ADTRAN Network Card DSU CSU User Manual

Section 61291006L2-5  
Issue 2, June 1999  
CLEI Code #D4D3MPY_ _ _  
Model TROCU DP Preferred Option  
®
Total Reach All-Rate DDS Dataport  
Installation and Maintenance  
CONTENTS  
1. GENERAL..................................................................... 1  
2. OPTIONS ...................................................................... 2  
3. INSTALLATION ........................................................... 3  
4. TESTING....................................................................... 3  
5. REMOTE PROVISIONING AND  
SW1  
OCU DP  
TR  
1291006L2  
SD4 2-WIRE  
SC  
64  
56  
19.2  
9.6  
4.8  
2.4  
SW56  
SYNC  
LOSS  
NEAR  
CRC  
FAR  
CRC  
DIAGNOSTICS............................................................. 4  
6. DEPLOYMENT GUIDELINES.................................... 5  
7. WARRANTYAND CUSTOMER SERVICE ............... 6  
REM  
QM  
DISC  
AP  
NO  
DSU  
LBK  
IDLE  
L
O
G
I
Rx  
(OUT)  
C
Tx  
(IN)  
FIGURES  
Figure 1. TROCU DP Preferred Option ............................. 1  
Figure 2. Total Reach DDS Circuit Diagram ..................... 1  
Figure 3. Option Switch ..................................................... 2  
Figure 4. Rate Selection ..................................................... 2  
Figure 5. OCU Loopback at the TROCU DP ..................... 4  
Figure 6. TROCU DP Bidirectional Loopback  
Figure 1. TROCU DP Preferred Option  
Pass-Thru Mode ................................................. 4  
Figure 7. TROCU DP Bidirectional Loopback  
traditional four-wire Alternate Mark Inversion (AMI)  
signal for presentation to the customer.  
Normal Mode ..................................................... 4  
The TROCU DP occupies a single channel position in  
the WECO® compatible D4 channel bank or the  
AT&T® SLC-96 Mode I and III terminal. It provides  
the interface between a DS0 timeslot of the T-carrier  
data stream, and the two-wire metallic loop extending  
to the customer premises.  
TABLES  
Table 1. Preprovisioning ..................................................... 3  
Table 2. Cable Type Loss Data @ 13.3 kHz....................... 3  
Table 3. LED Indicators ..................................................... 5  
Table 4. TRDDS Insertion Loss Measurements ................. 5  
1. GENERAL  
The TROCU DP may interoperate over the carrier  
system with another TROCU DP, an OCU DP, a DS0  
DP, a 1/0 DCS, or the central office switch. The unit  
can be located in an end office, hub office,  
intermediate office, or remote terminal digital carrier  
system (see Figure 2). The two-wire loop is  
connected using the tip (pin 24) and ring (pin 51) on  
the D4 backplane.  
This practice provides installation and maintenance  
procedures for the ADTRAN D4 Total Reach Office  
Channel Unit Dataport (TROCU DP) Preferred  
Option. The unit is illustrated in Figure 1.  
Document Revision History  
Issue 2 of this document revises the Deployment  
Guidelines subsection.  
Description  
ADTRAN D4 TROCU DP Preferred Option is a  
functional replacement for the D4 OCU DP,  
delivering data at rates up to 64 kbps on a single  
copper pair. Used in combination with the Total  
Reach Digital Data Service Remote termination unit  
(TRDDS-R), the TROCU DP can accommodate  
extended loop lengths eliminating the need for DDS  
repeaters. The TROCU DP span powers the remote  
TRDDS-R located at the customer premise. The  
TRDDS-R converts the two-wire signal to the  
D4 or SLC-96  
Customer Premises  
4-Wire Customer  
Interface  
2-Wire Loop  
T/R Pair  
TR  
OCU  
DP  
T-Carrier  
TRDDS-R  
DSU/CSU  
Figure 2. Total Reach DDS Circuit Diagram  
Trademarks: Any brand names and product names included in this document are  
trademarks, registered trademarks, or trade names of their respective holders.  
