Fault Isolation Flowcharts - Toshiba strata CT Installation & Maintenance Manual

Table 8-4
Pair
1
1
1
1
1
2
3
3
3
3
H
3
3
3
3
1.
C The green-red, black-yellow and white-blue measurements should be within 10% of each other.
2.
This is the maximum allowable reading for all digital and electronic telephone cable runs except if connecting an
HDSS console to circuits 7 and 8 of a PEKU, then the maximum cable restriction is 20 ohms, not 40 ohms.

Fault Isolation Flowcharts

Strata CT I&M Manual October 2000
Station Cable Continuity Check for Electronic Telephone Cables using
Ohmmeter
From
Wire Colour
T Green
R Red
T Green
R Red
T Green
T Black
T White
T White
R Blue
T White
R Blue
T White
R Blue
T White
The following troubleshooting flowcharts are available to aid in fault isolation. Toshiba
recommends reading the previous text in this chapter before proceeding to
Page 8-8 to begin fault isolation.
Pair
1
2
2
2
2
1
2
3
1
1
1
1
2
2
2
To
Wire Colour
T Black
T Black
R Yellow
R Yellow
R Red
R Yellow
R Blue
R Red
R Red
T Green
T Green
T Black
T Black
R Yellow
Flowchart 8-1 on
Fault Finding
Voltage
open
open
open
open
2
40 ohms
2
40 ohms
2
40 ohms
open
open
open
open
open
open
open
8-7