ADTRAN | Series 5 | Installation and Maintenance | Adtran Series 5 Installation and Maintenance

Adtran Series 5 Installation and Maintenance
Section 61433105L3-5A
Issue 1, April 1999
CLEI Code # 5SC53XTF_ _
Series 5 Total Reach DDS-DP
Total Reach® All-Rate DDS Dataport
Installation and Maintenance
CONTENTS
1. GENERAL .................................................................. 1
2. OPTIONS ................................................................... 2
3. INSTALLATION ....................................................... 3
4. TESTING .................................................................... 4
5. DEPLOYMENT GUIDELINES ................................ 5
6. WARRANTY AND CUSTOMER SERVICE ........... 6
FIGURES
Figure 1. Series 5 Total Reach DDS-DP ........................ 1
Figure 2. Total Reach DDS Circuit Diagram ................. 1
Figure 3. Option Switch ................................................. 2
Figure 4. OCU Loopback at the TRDDS-DP ................. 4
Figure 5. Total Reach DDS-DP Bidirectional Loopback
Pass-Thru Mode .............................................. 4
Figure 6. Total Reach DDS-DP Bidirectional Loopback
Normal Mode .................................................. 5
TABLES
Table 1.
Option Settings ................................................ 2
Table 2.
LED Indicators ................................................ 4
Table 3.
Cable Type and Temperature Loss
Data@13.3 kHz ............................................... 5
Table 4.
Series 5 Total Reach DDS Insertion Loss
Measurements ............................................... 6
1. GENERAL
This practice provides installation and maintenance
procedures for the ADTRAN Series 5 Total Reach®
DDS-DP All-Rate DDS Dataport. Figure 1 is an
illustration of the ADTRAN Series 5 Total Reach DDSDP.
The ADTRAN Series 5 Total Reach DDS-DP is a
functional replacement for the SLC® Series 5 OCU DP,
CLEI 5SCU48, delivering data at rates up to 64 kbps
using a single copper pair. Used in combination with the
TRDDS-R termination unit, the Series 5 Total Reach
DDS-DP can accommodate extended loop lengths,
eliminating the need for DDS repeaters. The Series 5
Total Reach DDS-DP span powers the TRDDS-R
located at the customer premises. The TRDDS-R
converts the two-wire signal to the traditional four-wire
Alternate Mark Inversion (AMI) signal for presentation
to the customer.
61433105L3-5A
3
105L
1433 SYNC
SX
CRC FE
NE
DSU
QM
AN
LBK
M
Figure 1. Series 5 Total Reach DDS-DP
The ADTRAN Series 5 Total Reach DDS-DP occupies a
single channel position in the AT&T® SLC Series 5 or
Series 5 compatible channel bank. 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. The Series 5 Total Reach DDS-DP
may interoperate over the carrier system with another
Total Reach DDS-DP, OCU DP, DS0 DP, 1/0 DCS, or
switch and may be located in an end office, hub office,
intermediate office, or Digital Loop Carrier (Figure 2).
The two-wire loop is connected using the odd pair Tip
(pin 31) and Ring (pin 32) on the Series 5 backplane.
SLC
SERIES 5
DLC
T-Carrier
TR
DDS-DP
Customer Premises
4-Wire Customer
Interface
2-Wire Loop
TRDDS-R
DSU/CSU
T/R Pair
Figure 2. Total Reach DDS Circuit Diagram
NOTE
The Series 5 Total Reach DDS-DP must be
used with an appropriate TRDDS-R unit.
Trademarks: Any brand names and
product names
included in this
document
Section
61433105L3,
Issue
1 are trademarks, registered trademarks,
or trade names of their respective holders.
1
Features
• Two-wire deployment
• Repeaterless operation
• Bridged tap tolerant
• Span power for remote TRDDS-R termination unit
• Utilization in SLC Series 5 channel bank
• Loop Quality Monitor and A/B signaling options
• Bidirectional OCU loopback capability
2. OPTIONS
The Series 5 Total Reach DDS-DP is provisioned
through the SLC Series 5 system and an on-board dual inline package (DIP) switch. SW1 provides feature options
not available through the SLC Series 5 channel bank
intelligent system. Use the SLC Series 5 Craft Interface
Unit (CIU) to provision intelligent channel bank features
supported by the Series 5 Total Reach DDS-DP. See
Figure 3 and Table 1 for option description and
provisioning.
Table 1. Option Settings
Software Provisioning via Series 5
Bank Controller Unit (BCU)
Function
Rate
Select 2.4, 4.8, 9.6, or 56 kbps
Error Correction (EC)
Select MVEC for 2.4, 4.8, 9.6,
19.2
Select SCEC for 56 & 64
Zero Code (ZC)
Yes or No
Secondary Channel
(SC)
Yes or No
Hardware Provisioning
via Series 5 Total Reach DDS-DP SW 1
64K
SW1-1 (64K)
ON selects 64 kbps
Clear Channel
1
NOTE
Select OCU DP, CLEI 5SCU48, when
provisioning via the CIU.
