Fault Finding
Station Cable Continuity Check
Strata DK I&M 6/00
14-7
Fault
F
inding
Station Cable Continuity Check
Voltmeter Test
Use a voltmeter to check cable continuity between the DK40i KSU/DK424 cabinet, digital or
electronic telephone, DSS console, and the attendant console (DK424). Make tests at the modular
block. Refer to
➤
To perform the voltmeter test
1. Refer to
Chapter 10 – Universal Slot PCB Wiring
for appropriate MDF wiring diagrams in
Chapters 1 and 3.
2. Disconnect the digital or electronic telephone, DSS console, PDIU-DS, HDCB, or DDCB.
3. Using a DC voltmeter, measure between the wires of the two pairs to verify the readings
shown in
for digital telephone ports. Refer to
for electronic telephone
ports. The reading will be a plus or minus depending on meter lead placement.
4. An improper reading indicates an open, crossed or shorted wire. See
,
5. For the MDF-to-telephone (digital or electronic) cable, use an ohmmeter to make a more
precise check.
Table 14-1
Station Cable Continuity Check for Digital Telephone Cables using Voltmeter
From
To
Voltage
Pair
Wire
Color
Pair
Wire
Color
1
T
Green
1
1.
The green-red, black-yellow and white-blue measurements should be within 10%
of each other.
2
T
Black
0
1
R
Red
2
T
Black
24
2
2.
Nominal voltage—within limits of
±
26.3 ~
±
27.8VDC while under AC power,
polarity depending on voltmeter lead placements.
1
T
Green
2
R
Yellow
24
2
1
R
Red
2
R
Yellow
0
1
T
Green
1
R
Red
24
2
2
T
Black
2
R
Yellow
24
2
Summary of Contents for Strata AirLink DK40i
Page 22: ...Introduction Related Documents Media xx Strata DK I M 6 00 ...
Page 48: ...DK14 Installation DK14 Wiring Diagrams 1 26 Strata DK I M 6 00 ...
Page 220: ...DK424 Installation Remote Cabinet Installation Instructions 5 68 Strata DK I M 6 00 ...
Page 262: ...DK424i Configuration Primary Reserve Power Cabinet Hardware 6 42 Strata DK I M 6 00 ...
Page 450: ...Universal Slot PCB Wiring Option Interface PCB Wiring Diagrams 10 42 Strata DK I M 6 00 ...
Page 592: ...Peripheral Installation Enhanced 911 Service E911 12 84 Strata DK I M 6 00 ...
Page 616: ...ACD Installation Spectrum Electronic Wall Boards 13 24 Strata DK I M 6 00 ...
Page 634: ...Fault Finding Fault Isolation Flowcharts 14 18 Strata DK I M 6 00 ...
Page 704: ...ISDN Interfaces ISDN Disconnect Cause Code 16 54 Strata DK I M 6 00 ...
