Cable Installation Test - Toshiba strata CT Installation & Maintenance Manual

Fault Finding

Cable Installation Test

If cable voltmeter and ohmmeter tests are within limits, digital telephones, DDCBs, or DDSS
consoles may not operate.
➤
To perform the cable installation test
1.
2.
3.
Table 8-3 Station Cable Continuity Check for Digital Telephone Cables using Ohmmeter
Pair
1
H
1
1
1
1
2
C
8-6
Cable runs for the above digital devices must be free of cable splits (single or double).
Test for and eliminate all cable splits.
Cable bridge taps – Digital telephones will not operate if cable runs contain any type
(short or long) of cable bridge. Test for and eliminate all cable bridges.
When installing the station cable, do not run parallel to and within 3 ft. of an AC power
line. AC power lines should cross at right (90
station wire pairs near devices that generate electrical noise, such as neon or fluorescent
light fixtures.
From
Wire Colour
1
T Green
R Red
T Green
R Red
T Green
T Black
) angles only. In particular, avoid running
°
To
Pair Wire
2 T
2 T
2 R
2 R
1 R
2 R
Strata CT I&M Manual October 2000
Voltage
Colour
Black open
Black open
Yellow open
Yellow open
2
Red 40 ohms
2
Yellow 40 ohms