System Installation Manual
Digital Key Telephone System
Arista Systems Corporation
11
28
DV
3. Equipment Requirement:
3.1 Preparation:
Survey the capacity of system and telephone.
Survey the wiring and tool.
Carefully study and follow this manual before installation.
3.2 Environment Requirement:
Input Voltage
：
AC110~240V
System Power Back-up Battery
：
Connect with DC24V power source to the battery
back-up interface to ensure a continue supply of
power during power failure.
3.3 Cable Requirement
：
：
：
：
CO Line
：
2 wires
Key Telephone
：
2 wires
SLT
：
2 wires
Door Phone
：
2 wires
Relay Switch / Sensor
：
2 wires
External Paging / External music
：
2 wires
3.4 Notice:
The main unit should be installing in a clean, dry, dust-free, and secured location. Place
10cm above the ground to avoid vibration.
Install in an environment of ventilation and prevent from direct sunbeam.
Install main unit in the center position of the extensions to shorten the distance between
main unit and extensions.
The power supply must be independent from the others. And keep away from high
frequency source and noise to avoid interference from EMI.
Use three-aperture outlet.
（
Include ground connection
）
Install ground wire of lightning rod to ensure stability of system.
Use twin wire to avoid noise and interference when the wiring is too long.
Keep away from the power cord and interference source. Otherwise, it’s necessary to
use segregate wire and indeed install ground wire.
Summary of Contents for DV-28
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