Troubleshooting Guide - Janus PBX User Manual

Troubleshooting Guide

Always visually check the phone for loose or shorted wires, physically
damaged, or missing components. The phone will not work on a Digital
phone line. It will only work on an Analog phone line or an Analog port
from a digital phone system.
Problem: Phone would not turn ʻONʼ
Possible Cause:
• Check phone line connection
• Check phone line voltage (Normal C.O. line 48-52VDC or 20-
35VDC – internal systems)
• Try connecting a fully charged 9-Volt battery
• Make sure phone line is connected to the screw terminal
connector at TELCO or the P1A modular phone jack (see P.C.
Board Diagram on page 4)
• Check if unit is pulling down line voltage (you should read the
same as the phone line voltage)
• Check voltage at controller
• Check button connection
• On an OEM style phone remove button connector and try
shorting button connection at P2 EXT- ON/OFF pins
Problem: Phone dials incorrect number
Possible Cause:
• Check number programmed into phone
• Plug a phone in the jack and call the same number you are trying
to program to see if you can call out
• Check to see if the phone is on a ring down line
• Check to see if another auto dialer is on the line and remove it
• Reprogram unit
Problem: Low or no sound through the speaker
Possible Cause:
• Check speaker connection (see P.C. Board Diagram)
• Try calling into unit and speaking to person in the car
• Try adjusting the speaker volume by calling into the phone and
when it answers press "9" twice to adjust the volume to the
maximum level.
• Check mounting of the unit. If a COP mount, remove from the COP
and re-test. If a box style, remove from the back-box and re-test.
Problem: Noise on the line
Possible Cause:
• Check if twisted shielded pair was used
• Check if shield was connected to ground at the controller end only
• Measure AC voltage on line, it should be zero
• Check button connection
• Try a spare pair of wires through traveling cable
• Check if wire is running through hoist way by itself
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