Toshiba Strata Dk14, Dk40i, Dk424 Installation And Maintenance Manual

							DK424 T1
Flowchart Symbols
Strata DK I&M    5/996-21
DK424 T1
Table 6-2 RDTU T1 Error Record
Notes
lLatest DK424 Power On/Off Reset: Use this column to record whether the DK424 Power was 
reset On or Off, and the date and time that it was reset.
lUse the Synchro Bit Error, Bipolar Violation Error, Slip Error, and CRC Error columns to 
record the error number, and the date and time that they occur.
Flowchart Symbols
Five symbols are used in the flowcharts, 
which are identified in Figure 6-11.
Customer: _______________________________
DateTime
Latest Strata 
DK424 Power
Off/On Reset
Syncro Bit Error
Bipolar 
Violation Error
Slip ErrorCRC Error
Progression TO or FROM another 
flowchart location.  Letters and 
numbers denote the exact 
entrance or exit points.
Important notes affecting the 
fault clearing procedure. Marking points of a 
flowchart sequence.
Question to be answered 
YES or NO.
Statement of a required action.
1887
Figure 6-11 Flowchart Symbols 
						

							DK424 T1
Flowchart Symbols
6-22Strata DK I&M    5/99
Go to
1
1
1676
RDTU LED Indicators
Busy (on)
FALM (on)
MFALM (on)
YALM (on)
BALM (on) Top
LED
PSYNC (on or off)
SSYNC (on or off)
Busy (on)
No alarms; 
synchronization is
achieved
No alarms; 
synchronization is
achieved
MFALM (on)
(only)
YALM (on) Bottom
LED
The fault is not
classified, contact 
your technical 
support group.YesStart The
problem is: the RDTU
will not synchronize with the
far end
T1.Go to
chart 2
The
problem is: no
dial tone on CO
lines.NoYes
Yes
The
problem is: clicking
or popping sounds on the
talk path.No
The
problem is: no
dial tone on CO
lines.No
Yes
The
problem is: no
dial tone on CO
lines.No
YesRun DK424 programs per “RDTU
(T1)Applications.”
Note: Remember to cycle power
after Program 
*41-2.
Contract your technical
support group
Run DK424 programs per “RTDU (T1)
Applications.”   Note: MFALM (only) can
 indicate that RDTU is set for (SF)
and the far end T1 is (ESF), or vice versa, 
see Program 
*41-1.
This normally means that the far end
does not receive the RDTU signal,
but RDTU is receiving the far
end carrier signal.
Start Go to chart 2
The
problem is: volume levels
are too high or too
low.No
Yes
Run Program 
*41-3, 4
per “RTDU (T1)
Applications.” NoStart
Go to
chart 3Is the
problem
cleared
?Yes
NoEnd
Flowchart 6-1  Fault Classification 
						

							DK424 T1
Flowchart Symbols
Strata DK I&M    5/996-23
DK424 T1
Possible causes: No
carrier from far end; 
defective CSU, NIU, or 
RDTU; cable problems.
Is
fault cleared
?
Yes NoCheck RDTU/CSU/NIU
cabling per “RDTU Cable
Installation.”
Run DK system programs
per “RDTU (T1) System
Programming”.
Correct as necessary.
Perform RDTU self test
per “RDTU Loop Back Testing.” Before disconnecting CSU
from Telco line, notify the
T1 provider. You should also 
notify the provider before
connecting the CSU.
Did
RDTU pass the
self test
?NoReplace RDTU
and retest.
Yes 3
1Start
End
End Yes
Go to
4 Is
the problem
corrected
?
No Perform the CSU local loop back test. In this test the RDTU loop 
back jumpers remain off and the CSU is placed in the local loop 
back mode. (The RDTU transmit signal is looped back to its
receiver circuit.) See the CSU manufacturer’s I&M documentation.
Did the
CSU local loop back
test pass
?Go to
4 Recheck cables,
 then replace CSU. No 2 Perform the CSU network loop
back test per Figure 6-2.
Perform RDTU Network loop back
tests per Figures 6-10 and 6-11.Yes
Did CSU
network test pass but still no
synchronization
?Recheck cables,
then replace CSU. No
Go to
3 Is
the problem
corrected
?Yes
No 3Yes
Contact the T1 provider (carrier) and request them to perform a point-to-point,
on-site, test from the NIU (demarcation point) to the far end T1 equipment.
Was problem
corrected by network
personnel
?Yes
End 4 Contact your
technical support group.NoEnd
1677
Flowchart 6-2 No Synchronization 
						

