800-357-104-01, Revision 01
Troubleshooting and System Testing
HMS-357 List 4 and List 5
September 29, 2000
69
I
NSTALLING
A
T
EST
C
ARD
(HTC) (O
PTIONAL
)
The HTC-319 Test Card provides you with an easy method of testing Central Office (CO) and Field Tip and Ring
transmit and receive pairs.
Figure 38.
Installing a Test Card into the HMS-357
Step
Procedure
Installer Check
ü
ü
ü
ü
Whenever installing or removing units from the HMS-357 chassis, be sure to wear an
antistatic wrist strap and connect it to the ESD strap input.
1
If you have not already done so, open the chassis front cover by unscrewing the two hold-down lugs
on the upper corners. The cover folds down.
H
2
Be sure to plug your ESD wrist strap into the ESD above the HMU slot.
H
3
Plug the HTC-319 into the shelf slot whose circuits you want to test.
H
4
Set the four-position slide switch (S1) on the HTC-319 to the type of test you want to perform (LOOP
BACK, LOOP THRU, SHORT, or OPEN).
H
5
Monitor the circuits at the corresponding test points on the card. The number of each test point
corresponds to the edge connector pin of the circuit under test.
H
6
When testing is complete, remove the test card, close the front cover, and then screw in the two
hold-down lugs.
H
7
If you plan to test a line unit, proceed to
“Line Unit Testing” on page 71
.
The Wideband System 3190 should now be operational. If you experience any difficulties at this
time, refer to
“Troubleshooting and System Testing” on page 67
.
H
Installer Signature
?
?
?
?
Date
HTC-319
E
strap input
SD
