Toshiba Strata Dk14, Dk40i, Dk424 Installation And Maintenance Manual

							ISDN Interfaces
RPTU Interface Unit
Strata DK I&M 5/9914-5
ISDN Interfaces
Table 14-3   DK424 Base Cabinet with RCTUE3/F4 with MBJU Removed
RPTU Installation
Before installing a RPTU PCB into a DK424, a number of system programs should be run. This 
enables the RPTU to function immediately upon insertion. It is recommended that you run these 
programs in the order listed in the DK Programming Manual (refer to the ISDN section) before 
beginning installation.
ä
To install an RPTU PCB
1. Set the jumper wire plugs JP1 and JP2 (LB) to the OFF position.
2. Turn the DK424 system power OFF.
3.Insert the RPTU (component side facing right) into the appropriate slot (see “Slot 
Assignments” on “Slot Assignments” on Page 14-4) and apply firm, even pressure to ensure 
proper seating of connectors.
4. After installing the RPTU, gently pull the PCB outward. If the connectors are properly seated, 
a slight resistance is felt.
NoteFor cabling information and requirements, refer to “Cabling” on Page 14-8.
Cabinet RPTU1/Vacant Slots2No.Ty p e
1 DK424 (base) 13
1/142151/162
2DK280 21
1/222231/242251/262
DK424 211/222231/242
3DK280 31
1/322
DK424 311/322371/382
4DK280 41
1/422
DK424 411/422471/482
5DK280 51
1/522
DK424 511/522571/582
6DK280 61
1/622
DK424 611/622671/682
7DK280 Does not have a seventh cabinet.
DK424 None
1. Allowed RPTU slots.
2. Slots must be vacant. 
						

							ISDN Interfaces
RPTU Interface Unit
14-6Strata DK I&M 5/99
Figure 14-2 RPTU PCB
Table 14-4 RPTU Switches, Jumpers, and Connectors 
Switches/Jumpers/ConnectorDescription
SW1 (Line length adjustment switch) Matches the RPTU impedance to the impedance of the 
line (length between the CSU and the RPTU). Refer to 
Table 14-6 on Page 14-8.
SW2 (Reset switch)
1
1. If this switch on the Primary Clock source RPTU is pressed (Program *42-1), the clock source will automatically 
revert to the Secondary Clock source PCB (Program *42-2).Resets or initializes the RPTU firmware. Press this switch 
to correct an out-of-service condition, or just prior to 
connecting to the Network PRI.
JP1 & JP2 (Loop-back jumpers) Makes loop-back tests of the cabling between the ISDN 
Network switch, CSU, and RPTU.
J1 8-pin Modular Connector (RJ-45) Connects the RPTU to the CSU/network PRI ISDN line.
J2 6-pin Modular Connector (RJ-11) Connects the RPTU to a terminal or PC to monitor 
D-channel data.
Backplane Connector
2543
RS-232C
RESET
CD2 CD1FSYC
AIS
RAB
LOS
RST
BSU
TS
RPTU1
RPTU1A V .1
ISDN (PRI)
JP1
JP2
12345678OFF MCC
RPTU1A
(front)
SW2
J2
LEDs
SW1
J1
JP1 & JP2 
						

							ISDN Interfaces
RPTU Interface Unit
Strata DK I&M 5/9914-7
ISDN Interfaces
Figure 14-3 RPTU LEDs and Connectors
Table 14-5 LED Functions
LEDFunctions
FSYCFrame Synchronization
ON: Frame alignment is lost.
OFF: Frame alignment is working properly.
AISAlarm Indication Signal
ON: Receiving an alarm from the CO.
OFF: Circuit is working properly.
RABRemote Alarm
ON: Receiving a remote alarm from the CO.
OFF: Circuit is working properly.
LOSLoss of Signal
ON: IC signal cannot be detected.
OFF: Circuit is working properly.
RSTReset
ON: CPU is resetting the software.
OFF: Circuit is working properly.
BSYBusy
ON: One or more B-channels are busy.
OFF: All B-channels are idle.
TSTiming Signal
ON: Circuit is secondary timing source.
OFF: Circuit is not used for system timing.
Flashing:Circuit is primary timing source.
Reset Switch
(resets the software)
RS-232C Connector
for Call-Data Monitor (RJ-12)
LEDs
RJ-45 8-pin 
(shielded)
Modular Connector (to CSU) Not Used
FSYC
AIS
RAB
LOS
RST
BSY
TS
2747 
						