61291006L2-5B  
1
 
In lieu of option switches, the TROCU DP Preferred  
Option has been preprovisioned with feature settings  
as indicated in Table 1.  
When inserted into a powered up backplane the  
TROCU DP and TRDDS-R will synchronize within 30  
to 90 seconds. When synchronized, the SYNC LOSS  
indicator LED will turn Off. If synchronization cannot  
be achieved, check the T/R pair for an open circuit or  
short circuit condition, or load coils (see LED  
Indicators).  
Table 1. Preprovisioning  
Feature  
Setting  
Latching Loopback  
ON  
4. TESTING  
Testing for the TROCU DP is accomplished using the  
same test procedures for four-wire OCU and OCU DP  
units. Table 2 describes cable loss for the TRDDS  
Nyquist frequency of 13.3 kHz.  
ON (Unless 56 kbps, SC, and  
64 kbps = OFF)  
Zero Code Suppression  
Error Correction  
OFF  
The TROCU DP is equipped with logic level bantam  
test access jacks that permit testing in both directions  
using a portable test set. Latching and alternating OCU  
and CSU loopback sequences are supported.  
Alternating loopbacks do not operate when the 64  
kbps data rate is selected. Choose NEAR to test  
toward the customer loop; choose FAR to test toward  
the T-carrier.  
3. INSTALLATION  
C A U T I O N !  
SUBJECT TO ELECTROSTATIC DAMAGE  
OR DECREASE IN RELIABILITY.  
HANDLING PRECAUTIONS REQUIRED.  
The TROCU DP plugs directly into a WECO or  
equivalent D4 channel bank or the ADTRAN ACT  
1900/2300 channel bank. No special wiring is  
required. The two-wire loop uses the T/R (Tip and  
Ring) pair, pins 24 and 51 of the D4 backplane.  
In the FAR direction, an OCU loopback sequence will  
loop the unit directly across the T-carrier system. In  
the NEAR direction, an OCU loopback sequence will  
loop the unit directly connected to the portable test set.  
Span-powering is accomplished using -130 V,  
measured from Tip to Ring. Voltage measured from  
Tip to GND should indicate approximately -130 V;  
voltage from Ring to GND should indicate  
approximately 0.0 V.  
NOTE  
If64kbpsisselected,theunitwillonlyrespond  
to latching loopback sequences. Alternating  
sequences are not valid at this rate.  
Table 2. Cable Type Loss Data @ 13.3 kHz  
Plastic Cable  
dB Loss/kft  
0.5302  
Paper Cable  
19 Gauge PULP (0F)  
19 Gauge PULP (70F)  
19 Gauge PULP (120F)  
dB Loss/kft  
19 Gauge PIC (0F)  
19 Gauge PIC (70F)  
19 Gauge PIC (120F)  
0.5616  
0.6415  
0.6955  
0.6083  
0.6610  
22 Gauge PIC (0F)  
22 Gauge PIC (70F)  
22 Gauge PIC (120F)  
0.912  
1.0258  
1.1015  
22 Gauge PULP (0F)  
22 Gauge PULP (70F)  
22 Gauge PULP (120F)  
0.9454  
1.0606  
1.1370  
24 Gauge PIC (0F)  
24 Gauge PIC (70F)  
24 Gauge PIC (120F)  
1.2571  
1.3982  
1.4917  
24 Gauge PULP (0F)  
24 Gauge PULP (70F)  
24 Gauge PULP (120F)  
1.2900  
1.4324  
1.5268  
26 Gauge PIC (0F)  
26 Gauge PIC (70F)  
26 Gauge PIC (120F)  
1.6823  
1.8568  
1.9718  
26 Gauge PULP (0F)  
26 Gauge PULP (70F)  
26 Gauge PULP (120F)  
1.6751  
1.8469  
1.9608  
61291006L2-5B  
Section 61291006L2, Issue 2  
3
 
As an enhancement to automated testing capability,  
TRDDS eliminates false error indication when  
invoking NIE, CSU, or DSU loopbacks immediately  
following release of OCU loopback.  