19.2K
SW1-2 (19.2K)
ON selects 19.2 loop rate
Switched 56
SW1-3 (SW56)
ON enables Switched 56
OFF disables Switched 56
A/B Signaling
SW1-4 (ABSIG)
ON maintains A/B signaling
OFF transparent to signaling
Quality Monitor
SW1-5 (QM)
ON enables Quality Monitor
OFF disables Quality Monitor
ON
2
3
SW1
1
4
5
64K
19.2K
SW56
ABSIG
QM
1
Figure 3. Option Switch
Error Correction
When error correction is enabled, the Series 5 Total
Reach DDS-DP provides an error detection and
correction capability that maintains data integrity across
the carrier facility. For subrate and 19.2 kbps rates, error
correction and data transmission is accomplished over a
single DS0 time slot using a Majority Vote Error
Correction (MVEC) algorithm. For error correction at
these rates, MVEC must be selected in the BCU via the
SLC Series 5 CIU.
2
Description
For 19.2 kbps Error Correction select 19.2 on SW1
and enable 9.6 MVEC with the SLC Series 5 CIU.
For rates of 56 and 64 kbps, error correction requires one
additional DS0 time slot for the error correcting parity
byte. The Series 5 Total Reach DDS-DP only allows
SCEC, the parity byte error correction scheme, at 56 and
64 kbps. When error correction is desired for 19.2 kbps
service, provision 9.6 kbps and MVEC via the CIU and
select 19.2 on SW1.
Section 61433105L3, Issue 1
61433105L3-5A
Zero Code
When Zero Code is enabled, the Series 5 Total Reach
DDS-DP allows DS0 bytes of all zeros to enter the
T-carrier data stream. On Alternate Mark Inversion
(AMI) facilities, this function should be disabled. B8ZS
carrier facilities that accommodate 64 kbps clear channel
operation do not require the zero code to be suppressed,
therefore zero code is automatically enabled when the 64
kbps rate has been selected.
NOTE
Only one rate should be selected. Service
rates of 64 kbps, 19.2 kbps, and Switched-56
are not supported by the SLC Series 5 BCU.
These operating modes must be provisioned
by enabling switches on SW1. A manual rate
setting overrides BCU rate settings. The
Series 5 Total Reach DDS-DP does not support
38.4 kbps.
When 64K (SW1-1) is ON, the Series 5 Total Reach
DDS-DP operates at 64K Clear Channel.
When 19.2K (SW1-2) is ON, the Series 5 Total Reach
DDS-DP operates at 19.2 kbps.
When SW56 (SW1-3) is ON, the Series 5 Total Reach
DDS-DP enables Switched-56 operation.
When A/B SIGNALING (SW1-4) is OFF, the unit
derives signaling from the incoming data stream. When
A/B SIGNALING is ON, the unit determines the state of
the A and B signaling bits using signals present on the
backplane of the channel bank. This method assumes
that proper signaling has been maintained throughout
network tandems and cross-connect systems.
NOTE
A/B option is only applicable when SW56 is
selected; otherwise it is a “don’t care.”
61433105L3-5A
When QUALITY MONITOR (SW1-5) is ON, the
Series 5 Total Reach DDS-DP monitors the incoming
two-wire loop and four-wire customer interface data
for errors. If excessive errors are detected, the unit
blocks the customer’s data transmission and sends
Abnormal Station Code to the network. Customer
data transmission is automatically restored when the
trouble condition is cleared.
3. INSTALLATION
C A U T I O N !
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
The ADTRAN Series 5 Total Reach DDS-DP plugs
directly into a SLC Series 5 channel bank. No special
wiring is required. The two-wire loop uses the T/R
(Tip and Ring) of the odd pair, pins 31 and 32 of the
SLC Series 5 backplane. The TRDDS-R is not
polarity sensitive, therefore the Series 5 Total Reach
DDS-DP will operate even when the T/R pair is
reversed.
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 V.
NOTE
The Series 5 Total Reach DDS-DP and
TRDDS-R typically require 30 to 90 seconds
to achieve synchronization. Once
synchronized, the SYNC LOSS indicator LED
will turn off. If synchronization cannot be
achieved, check the T/R pair for open or
short circuit conditions or load coils (See
Table 2).
Section 61433105L3, Issue 1
3
Table 2. LED Indicators
INDICATOR
DESCRIPTION
SX
ON indicates no sealing current
present on the local loop; check for
continuity and proper DDS
termination at remote end (TRDDSR).