							DK424 T1
Flowchart Symbols
6-24Strata DK I&M    5/99
No
1681
Is
there more
than one RDTU
installed
?No
Slip problems cause 
periodic clicking on the 
talk path. Clicks can occur 
many times (severe case) 
during a call or only a few 
times during a 24-hour 
period.
Slips occur when 
synchronization timing is 
lost for an instant and then 
recovers.
Monitor slips using 
“T1ERR” function in 
DK280 remote 
maintenance DUMP 
mode.
One example of a slip fault 
when using more than one 
RDTU T1 span is provided 
in Figure 6-6.• If RDTU spans are connected to a Telco
or...
   long distance provider, program the first 
RDTU as the primary reference and the 
second as a secondary reference using 
Program 
*42 (see Figure 6-7).
• If a third RDTU is connected to a PBX, 
the PBX should be set up as a slave to 
the RDTU.
• If all RDTUs are connected to a PBX, 
then either the RDTUs can be set as 
primary and secondary references 
(slaves) and the PBX as the master 
(Program 
*42 data is blank; or, all  
RDTUs should be set as the master and 
the PBX T1s should be slaves.
Program as required.• If RDTU is connected to a reliable 
clock source (Telco, AT&T etc.) 
then it should be programmed as a 
slave (primary reference) to the 
provider. (Program 
*42 – data = 1).
• If RDTU is connected to a PBX or 
channel bank, make sure that 
RDTU is programmed as the 
master clock provider (Program 
*42 
– data = blank); or, if the PBX is set 
up as a master, the RDTU should 
be programmed as a primary 
reference.
Program as required. Yes
1
Is slip
problem cleared
?
NoIs slip
problem cleared
?
NoYes 2 Start
End
Use Program 
*42 and assign a different RDTU as Primary reference. 
If problem continues try another RDTU as Primary reference.
Change the RDTU that was 
causing slip problems when it 
was set-up as Primary reference.Is slip
problem cleared
?
No Yes
Go to
3• Check all cable connections and 
correct as necessary.
• Change CSU.
• Change Primary reference RDTU.
• If problem continues after RDTU is 
changed, change RCTU.
• If problem continues after CSU, RDTU, 
and RCTU are changed, contact the T1 
provider and request a point-to-point 
slip test from NIU to far end T1.3
Is slip
problem cleared
?Yes Contact your 
technical support 
group.End
Flowchart 6-3 Synchronization Slip Problems 
						

							Strata DK I&M    5/997-1
DK40i/DK424 Universal 
Slot PCBs
DK40i/DK424
Universal Slot PCBs7
This chapter contains information on Printed Circuit Boards (PCBs) which can be used in the 
universal slots of either the Strata DK40i Expansion KSU or the Strata DK424 cabinets. Although 
the system architecture of these systems is very different, the PCBs described in this chapter are 
common to both systems.
Important!When installing these circuit boards in the DK40i Expansion KSU, you must install 
them in the universal slots designated in Chapter 2 – DK40i Configuration.
PCBs which are not installed in the universal slots of the system can be found in the installation 
chapter for the system. For example, the TCOU PCB for the DK40i system appears in Chapter 3 – 
DK40i Installation. Paragraph headings identify information which is specific to a particular 
system and minor exceptions are mentioned in text.
NotePrior to PCB installation, the power supply must be tested and the ground checked.
PCB Compatibility
The following is a list of PCBs that appear in this chapter:
PCB
Compatible 
with
DK40iCompatible 
with
DK424
Function
EOCU X XSpeaker Off-hook Call Announce Unit
(See PEKU for installation/programming instructions.)
IMDU X XRemote Maintenance Modem Unit
(See PIOU2, PIOUS2 for installation/programming 
instructions.)
KCDU X CO Line/Digital Telephone Interface Unit
PCOU1,2 X X (See RCOU for installation/programming instructions.)
PDKU2 X X Digital Telephone Interface Unit
PEKU X X Electronic Telephone Interface Unit
PEMU X X See REMU.
PEPU X X External Page Interface Unit
PESU X X Standard/Electronic Telephone Interface Unit 
						

