Verilink NCC 2130 (880-503285-001) Product Manual - Manual (Page 43)

Verilink NCC 2130 User Manual 5-1
Chapter
5
Diagnostics
While installing your NCC 2130, or after it has been placed into
service, the Diagnostic routines allow you to troubleshoot or verify
the T1 circuit and Verilink equipment.
Light Emitting Diodes (LEDS) on the NCC 2130 front panel provide a
visual indication of alarm and status conditions. The Diagnostics
Menu provides current information about possible alarm
conditions and offers command options which can be used to
establish and terminate loopbacks and test patterns.
Using Diagnostics
A typical way to use the Diagnostics Menu might involve the
following steps:
1. Establish a loopback somewhere in the circuit path.
2. Start transmitting a test pattern.
3. Observe the test error counter to see if the test pattern is
received as it was sent.
a. If no errors are observed, move the point of loopback
further away to test more of the circuit path, or
b. If errors are observed, move the point of loopback closer
to determine the source of the problem.
4. Stop the test pattern, drop all loopbacks, then:
a. Place the T1 circuit back into service if all tests passed, or
b. Contact the appropriate vendor if a problem was found.
Alarm Status In addition to offering the ability to put up and take down
loopbacks and test patterns, the Diagnostics Menu also offers
information about the current status of the DTE interface and the
T1 network interface.
The top area of the Diagnostics Menu includes a drawing made up
of ASCII characters representing the operation of the CSU. The
equipment interface is shown on the left and the network interface
is shown on the right. In the area to the left and right of the line
drawing of a framer, status information is represented by words
displayed in upper case characters.