TROCU DP  
TRDDS-R  
X
X
DSU/CSU  
Open Loop  
TROCU DP Bidirectional Loopback Support  
The TROCU DP will execute a bidirectional loopback  
when performing an OCU loopback at the TROCU  
DP as shown in Figure 5. If the TRDDS-R detects a  
bidirectional loopback during power-up  
Bidirectional  
loopback  
Figure 7. TROCU DP Bidirectional Loopback  
Normal Mode  
synchronization, the TRDDS-R allows data to pass on  
the four-wire interface by entering into the pass-thru  
mode. This allows a standard portable DDS test set,  
connected to the four-wire customer interface of the  
TRDDS-R, to verify the integrity of the two-wire loop  
by transmitting a test pattern and examining the  
returning data for synchronization and errors. The  
TROCU DP LBK LED will illuminate solid during an  
OCU loopback. Refer to Figure 6 for an illustration  
of the bidirectional loopback pass-thru mode.  
5. REMOTE PROVISIONING AND  
DIAGNOSTICS  
Control Protocol  
Remote access to provisioning and status information  
is accomplished using ADTRAN Digital System 6  
Message protocol, defined in Control and Diagnostic  
Procedures Practice, Section 6032991-6. Digital  
System 6 is supported by the TPI 108/109 and 105  
portable test set and is supported by Hekimian React  
2001 Release 1.900 remote test system. The TRDDS  
network elements comply with ANSI T1.107-1995,  
“Digital Hierarchy Format Specifications Annex G”  
which allows remote provisioning, querying, and  
performance monitoring via inband control of network  
elements.  
TROCU DP  
Intra-office  
Customer  
Bidirectional  
loopback  
NOTE  
TheREACT2001GUIsoftwareRelease1.900  
supports ANSI T1.107-1995.  
Figure 5. OCU Loopback at the TROCU DP  
TROCU DP  
Remote access is accomplished using a defined set of  
inband DS0 byte sequences similar to the latching  
loopback sequence. Commands issued through the test  
system are recognized by the individual channel unit,  
which responds with the appropriate byte sequences.  
These inband commands may be used to verify  
options via dialogs with REACT 2001 and  
TPI 108/109 test sets. Unit CLEI, serial number,  
provisioning, and performance information can be  
retrieved remotely using the Digital System 6  
protocol.  
TRDDS-R  
Test Unit  
Data  
Pass-Thru  
Bidirectional  
loopback  
Figure 6. TROCU DP Bidirectional Loopback  
Pass-Thru Mode  
If the TROCU DP bidirectional loopback is invoked after  
the TRDDS-R achieves synchronization, the TRDDS-R will  
not pass or receive data from the CPE or DDS test set. This  
is consistent with current DDS testing methods and is  
referred to as the TROCU DP bidirectional loopback normal  
mode. For testing purposes, the installer may choose to  
initiate the TRDDS-R to pass-thru mode. Once the  
bidirectional loopback is executed in normal mode, unseat  
and reseat the TRDDS-R and allow the unit to train-up.  
Once trained, the TRDDS-R will revert to pass-thru mode  
for further testing. Refer to Figure 7 for TRDDS operation  
during bidirectional loopback in normal mode.  
Provisioning and Status  
All configuration options can be remotely viewed or  
provisioned. The front panel Remote (REM) LED  
indicator will Flash during control link establishment  
and remains ON after the channel unit has been  
remotely provisioned.  
If the channel unit has been remotely provisioned, the  
operator can alternate between remote configuration  
4
Section 61291006L2, Issue 2  
61291006L2-5B  
 
and manual switch settings by pressing the  
momentary Alternate Provisioning (AP) switch  
located on the front panel. If the channel unit is  
removed from the system, the unit retains previous  
provisioning information in nonvolatile Random  
Access Memory (RAM).  
