• Digital single-line non-display model

• Supported on a TDL module

4400D

• Digital single-line with display model 

• 2-line by 16-character LCD display

• Conference/Transfer/Redial buttons

• Supported on a TDL module

4406D+

• Digital multi-line model with display model

• 2-line by 16-character LCD display

• 6 user-programmable feature buttons

• Conference/Transfer/Redial buttons

• Separate jack for optional headset

• 2-way speakerphone

4412D+

• Digital multi-line with display model 

• 2-line by 24-character LCD display

• 12 programmable line/feature buttons

• 12 feature-only buttons

• 4 softkeys for browsing features

• 4 navigation keys for browsing features

• Conference/Transfer/Redial buttons

• Separate jack for optional headset

• 2-way speakerphone with improved speakerphone quality

• Digital multi-line with display model

• 2-line by 24-character LCD display

• 24 programmable feature buttons

• 4 softkeys for browsing features 

• 4 navigation keys for browsing features

• Conference/Transfer/Redial buttons 

• DLC (Direct Line Console) for attendant

• Separate jack for optional headset

• 2-way speakerphone with improved speakerphone quality

• Digital multi-line model with display 

• 7-line by 24-character VFD display

• 24 programmable feature buttons

• 10 softkeys for browsing features

• 4 navigation keys for browsing features 

• Can configure the MERLIN MAGIX Integrated System without PC

• Separate jack for optional headset

• 2-way speakerphone with improved speakerphone quality

• Can be connected to 4424D+ and 4424LD+

• 50 buttons, 150 extension numbers for each DSS

• Shows busy/idle status of all phones

• One-touch dialing for inside extension

• One-touch transfer