Toshiba Strata Dk14, Dk40i, Dk424 Installation And Maintenance Manual

Fault Finding
Station Cable Continuity Check
Strata DK I&M 5/9912-9
Fault Finding
Cable Installation Test
If cable voltmeter and ohmmeter tests are within limits, digital telephones, DDCBs, or DDSS 
consoles may not operate.
ä
To perform the cable installation test
1. Cable runs for the above digital devices must be free of cable splits (single or double). Test for 
and eliminate all cable splits.
2.Cable bridge taps – Digital telephones will not operate if cable runs contain any type (short or 
long) of...

Fault Finding
Fault Isolation Flowcharts
12-10Strata DK I&M 5/99
Fault Isolation Flowcharts
The following troubleshooting flowcharts are available to aid in fault isolation. Toshiba 
recommends reading the previous text in this chapter before proceeding to Flowchart 12-1 on Page 
10 to begin fault isolation.
START
Please read 
Chapters 2 and 3 
before 
proceeding.
Is the
system completely
non-operational?
Is it a station
no dial tone
fault?
Is it a CO
line no dial
tone fault?
Is a DSS
console non-...

Fault Finding
Fault Isolation Flowcharts
Strata DK I&M 5/9912-11
Fault Finding
Flowchart 12-2 Catastrophic Faults
START
Is the system
completely
non-operational?
Was the fault
isolated by completing
the system hardware
check?
Was the
fault cleared
after re-initializing
the system?
Call your
technical support
group. Does the fault
re-occur after
entering customer
database? Reprogram customer
database, one program
at a time, and check
to see if fault re-occurs.Tag the defective
unit(s) and return
for...

Fault Finding
Fault Isolation Flowcharts
12-12Strata DK I&M 5/99
Flowchart 12-3 Station Dial Tone Faults
START
Repair if necessary.
Is the fault
cleared?3-1 END Yes
Is the 
faulty station on a 
replaceable station 
PCB?
3-2
Replace the PCB
and retest
3-3 
Replace the DK14 or DK40i 
Base KSU. Or, test the DK424 
common control PCB per the 
Fault Isolation section. Initialize 
the DK424/DK40i system
(Prog: 91-9 and 03).
Are the  
faulty station(s) 
only in the DK40i 
Expansion KSU or only 
one DK424...

Fault Finding
Fault Isolation Flowcharts
Strata DK I&M 5/9912-13
Fault Finding
Flowchart 12-4 CO Line Dial Tone Faults
Is the
fault
cleared?
Go to
4-5
Call your technical
support group.NoNo
Yes
Yes
Retest.
Change the DK14 or DK40i Base KSU or test 
the DK424 common control PCB per the Fault 
Isolation section and initialize the system 
(Prog. 91-9 and 03).Is the
fault
cleared?Go to
4-5
4-7
No
No Are the 
faulty CO lines 
only in the DK40i 
Expansion KSU or one 
DK424 Cabinet?
4-10
4-5 Is the
fault...

Fault Finding
Fault Isolation Flowcharts
12-14Strata DK I&M 5/99
Flowchart 12-5 DSS Console Faults
START
DSS
console
type?
5-0
END DDSS
Go to
5-0
Is the correct
PCB slot code entered
in Program 03?Enter correct PCB slot
code using Program 03;
then turn power OFF
(for 5 seconds) and
then ON.
5-3
Refer to Chapter 8 and verify wiring:
Is the
fault
cleared?Yes
5-4
Go to
5-3
HDSS
No
On PEKU connected
to HDSS, set SW1
to the DSS position.
5-1 No
5-2
Is the
fault
cleared?•
•For DDSS, circuit 8 of the base
unit...

Fault Finding
Fault Isolation Flowcharts
Strata DK I&M 5/9912-15
Fault Finding
Flowchart 12-6 Voice Mail/(External) Auto Attendant Faults 
Is the
fault
cleared?Yes
END
START
This chart assumes
the VM/AA device
has no faults.
Is the
fault
cleared?Yes
6-3
No
6-2
Is VM/AA 
integration completely
non-operational?
END Yes
Read “Voice Mail Options” in Chapter 10 and 
the programming instructions for: 
DK14/DK40i: 03 (Code 92, slot 00 for 
K4RCU3) DK424: 03 (Code 92~94 for  RCTU 
PCB) DK14/DK40i/DK424: 15-0 and...

Fault Finding
Fault Isolation Flowcharts
12-16Strata DK I&M 5/99
Flowchart 12-7 Station Message Detail Recording (SMDR) Faults
START
No 
SMDR data or 
garbled data is 
detected at the QSMU, 
WSIU/TSIU/PIOU/PIOUS/
RSIU/RSIS SMDR port.
7-1
Is the
fault
cleared?Yes
7-5
No
This chart assumes
the SMDR device
has no faults.
No
END Yes
Read the SMDR 
installation 
instructions in this 
chapter before 
proceeding with this 
chart.
SMDR
data records are
sent correctly but not
when the customer
requires.
7-2Yes...

Fault Finding
Fault Isolation Flowcharts
Strata DK I&M 5/9912-17
Flowchart 12-8 Remote Maintenance Faults
START
Is Remote
Maintenance connection
via external modem on TTY
port or IMDU
modem?IMDU modem installed on
PIOU or PIOUS
8-1
END This chart assumes that the remote 
terminal and modem have no fault and that 
Remote Maintenance does not operate.
Is the
fault
cleared?
Call your technical 
support group.
If a digital or electronic telephone 
is in the Programming mode, it is 
not possible to enter the...

Fault Finding
Fault Isolation Flowcharts
12-18Strata DK I&M 5/99