							ISDN Interfaces
RPTU Interface Unit
14-8Strata DK I&M 5/99
Cabling
To meet Part 15 of FCC Rules, ISDN PRI equipment must be connected using CAT5, Shielded 
Twisted-Pair (STP) cabling between the CSU and the RPTU. CAT5 STP protects against cross 
talk, Radio Frequency Interference (RFI), and/or Electro Magnetic Interference (EMI). STP 
protects ISDN signal data while being transmitted through the cable and keeps the cable itself from 
emitting EMI and RFI.
Important!To avoid ground loops, connect only the RPTU end of the shielded cable to ground. 
The DK grounds the CAT5 cable shield between the DK and CSU at the RPTU RJ-
45 jack. You do not have to connect the CSU ground drain. The CSU ground should 
not be connected to the cable shield.
Shield continuity must be maintained from the RPTU to the CSU, particularly if using extension 
connecting cables. Keep the cable as short as possible between the CSU and the PRI Demarcation 
jack, because there is no shield between the CSU and the Demarcation jack.
Toshiba provides a cable kit (Part No. RPRI-CBL-KIT), that contains all that you need to connect 
the network ISDN jack to the network side of most CSUs and the equipment side of the CSU to the 
RPTU PCB. Depending on the manufacturer, the CSU may use DB15 or modular jacks. If the CSU 
is equipped with the modular jacks, the DB15/modular adapters are not used. If this is the case, 
make sure the CSU modular jacks are not shielded jacks. Refer to Figure 14-3 for more 
information.
A detailed pinout diagram for the RJ-45 jacks (USOC RJ-48C or RJ-48X) and the modular cords/
adaptors is shown in Figure 14-2 on Page 14-6.
Cable Length
The distance between the RPTU and CSU or RPTU and other Customer Premise Equipment (CPE) 
may vary (0~655 ft.). The RPTU must be equalized and its impedance must match the impedance 
of the connecting cable. Set SW1 on the RPTU for the proper cable length as shown in Table 14-6. 
Refer to Figure 14-2 for switch locations.
Table 14-6 SW1 Settings 
SW1Short
(0 - 150 ft.)Medium
(150 - 450 ft.)Long
(450 - 655 ft.)
1ON OFF OFF
2 OFF ON OFF
3OFF OFF ON
4 OFF ON OFF
5OFF OFF ON
6 OFF ON OFF
7OFF OFF ON
8 Not Used Not Used Not Used 
						

							ISDN Interfaces
RPTU Interface Unit
Strata DK I&M 5/9914-9
ISDN Interfaces
Cable Installation
The RPTU PCB is shipped with a Toshiba RPRI cable kit for connection of the RPTU to a CSU. 
Install the kit as shown in Figure 14-3.
 
