | Wiring issue, handset problem | Check all connections, test with different handset, verify wiring |
| Buttons not responding | Keypad failure, system issue | Reset phone, check for physical damage, contact support |
Error Codes
- No Display: Power issue - Check power supply and connections
- Flashing Lights: System error - Reset phone and check system status
- Busy Signal: Line busy - Wait and retry or use different line
- Fast Busy: System problem - Contact system administrator
- No Ring: Ringer issue - Check ringer settings and volume
- Display Garbled: Display failure - Reset phone or replace unit
Manual Downloads
Current Model Manuals
6408D+
8-Line Digital Phone
6416D+
16-Line Digital Phone
6424D+
24-Line Digital Phone
6408D+M
8-Line with Module
Popular Previous Models
6408D
Original 8-Line Phone
6416D
Original 16-Line Phone
7400 Series
Basic Digital Phone
8400 Series
Advanced Digital Phone