• Single line support
• 3 lines LCD screen
• Full-duplex speakerphone
• Dual 10/100 switched Ethernet ports
• New English keypad version with labeled keys for the "Goodbye", "Hold" and "Redial" function among others, rather than the existing symbol keys

 Note: Power supply not included.

• Up to 9 lines support
• 6 programmable keys with LEDs
• 3 lines LCD screen
• Full-duplex speakerphone
• Dual 10/100 switched Ethernet ports
• Headset support with built-in amplifier
• PoE or AC adapter (included)
• Flash programmable
• New English keypad version with labeled keys for the "Goodbye", "Hold" and "Redial" function among others, rather than the existing symbol keys

• up to 9 lines support
• 6 softkeys with LEDs, programmable up to 20 functions
• 6 programmable keys wtih LEDs
• Graphical 144x75 pixel LCD screen
• White LED backlight
• full duplex speakerphone
• dual 10/100 switched Ethernet ports
• headset support with built-in amplifier
• PoE and AC adapter (included)
• Flash programmable
• expandable up to 3 modules of model 536M
• New English keypad version with labeled keys for the "Goodbye", "Hold" and "Redial" function among others, rather than the existing symbol keys

• Up to 9 lines support
• 12 softkeys with LEDs
  • 6 static keys programmable up to10 functions
  • 6 context sensitive keys programmable up to 20 functions
• Graphical 144x128 pixel LCD screen
• White LED backlight
• Full-duplex speakerphone
• Dual 10/100 switched Ethernet ports
• Headset support with built-in amplifier
• PoE or AC adapter (included)
• Flash programmable
• Expandable up to 3 modules of model 536M and 560M
• New English keypad version with labeled keys for the "Goodbye", "Hold" and "Redial" function among others, rather than the existing symbol keys

• same features as 57i
• no wireless infrastructure required.
• radio transceiver and antannae integrated in phone
• WDCT 2.4 GHz ISM band compliant & license free
• WDCT link from handset to desktop phone; SIP from desktop phone outward over IP
• up to 4 handsets per base
• 300,000 sq. ft. coverage area
• supports 2 simultaneous calls - one on base and one on cordless handset
• New English keypad version with labeled keys for the "Goodbye", "Hold" and "Redial" function among others, rather than the existing symbol keys

• 36 keys with LED
• Paper strip labeling
• Supported on 55i, 57i, 57i CT