Matrix ETERNITY NE System Manual 9
The Digital Key Phone Interface has the following features:
• Programmable Call Capacity - up to 10 Call Appearances/Call Loops on a single DKP.
• Selectable Headset and Speaker (Hands-free) modes.
• Selectable Auto Answer mode.
• Programmable Headset Speech Tx and Rx Gains.
• Programmable Hands-free (Speaker) Speech Tx and Rx Gains.
• Programmable Key Click Volume levels. 
• Programmable Key Maps for Operator, Executive, Hotel Attendant and Guests.
• 4-Level Adjustable Backlight and Contrast Controls
• Selectable Ring Types.
• Ringer Volume Control.
• Programmable Ringer Modes - Ring Immediately, Ring if Idle, Ring after Delay, Ring Off.
• Ring On Speakerphone and Ring on Headset options.
The Single Line Telephone Interface 
The Single Line Telephone (SLT) Interface allows any standard, two-wire, analog single line telephone instrument - 
rotary, pulse-tone, cordless, feature phones with or without Calling Line Identification - to be connected to the 
ETERNITY as extension phone.
The SLT Interface has the following features:
• Selectable Caller ID Presentation - DTMF, FSK
• Programmable Ring Type - Trapezoidal, Sinusoidal, Low Trapezoidal, Low Sinusoidal. 
• Programmable AC Impedance - 600, 900, 350 + (100 || 0.21uF), 220+ (820 || 120nF).
• Selectable Answer Signaling.
• Selectable Disconnect Signaling - Polarity Reversal, Open Loop Disconnect.
• Programmable Speech Rx Gain.
• Programmable Speech Tx Gain.
• Programmable Flash Timer.
• Programmable Loop Current. 
• Fax machine connectivity.
Voice Mail System (VMS)
ETERNITY NE supports a full-fledged, 'in-skin' Voice Mail System to provide mailbox facility to all its extensions 
(DKP, SLT and SIP). 
The key auto attendant and voice mail features supported by ETERNITY's Voice Mail System are: 
• Programmable Mailbox Size.
• Programmable Message Length.
• Welcome greetings according to the time of the day.
• Different voice greetings for different time zones.
• Special greetings for holidays.
• Five call transfer types: none, blind, wait for ring, wait for answer, and screened.
• Dial by extension.
• Dial by name.
• Personalized greetings for each mailbox.
• Individual mailbox size.
• Call forward to Voice Mail.
• Message forwarding.
• Distribution lists.