 
Figure 14-4 Detailed Pinouts for ISDN PRI Cabling
Network Jack/RPTU Modular Jack
PinFunction
1Tip – Receives from the network (NT – TE)
2 Ring – Receives from the network (NT – TE)
3 Not Used
4 Ring – Transmits to the network (TE – NT)
5 Tip – Transmits to the network (TE – NT)
6 Not Used
7 Not Used
8 Not Used
ISDN PRI
Network
JackCSU
DB15
(female)DB15
(male)RPTU
2752
A
B
CD
E
RJ-45
ItemDescription
A1
1. Cable A and D are straight-pinned data cables, not cross-pinned 
telephony cables.
Fifteen feet of CAT5 unshielded cable
B One DB15 modular adapter (CSU to network jack)
C One DB15 modular adapter (CSU to RPTU)
D1Thirty feet of CAT5 shielded cable
E One Ferrite core
C
S
U
1
2
3
4
5
6
7
81
2
3
4
5
6
7
81
2
3
4
5
6
7
81
2
3
4
5
6
7
8
CSU Local Power
Adapter
Network
Interface
Jack
RJ48-C
or
RJ48-X
(8-pin
Modular)1-T1
2-R1
3-
4-R
5-T
6-
7-Nu
8-Nu1-T1
2-R1
3-
4-R
5-T
6-
7-Nu
8-NuRPTU8-pin
Modular
Jack 1
2
3
4
5
6
7
8
3
11
9
11
2
3
4
5
6
7
83
11
9
1 3-T1
11-R1
3-
9-R
1-T3-T1
11-R1
3-
9-R
1-T
CSU
DB15
MaleCSU
DB15
Female
Toshiba-supplied 8-wire modular
cord, straight-through pinning
(15 ft. CAT5, unshielded)
Toshiba-supplied 8-pin modular
cord to DB15 female adapterDealer-supplied CSU
Toshiba-supplied 8-pin modular
to DB15 male adapter Toshiba-supplied 8-wire
modular cord, straight-through
pinning (30 ft. CAT5, shielded) Toshiba-supplied Ferrite core
2753
Notes
lThe modular pins are numbered left to right when looking into 
the jack cavity with the locking clip down.
lShield continuity must be maintained between the RPTU and 
the CSU, particularly on extension cords. Since there is no 
shield continuity across the CSU and network jack, the cable 
should be kept as short as possible. 
						

							ISDN Interfaces
RPTU Interface Unit
14-10Strata DK I&M 5/99
Ferrite Core
Install the Ferrite core provided with the RPRI cable kit as shown in Figure 14-5. This core is 
needed to comply with FCC requirements.
Figure 14-5 Ferrite Core Installation
RPTU Testing and Troubleshooting
Loop-back Testing
The RPTU has loop-back test jumpers that enable physical connections (cables/jacks/plugs) 
between the RPTU, CSU, and the network PRI line to be tested (see Figure 14-6). The tests check 
that the CSU receives and transmits the PRI signal properly in both directions. The test signals, 
generated by the Network PRI provider, pass through the CSU and loop around the RPTU. The 
RPTU sends the received test signal back through the CSU to the Network and the Network 
detector checks for a valid signal.
äTo perform the loop-back test
1. Remove the PRI modular cord from the RPTU RJ-45 jack and remove the RPTU from its card 
slot.
2. Place the JP1 and JP2 jumpers to the LB-ON position. Install the RPTU with the DK power 
OFF and the PRI modular disconnected from the RPTU RJ-45 jack. 
Ferrite Core
ZCAT3035-1330
One Turn
CAT5 Shielded Cable
RPTU
Side View
2754
Tie Wrap
Note: The Ferrite core must be
as close as possible to the RPTU.
ISDN PRI Jack 
						

							ISDN Interfaces
Timing and Synchronization
Strata DK I&M 5/9914-11
ISDN Interfaces
3. Turn the DK power ON and connect the PRI modular cord to RPTU RJ-45. 
4. After the PRI line and RPTU are synchronized, have the CO generate the loop-back test sign 
(all “1s” or “0s”). 
CAUTION!Do not have the CO do a QRS loop-back test, because the test signal may cause 
the DK to drop all calls and/or stop operating.
5. If the loop-back test fails, perform tests to isolate the problem with an ISDN test set, such as 
the Sunbird, ISDN, or Trend DUET. In this case, the network PRI line is disconnected and the 
test set is connected to the CSU network input jack. For testing details, refer to the ISDN test 
set operating procedures.
Figure 14-6 Loop-back Test
Timing and Synchronization
The Digital Network is connected by timing clocks that synchronize the network and have various 
degrees of precision (stratum levels). There are four stratum levels – 1 is the highest and 4 is the 
lowest. They are associated with the following sources:
©St ra t u m  –  1: Public Telephone Network clock
©St ra t u m  –  2: #4 ESS Toll Switches
©St ra t u m  –  3: #5 ESS Central Offices
©St ra t u m  –  4: Digital PBXs
In the DK424, one PRI, BRI, or T1 PCB can be programmed to extract the Stratum clock signal. It 
uses the signal as the DK system Primary clock reference. The clock provider should be a reliable 
source, such as a Telco or common carrier (AT&T). All other PRI, BRI, or T1 lines connected to 
the DK424 will be synchronized to the same clock provider. If the PRI, BRI, or T1 are not 
synchronized to the same clock provider, the DK424 could experience “slip” problems.
Timing reference assignments for PRI, BRI, and T1 are made with the Program *42 series. The 
timing or synchronization program determines how the DK424 digital voice or data transmission 
path is synchronized with the far-end digital path. For proper PRI, BRI, and T1 operation, the 
equipment at each end of the line must be synchronized.
CO ISDN
PRI Test
SignalISDN PRICSUISDN PRI
(RJ-45)JP1(LB-ON)
JP2(LB-ON)
1.5MHz
line
Interface
LSI
Demarcation Point
2756
RPTU
Network
Jack
RJ-48C
or RJ-48X 
						