							DK40i/DK424 Universal Slot PCBs
PCB Compatibility
7-2Strata DK I&M    5/99
PIOU2, 
PIOUS2X X Option Interface Units
PSTU X X (See RSTU2 for installation/programming instructions.)
RATU X Attendant Console Interface Unit
RCIS X X Adds four additional Caller ID lines to RCIU2.
RCIU1 X (See RCIU2 for installation/programming instructions.)
RCIU2 X X Caller ID Interface
RCMSAdds two ports per card (maximum of two) to E911 
CAMA Trunk Direct Interface card (RMCU)
RCOS X XAdds four loop start lines. (See RCOU for installation/
programming instructions.)
RCOU X X Four-Circuit Loop Start CO Line Interface Unit
RDDU X X Direct Inward Dialing Line Interface Unit
RDSU X X Digital/Standard Telephone Interface Unit
RDTU X T1 Interface Unit (See Chapter 6.)
REMU X X E&M Tie Line Unit
RGLU2 X X Loop/Ground Start CO Line Interface Unit
RMCU X CAMA E911 Trunk Direct Interface card
RMDS XOptional built-in modem. (See RSIU for installation/
programming instructions.)
RSIS XOptional RS-232 ports. (See RSIU for installation/
programming instructions.)
RSIU X RS-232/Modem Interface Unit
RSSU X X PC Interface Unit
RSTS X XOptional Standard Telephone Interface Subunit
(See RDSU for installation/programming instructions.)
RSTU2 X X Standard Telephone Interface Unit
RWIU X XStrata AirLink Wireless Interface Unit (see Chapter 16 – 
Strata AirLink Systems)
PCB
Compatible 
with
DK40iCompatible 
with
DK424
Function 
						

							DK40i/DK424 Universal Slot PCBs
PCB Chapter Layout
Strata DK I&M    5/997-3
DK40i/DK424 Universal 
Slot PCBsPCB Chapter Layout
Each PCB outline begins with the PCB’s designation and title (the outline appears in the chapter in 
alphabetical order by designation). A brief synopsis of the PCB appears next and includes a 
notation of the system(s) that the PCB can be used in, the circuits supplied by the PCB, what 
equipment the PCB interfaces with, and a list of the PCB’s older version(s) with a brief description 
of their differences.
Installation and programming instructions follow the synopsis with a table showing the PCB’s 
controls, indicators and connectors and an illustration of the board.
sample.pg
System:DK16e Expansion KSU, DK424Circuits per PCB:four DID linesInterfaces with: DID linesOlder Versions: None
RDDU
Direct Inward Dialing Line Interface Unit
RDDU Direct Inward Dialing LIne Interface UnitDK16e/DK424 Universal Slot PCBs
PCB Title
System:
Circuits per PCB:
Gives the type of system that is 
compatible with the given PCB.  Be 
sure to read this information before 
attempting to use a PCB with your 
system application.
Type and number of circuits 
available on the PCB.
Type of line/hardware the PCB can 
accept.
Interfaces with:
Describes older version or versions 
of the PCB. 
Older Version(s):
The RDDU provides four Direct Inward dialing (DID) lines, each of which can have a single 
office code along with a block of extensions. If an RDDU is installed, an RRCS must be 
installed for DTMF operation, but not for dial pulse operation.
Each extension can be assigned to ring a station [DN] that appears on one or multiple staitons, 
Distributed Hunt or ACD Group (DK424 only), or an external tlephone number selected in 
system programming. This enables calls over the same line to be routed to difernent staions or 
group of stations. An extension can alos be assinged to ring the maintenance modem. Each 
RDDU can be set for either wink start or immediate. All RDDU lines support DNIS and ANI 
features. 
RDDU controls, indicator,s and interface connectors are shown in Figure 7-10 and described 
in Table 7-8.
RDDU Hardware OptionTher e are no hardware options supported by the RDDU. 
						

							DK40i/DK424 Universal Slot PCBs
PCB Chapter Layout
7-4Strata DK I&M    5/99
KCDU
CO Line/Digital Telephone Interface Unit
System:DK40i Expansion KSU
Circuits per PCB:two CO loop start/four digital telephone circuits
Interfaces with:central office loop start lines
digital telephones (with or w/o RPCI-DI or ADM)
PDIU-DS
DDCB
cordless digital telephone (DKT2004-CT)
Older Version(s):none
One or two KCDU PCBs may be installed in the Expansion KSU. For controls, connectors, and 
indicators, see Figure 7-1 and Table 7-1.
KCDU Configuration
The KCDU may have to be configured to control excessive loudness if the system is close to a CO 
or installed behind a PBX telephone system. It does not have to be configured for anything else. 
The decibel (dB) PAD switches, SW501 (CO1) and SW601 (CO2), control the loudness by 
providing a 3 dB signal level drop to, or from, the PBX or CO when set to the PAD position. The 
switch comes from the factory set at NOR (for normal) meaning no PAD loss.
KCDU Installation
1. If the system is located within one mile of the CO or PBX telephone system, set dB PAD 
switches SW501 and SW601 to the PAD position.
2.Insert the KCDU into the appropriate slot in the Expansion KSU, per tables in Chapter 2 – 
DK40i Configuration. Apply firm, even pressure to ensure proper mating of the connectors.
3. After installing the KCDU, gently pull the PCB outward. If the connectors are properly mated, 
a slight resistance will be felt.
NoteIf KCDU CO lines receive Caller ID, RCIU2 must be installed.
KCDU Programming
See “RCOU Programming” on Page 7-29 and “PDKU2 Programming” on Page 7-6 for KCDU 
programming information. When running Program 03 for the KCDU slot(s), specify code 65 if the 
KCDU does not support OCA or PDIU-DI telephones or code 66 if the KCDU supports OCA or 
PDIU-DI telephones. Do not specify code 11, 61, 62, or 64. 
						