SYNC
ON indicates that there is no sync
between the TRDDS-DP and the
remote TRDDS-R; check for
continuity, load coils, and other
abnormal line conditions.
NE CRC
ON indicates that there are errors on
the incoming data stream; check for
the abnormal line conditions closer
to the TRDDS-DP (NEAR END).
FE CRC
Total Reach DDS-DP Bidirectional Loopback
Support
The Series 5 Total Reach DDS-DP will execute a
bidirectional loopback when performing an OCU
loopback, as shown in Figure 4. If the TRDDS-R detects
a bidirectional loopback during power up
synchronization, the TRDDS-R allows data to pass on
the four-wire interface by entering into the pass-thru
mode (Figure 5). 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 Series
5 Total Reach DDS-DP LBK indicator will illuminate
during this test mode.
Series 5
TRDDS-DP
ON indicates that there are errors
occurring towards the remote
TRDDS-R; check for the abnormal
line conditions closer to the TRDDSR (FAR END).
QM
ON indicates that the Quality
Monitor Disconnect has occurred.
DSU
Yellow indicates the absence of the
customer DSU/CSU as determined
by the TRDDS-R. Disconnected
DSU/CSU, invalid framing pattern,
or no RX signal from the DSU/CSU
triggers a yellow LED.
Intra-office
OCU
Bidirectional
loopback
Figure 4. OCU Loopback at the TRDDS-DP
Series 5
TRDDS-DP
Green indicates presence of the
customer DSU/CSU as determined
by the TRDDS-R.
MAN
LBK
ON indicates rate has been manually
selected using SW1.
ON indicates the OCU or CSU
loopback activation.
4. TESTING
Testing for the Series 5 Total Reach DDS-DP is
accomplished using the same test procedures for fourwire OCU and OCU DP units.
NOTE
If 64 kbps is selected, the unit will only respond
to latching loopback sequences. Alternating
sequences are not valid at this rate.
4
Customer
TRDDS-R
Test Unit
Data
Pass-Thru
Bidirectional
loopback
Figure 5. Total Reach DDS-DP Bidirectional
Loopback Pass-Thru Mode
If an OCU 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 bidirectional loopback normal mode
(Figure 6). 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 unit will revert to pass-thru
mode for further testing.
Section 61433105L3, Issue 1
61433105L3-5A
Series 5
TRDDS-DP
TRDDS-R
X
X
DSU/CSU
Open Loop
NOTE
The 50 dB AML limit includes 6 dB of signal
margin to account for potential near-end cross
talk (NEXT) from other digital services that
may be provisioned in the same binder group.
Bidirectional
loopback
Figure 6. Total Reach DDS-DP Bidirectional
Loopback Normal Mode
5. DEPLOYMENT GUIDELINES
The Series 5 Total Reach DDS-DP and TRDDS-R use
technology intended to eliminate the need for repeaters
and concerns over impairments caused by typical noise
and bridged tap. Listed below are the loop design
guidelines for TRDDS (see Tables 3 and 4 for more
information):
• All loops must be nonloaded.
• Actual Measured Loss (AML) should not exceed 50
dB at 13.3 kHz (135 Ω termination), the Nyquist
frequency of TRDDS.
• 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 should not exceed
-40 dBm, (+50 dBrn).
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.
Table 3. Cable Type and Temperature Loss Data @ 13.3 kHz
PLASTIC CABLE
dB LOSS/kft
PAPER CABLE
dB LOSS/kft
19 Gauge PIC (0F)
19 Gauge PIC (70F)
19 Gauge PIC (120F)
0.5302
0.6083
0.6610
19 Gauge PULP (0F)
19 Gauge PULP (70F)
19 Gauge PULP (120F)
0.5616
0.6415
0.6955
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
61433105L3-5A
Section 61433105L3, Issue 1
5
Table 4. Series 5 Total Reach DDS Insertion
Loss Measurements
Total Reach DDS
13.3 kHz compared to 28 kHz for traditional
DDS service
Line
Configuration
6. 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 Network Equipment Warranty,
Repair, and Return Policy and Procedure, document
60000087-10A).
@ 13.3 kHz
@ 28 kHz
Contact Customer and Product Service (CAPS) prior
to returning equipment to ADTRAN.
27 kft 26 AWG
50.12 dB
65.35 dB
For service, CAPS requests, or further information,
contact one of the following numbers:
36.25 kft 24 AWG
50.00 dB
62.50 dB
50 kft 22 AWG
50.24 dB
59.33 dB
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.
Customer & Product Service (CAPS) Department
901 Explorer Boulevard
Huntsville, Alabama 35806-2807
6
Section 61433105L3, Issue 1
61433105L3-5A
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