							ISDN Interfaces
Timing and Synchronization
14-12Strata DK I&M 5/99
The RCTU time switch is synchronized as the slave to the PRI, BRI, or T1 line (Line 1 in Figure 
14-7). The DK424 PRI, BRI, or T1 in any slot number can be assigned as the Primary reference 
(Program *42-1, DATA=1 for this PRI, BRI, or T1).
If a malfunction occurs and Primary reference synchronization is lost, the DK424 automatically 
switches modes and synchronizes to the Secondary reference, provided that there is another PRI, 
BRI, or T1 installed in the DK424. The Secondary reference PCB is assigned in Program *42-2.
Figure 14-7 Primary and Secondary References
Figure 14-7 shows the Primary reference PCB. The clock signal from Line 1 passes through 
the PCB Software Switch (SS
1) and the synchronization circuit of the RCTU PCB. The RCTU 
clock passes the clock source through the time switch and synchronizes the DK424 digital 
transmission voice or data path. 
2757
PDKUPrimary Reference PCB*
Secondary Reference PCB*
Other RDTU, RPTU, or RBSU
DK424 Digital Transmission Voice Path
Synchronization
Circuit
Synchronization
Circuit
Synchronization
Circuit Digital Voice
Path
Digital Voice
Path
Digital Voice
Path DK424
Digital
Telephone
Electronic
Telephone
Standard
TelephoneSS
1
SS
2
SS
3
Line 1
Line 2
Line 3Public Switched
Telephone
Network (PSTN)
PRI, BRI, or T1
AT&T or
other provider
PRI, BRI, or T1
Other
PRI, BRI, or T1
providerStratum-1
Clock
Source RCTU PCB
Clock not synchronized properly
with Stratum-1 Clock Source
Time
SwitchClock
Synchronization
Circuit
Prg *42-1-1
Prg *41-1[blank]Prg *42-2-2
Prg *42-1[blank]
Clock synchronized properly
with Stratum-1 Clock Source
Other
Clock
Source
RSTU
PEKU
* Primary/Secondary reference PCBs
  are assigned in Program *42-1/*42-2
  and can be an RDTU, RPTU,
  RBSU, or RBUU. 
						

