Specifications

FOMi-E1/T1 Installation & Operation Manual Chapter 4. Troubleshooting & Diagnostics
Diagnostic Tests 4-7
REM
LLB
TESTS
LLB
LEDS CHECK
RLB+BERT
BERT
RLB
STATUS
TESTS
LINE CONFIG
DTE CONFIG
ALARM BUFFER
REM
LOC
ON
ON
OFF
Figure 4-3 FOMi-E1/T1 Tests Menu - LLB
The TEST indicator lights up. FOMi-E1/T1 digital interface is now connected
to its own DTE data output via most of the modem circuits.
10. Perform this procedure at both ends.
11. If the BERT indicates the correct position, but the data terminal indicates
a fault, follow the manufacturer’s procedures to test the data terminal
and verify that the cable is properly connected between the terminal
and the FOMi-E1/T1 unit.
12. After completion of the test (or when the fault has been corrected),
deactivate the LLB test.
13. To stop the test, press the SCROLL button until OFF is displayed and
then press the ENTER button.
The message WAIT... is displayed on the local modem LCD and the test
is terminated.
Remote Digital
Loopback (RLB)
The Remote Digital Loopback (RLB) test determines the performance of
both the local and the remote FOMi-E1/T1 units, as well as their
connecting lines. The Remote Digital Loopback test provides a loopback at
the remote modem.
G.703
DATA
FIBER
FIBER
FIBER
FIBER
RCVR
XMTR
LOCAL
DATA
TERMINAL
RCVR
XMTR
REMOTE
DATA
TERMINAL
REMOTE FOMi-E1/T1LOCAL FOMi-E1/T1
G.703
DATA
AIS
Figure 4-4 FOMi-E1/T1 in Remote Digital Loopback (RLB)