Tests and Diagnostics
GARD 8000 SYS RFL Electronics
February 14, 2011 11-36 973.334.3100
The GARD 8000 T1/E1 Interface module is capable of performing 2 loop-back tests, Local loop-back
and Remote loop-back.
Configuration and alarm status:
User Label:
This is a user-defined label. This label can identify a line number, remote substation or any
other information that may assist in identifying the interface.
Module Type:
Identified the communications interface as a T1/E1 interface.
Chassis Location:
Indicates the physical location of the communications interface in the chassis. The chassis
position, slot number, and location on the interface board, top or bottom is provided.
Configured:
Indicates that the module is properly configured. Green indicates that the modules configured, red
indicates that the module is not configured.
Major Alarm:
For the framer, a major alarm is loss of sync (RLOS). This alarm is also applied for loss of
carrier and unframed all ones; both conditions result in a loss of sync. Green indicates that the
Major Alarm is not active; red indicates that the Major Alarm is active.
Minor Alarm:
Become active when a loss of frame is detected but no loss of synch. The difference between a
minor and a major alarm is the loss of synch. Green indicates that the Minor Alarm is not
active; red indicates that the Minor Alarm is active.
Remote Alarm:
Indicates that the remote terminal is in an alarm state.
Service Enabled:
Indicates that the interface is enabled, passing information to the remote terminal. Green
indicates that the interface is enabled, red indicates that the interface is not enabled.
Loop-Back Mode Tests:
Each loop-back mode has an Enable / Disable button associated with it. By clicking on the button the
user can enable different types of loop-back tests. When a test is disabled the assigned button is green,
when a test is enabled the button will be red. The test will not start until the execute button is selected.
There is a “Loop-Back Status” indicator that will turn red and display “ACTIVE” if any of the loop-
back tests are currently being run or will be green and “DISABLED” if all loop-back modes are
disabled. The T1/E1 Interface will also issue a minor alarm while in loop-back and the Digital
Interface button on the inventory pages will be yellow.
The radio buttons next to each of the loop back tests allows the operator to enable or disable the test.
Click on the radio button to change the state and click on the “Execute” button to activate the test.
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