							ISDN Interfaces
RPTU Call Monitoring (PRI)
Strata DK I&M 5/9914-13
ISDN Interfaces
The Secondary reference is activated if the Primary reference fails. The DK424 automatically 
switches over to the Secondary reference PCB by opening its synchronization circuit (SS
1) and 
closing the synchronization circuit (SS
2). When this occurs, the digital voice or data path of 
the DK424 is synchronized to the Line 2 clock source.
If the path is not synchronized to the Stratum – 1 clock source, calls connected through that 
path experience “slipping” or “jitter” in the digital voice or data path (channels). Figure 14-7 
shows an unsynchronized signal from Line 3. The unsynchronized signal produces a clicking 
or popping sound that is heard by the people connected through this path or causes data errors 
on data transmissions.
RPTU Call Monitoring (PRI)
The RPTU provides an RS-232 monitor function that enables you to monitor the ISDN PRI 
D-channel call progress layer two and three messages (setup, connect, and release). This data can 
be monitored live, saved to a file, and/or printed using a PC with communication software.
The hardware connections and communication parameters for the RPTU monitor port are shown in 
Figure 14-8. Once this connection is setup and established, call monitoring data continues to be 
sent (on the fly) as PRI calls are originated or received.
Two sample printouts from the RPTU monitor are provided. Figure 14-9 shows typical ISDN PRI 
start-up and synchronization sequences that occur at connection and power on. Figure 14-10 
shows typical ISDN PRI outgoing call setup and release sequences.
The communication parameters for all call-monitor jacks are 9600 bps, 7, 1, even.
NoteThe RPTU, RBSU, and RBUU ISDN interface PCBs each have a call-monitor jack. The 
pin numbering and communication parameters are the same for each call-monitor jack. 
The call-monitor jack on each PCB provides data only for the circuits of the PCB on 
which it appears.
Figure 14-8 Call-monitor Jack for the RPTU, RBSU, and RBUU
RD
TD
DSR
DTR
DCD
SG1
2
3
4
5
6
Call-monitor jack (RJ-12)
pin numbering Dealer-supplied 6-wire
telephone modular cord
(cross-pinned) Call-monitor jackPC with communication
software - such as ProComm™
PC DB9 or
DB25 Com port
Toshiba PPTC9 or
PPTC25F
RPTU/RBSU/RBBU
2755 
						

							ISDN Interfaces
RPTU Call Monitoring (PRI)
14-14Strata DK I&M 5/99
Figure 14-9 Start-up and Synchronization Sequences
/*-------------------------*/
  Copyright(C) 1997
  TOSHIBA Corporation
  All rights reserved
  RPTU Ver.1G
  [Reset]
/*-------------------------*/
00;00 016 Act.       (F1)
/*-------------------------*/
  Copyright(C) 1997
  TOSHIBA Corporation
  All rights reserved
  RPTU Ver.1G
  [Reset]
/*-------------------------*/
00;00 016 Act.       (F1)
00;09 634 LOS        (F3)
00;12 109 Act.       (F1)
/*-------------------------*/
  Copyright(C) 1997
  TOSHIBA Corporation
  All rights reserved
  RPTU Ver.1G
  [Reset]
/*-------------------------*/
00;00 017 Act.       (F1)
00;06 619 Tx :[SAPI]00 C [TEI]000 [FRAME]SABME P 
00;06 630  Rx:[SAPI]00 R [TEI]000 [FRAME]UA    F 
00;07 236  Rx:[SAPI]00 C [TEI]000 [FRAME]SABME P 
00;07 245 Tx :[SAPI]00 R [TEI]000 [FRAME]UA    F 
00;11 754 LOS        (F3)
00;14 228 Act.       (F1)
00;14 415 Tx :[SAPI]00 C [TEI]000 [FRAME]SABME P 
00;14 427  Rx:[SAPI]00 R [TEI]000 [FRAME]UA    F 
00;14 753 Tx :[SAPI]00 C [TEI]000 [FRAME]SABME P 
00;14 765  Rx:[SAPI]00 R [TEI]000 [FRAME]UA    F 
00;24 275 Tx :[SAPI]00 C [TEI]000 [FRAME]INFO    [N(S)]000 [N(R)]000 
              PD = Q.931(08)
              CR = 02 0002
              MT = SETUP(05)
              04 03 80 90 A2 18 03 A9 83 97 70 08 C1 35 38 33  ..........p..583
              33 30 30 31                                      3001
00;24 292  Rx:[SAPI]00 R [TEI]000 [FRAME]RR      [N(R)]001 
00;28 315 Tx :[SAPI]00 C [TEI]000 [FRAME]INFO    [N(S)]001 [N(R)]000 
              PD = Q.931(08)
              CR = 02 0002
              MT = SETUP(05)
              04 03 80 90 A2 18 03 A9 83 97 70 08 C1 35 38 33  ..........p..583
              33 30 30 31                                      3001
00;28 333  Rx:[SAPI]00 R [TEI]000 [FRAME]RR      [N(R)]002 
00;43 812  Rx:[SAPI]00 C [TEI]000 [FRAME]INFO    [N(S)]000 [N(R)]002 
              PD = Q.931(08)
              CR = 02 8002
              MT = CONN(07)          
2759