Chapter 5 Troubleshooting
Mechanical
5-3
TC1920 Rev 1.3 User Manual
5.3
Mechanical
This section will inform you about the types of problems associated with
environmental or cabling issues that lead to replacing and installing the
component or housing.
5.3.1
Environment
The location and the environmental condition can contribute to problems
encountered with system operation.
5.3.2
Cabling
There are two types of interface connectors used on the TC1920 front panel.
•
RJ-11 (Registered Jack) is used for the FXS lines. The standard
connector is used on 2-pair (4-wire) telephone lines.
•
The RJ-45 socket fits an 8-position modular connector that looks like a
large phone plug. The connector is the weak point in any ethernet
cable. See
Ethernet Port RJ-45 Pin Assignment,
Table 5-1: Environmental Errors
Symptoms
Possible Cause
Actions
Intermittent signal or power loss
with an alarm.
Indications of damage to the cable or
connectors.
a. Replace the cables.
There is a front panel alarm and
verification on Unit Alarm Status
shown as a temperature alarm.
The operating area is not free from
extremes of temperature or humidity
beyond the specifications.
Provide protection from
extreme conditions as shown
in
or replace with upgraded
model.
NOTICE
If copper cable(s) connected to TC1920 unit(s) are located outside
buildings or enclosures (even at minimal distances), TC1920 units
may be damaged by lightning and/or electrical power surges.
Adding protective devices (surge suppressors/lighting protectors) to
each copper cable that is exposed to potential lightning strikes or
power surges is highly recommended. Please be aware that adding
such protective devices can't guarantee 100 percent protection for
connected electronic equipment. You should contact a professional
lightning/surge protection consultant for specific questions regarding
your application.
