RAD Data comm E1 Manual De Usuario

 

Status Indicators and Alarm Relay 

4-1 

This chapter describes the FOM-E1/T1 diagnostics functions, which include: 
•  Front panel LED indicators 
•  Alarm relay 
•  Diagnostic loopbacks. 

In addition, this chapter provides some tips on troubleshooting and frequently 
asked questions. 

The status of FOM-E1/T1 is indicated by the front panel LED indicators. For 

description of LED indicators and their functions, refer to 

FOM-E1/T1 supports dry contact alarm relay via reserved pins of the DB-15 female 
connector. The following fault conditions trigger relay of the major and minor 
alarms: 
•  Major alarms are initiated when E1/T1 electrical input becomes lower than 

G.703 electrical levels, or bit error rate at the fiber optic interface is 10

-6

 or 

worse.  

•  Minor alarms occur when an Alarm Indication Signal is received at the E1/T1 

electrical or fiber optic interfaces.  

 lists the DB-15 connector pins used for the alarm relay. 

7, 8 

Normally Closed 

15, 8 

Normally Open 

Minor 

5, 6 

Normally Closed 

13, 6 

Normally Open 

Major