							DK40i/DK424 Universal Slot PCBs
PCB Chapter Layout
Strata DK I&M    5/997-5
DK40i/DK424 Universal 
Slot PCBs
Table 7-1 KCDU Controls, Indicators, and Connectors
Control/Indicator/ConnectorType of ComponentDescription
CO line circuit 1
indicator SW501Red LED
Lights to indicate CO line circuit is in operation.
CO line circuit 2
indicator SW601Red LED
J7 connectors Modular connector Interface connector for CO line circuits,1 and 2.
PAD switch SW501 Two-position slideEnables 3 dB signal level drop for CO line 
circuit 1 (when set in PAD position).
PAD switch SW601 Two-position slideEnables 3 dB signal level drop for CO line 
circuit 2 (when set in PAD position).
Backplane Connector 25-Pair Amphenol Connector (Female)
CO2
CO1
SW501
(CO1) SW601
(CO2)
PAD  NORPAD  NOR
J7
1857
Figure 7-1 KCDU PCB 
						

							DK40i/DK424 Universal Slot PCBs
PDKU2 Digital Telephone Interface Unit
7-6Strata DK I&M    5/99
PDKU2
Digital Telephone Interface Unit
System:DK40i Expansion KSU, DK424
Circuits per PCB:eight digital telephone circuits
Interfaces with:digital telephones (with or w/o RPCI-DI or ADM)
DDSS console (circuit 8 only)
PDIU-DS (must have dedicated circuit)
DDCB (circuit 5 only–ports 004, 012, 020, and 028)
cordless digital telephone (DKT2004-CT)
DKT2001 single line digital telephones (see Note below)
Older Version(s):PDKU1 (identical to PDKU2 except it does not support continuous DTMF tones
w/DKT2000-series telephones, DIUs can only be connected to circuits 1~7)
PDKU2 Hardware Options
PDKU2 does not have to be configured for any option. Refer to Chapter 9 – Station Apparatus for 
instructions on how to connect digital telephones, DDCBs, and DDSS consoles to the PDKU2, as 
well as how to upgrade digital telephones with these options: an Integrated Data Interface Unit 
(PDIU-DI, RPCI-DI), a Speaker Off-hook Call Announce upgrade (DVSU), and a Headset/Loud 
Ringing Bell Interface (HHEU). Refer to Chapter 10 – Peripheral Installation to connect the Stand-
alone Data Interface Unit (PDIU-DS) to the PDKU.
NoteDKT2001 telephones do not support HHEUs, DADMs, DDSSs, RPCI-DIs, or DVSUs.
There are no controls or indicators on the PDKU (Figure 7-2).
PDKU2 Installation
1. Insert the PDKU2 (component side facing right) into the appropriate slot, and apply firm, even 
pressure to ensure proper mating of connectors. (For DK40i, PDKU2 must be installed per 
tables in Chapter 2 – DK40i Configuration.)
2. After installing the PDKU, gently pull the PCB outward. If the connectors are properly mated, 
a slight resistance is felt.
PDKU2 Programming
Program 03
©Specify Code 61 to indicate a station line PDKU2.
©Specify Code 62 to indicate a PDKU2 supporting Speaker Off-hook Call Announce (OCA) 
and/or DIUs and RPCI-DI Data mode.
©Specify Code 64 to indicate a PDKU2 supporting a DDSS console, Speaker OCA, DIUs, and 
RPCI-DI Data mode.
©For RPCI-DI TAPI mode only and Handset OCA, code 61 can be used and the PDKU2 can be 
in any universal cabinet slot.
NoteIf there are no PDKU2 options, Program 03 can be skipped, and Program 91-1 or 91-9 can 
be run instead.
Programs 20, 21, and 22: Configures DIUs and RPCIs.