Verilink PRISM 3101 (34-00212) Product Manual - Manual (Page 35)

Testing 4-1 PRISM 3101/3102
4. Testing
This chapter describes hardware and software testing proce-
dures and responses for the PRISM 3101/3102.
Hardware Testing
The PRISM 3101/3102 front panel (Figure 4-1) has five
LED indicators and two control buttons from which you can
perform basic unit testing.
Front Panel LEDs
Five front panel LEDs allow a visual identification of the
test results and alarms. These LEDs are: NET, BACKUP,
TEST, ALARM, and POWER.
NET
This LED is green when the unit is in frame sync. It is
amber when the unit is receiving a yellow alarm from far
end. It is red when the unit is out of frame sync and/or Loss
of Signal.
BACKUP
Amber LED blinks when dialing, connecting, or disconnect-
ing. Solid illumination when active.
TEST
This LED flashes green when the unit is transmitting loop
code. It is green continuously when BERT is on with no
errors OR the unit is in clear test. It is red when the BERT is
on and is receiving errors.
ALARM
Red LED lights continuously when the unit is in an active
alarm condition. It flashes when an invalid switch configura-
tion has been made.
POWER
Green LED lights continuously when power is applied to the
unit.
Front Panel Buttons
Two front panel buttons allow you to perform loopback
tests. The two buttons are: TEST and LOOP.
TEST
When this button is pushed once, the unit transmits five sec-
onds of in-band loop code out to the network either LLB or
V.54 depending on the setting of configuration Switch S2-7
(page 3-2). The indicator blinks green during transmission
of the loop code.
If configuration Switch S2-8 (page 3-2) is set to Clear
Loop, a bidirectional loop is created allowing the central
office to initiate a BERT.
If Switch S2-8 is set to BERT, the test pattern last selected
in the terminal interface is transmitted toward the network.
The received pattern is compared and if the pattern is
received error free, the TEST indicator remains green. If
pattern errors are detected, the TEST indicator turns red for
one second for each errored second. Therefore, if five
errored seconds are received, the indicator will remain red
for five seconds. The data ports are looped back toward the
DTE during the test.
If the TEST button is pushed again, the unit transmits five
seconds of in-band loop down code and returns to normal
operating mode. The TEST indicator is then turned off.
LOOP
When this momentary push button is pushed once, the unit
activates a line loopback, looping the network receive data
back to the network, and looping the data from the DTE
ports back to the DTE. The TEST indicator is illuminated
while the unit is in loop. If pushed again, the unit clears the
loop and turns off the LOOP indicator.
For additional information concerning test and
loop options, refer to the section Software Con-
figuration on page 3-3.
Software Testing
When indepth testing is necessary, you can perform specific
tests from the VT100 interface into the PRISM 3101/3102
menu system.
ALARM TEST BACKUP NET
TEST LOOP
POWER
PRISM 3100 Series
T R A N S P O R T
®
Figure 4 -1 Front Panel Controls and Indicators