6. DEPLOYMENT GUIDELINES  
The TROCU DP and TRDDS-R use technology  
designed to eliminate the need for repeaters and  
concerns over impairments caused by typical noise and  
bridge tap. Table 2 describes cable loss for the  
TRDDS Nyquist frequency of 13.3 kHz. Listed below  
are the loop design guidelines for TRDDS (See Tables  
2 and 4 for more information).  
The REM indicator remains ON when the channel  
unit is operating based on Remote Provisioning, and  
is OFF when operating on manual switches. If the  
channel unit has never been remotely provisioned, the  
AP switch has no effect and the REM indicator  
remains OFF. See Table 3 for LED Indicators.  
All loops must be nonloaded.  
Actual Measured Loss (AML) should not  
exceed 50 dB at 13.3 kHz (135 termination),  
the Nyquist frequency of TRDDS.  
Table 3. LED Indicators  
NOTE  
INDICATOR  
DESCRIPTION  
The 50 dB AML limit includes 6 dB of signal  
margintoaccountforpotentialnear-endcross  
talk (NEXT) from other digital services that  
may be provisioned in the same binder group.  
SYNC LOSS ON indicates that there is no sync  
between the TROCU DP and the  
remote TRDDS-R; check for  
continuity, load coils, and other  
abnormal line conditions.  
NEAR CRC  
FAR CRC  
REM  
ON indicates that there are errors  
on the incoming data stream;  
check for the abnormal line  
conditions closer to the TROCU  
DP.  
Loop length should not exceed 50 kft.  
Bridged tap length should not exceed 12 kft.  
Background noise level should not exceed 34  
dBrn.  
Impulse noise level should not exceed -40 dBm,  
(+50 dBrn).  
ON indicates that there are errors  
occurring towards the remote  
TRDDS-R; check for the  
abnormal line conditions closer to  
the TRDDS-R.  
NOTE  
Measure noise with 50 kbit weighting  
characteristic approximating a filter with a  
passband of 40 Hz to 30 kHz. Background  
noise level or impulse noise level is referenced  
from 56/64 kbps data rate in TR62310.  
ON indicates that the unit has  
been remotely provisioned;  
FLASHING indicates that the  
remote control link is active.  
Push the AP button to toggle  
between manual and remote  
provisioning.  
QM DISC  
NO DSU  
ON indicates that the Quality  
Monitor Disconnect has occurred.  
Table 4. TRDDS Insertion Loss Measurements  
TRDDS  
13.3 kHz compared to 28 kHz for traditional  
DDS service  
ON indicates the absence of the  
customer DSU/CSU as  
determined by the TRDDS-R.  
LBK  
ON indicates the OCU or CSU  
loopback activation.  
Line  
@ 13.3 kHz  
@ 28 kHz  
Configuration  
27 kft 26 AWG  
36.25 kft 24 AWG  
50 kft 22 AWG  
IDLE  
ON indicates the presence of the  
Control Mode Idle toward the  
network.  
50.12 dB  
50.00 dB  
50.24 dB  
65.35 dB  
62.50 dB  
59.33 dB  
61291006L2-5B  
Section 61291006L2, Issue 2  
5
 
7. WARRANTY AND CUSTOMER SERVICE  
ADTRAN will replace or repair this product within 10  
years from the date of shipment if it does not meet its  
published specifications or fails while in service (see:  
ADTRAN Carrier Networks Equipment Warranty,  
Repair, and Return Policy and Procedure, document:  
60000087-10A).  
Contact Customer And Product Service (CAPS) prior  
to returning equipment to ADTRAN.  
For service, CAPS requests, or further information,  
contact one of the following numbers:  
ADTRAN Technical Support  
(800) 726-8663  
Standard hours: Monday-Friday, 7 a.m.-7 p.m. CST  
Emergency hours: 7 days/week, 24 hours/day  
ADTRAN Sales  
(800) 827-0807  
ADTRAN Repair/CAPS  
(256) 963-8722  
Repair and Return Address  
ADTRAN, Inc.  
CAPS Department  
901 Explorer Boulevard  
Huntsville, Alabama 35806-2807  
6
Section 61291006L2, Issue 2  
61291006L2-5B  
 

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