ADTRAN DDS-DP User Manual
Series 5 T otal Reach DDS-DP
Total Reach All-Rate DDS Dataport
Installation and Maintenance
CONTENTS
1. GENERAL ...................................................................... 1
2. INSTALLATION ........................................................... 3
3. TESTING ........................................................................ 3
4. REMOTE PROVISIONING AND DIAGNOSTICS ..... 5
5. DEPLOYMENT GUIDELINES .................................... 6
6. MAINTENANCE ........................................................... 7
7. WARRANTY AND CUSTOMER SERVICE ............... 8
Figures
Figure 1. Series 5 Total Reach DDS-DP ........................... 1
Figure 2. Total Reach DDS Circuit Diagram .................... 2
Figure 3. Option Switch ..................................................... 2
Figure 4. DS0 Bidirectional Loopback .............................. 4
Figure 5. DDS Trouble Codes ........................................... 5
Figure 6. Remote End Initiated Loopback, Local Loop .... 6
Figure 7. Remote End Initiated Loopback, Customer
Loop .................................................................... 6
Tables
Table 1. Option Settings..................................................... 2
Table 2. LED Indication..................................................... 4
Table 3. Latching Loopback Activation Sequence ............ 5
Table 4. Alternating Loopback Activation Sequence ........ 5
Table 5. Cable Type and Temperature Loss Data @
13.3 kHz ............................................................... 7
Table 6. Total Reach DDS Insertion Loss
Measurements ...................................................... 7
Table 7. Compliance codes ................................................ 7
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
DDS-DP (P/N 1433105L5).
Revision History
This is the initial release of this document. Future
revisions will be described in this subsection.
Features
• 2-wire deployment
• Repeaterless operation
• Bridged tap tolerant
• Span power for remote Total Reach DDS-R
termination unit
• Utilization in SLC Series 5 and Series 2000 channel
banks
®
Section 61433105L2-5D
Issue 4, June 2000
CLEI Code # 5SC531PF_ _
DDS-DP
1433105
SX
SYN
C
CRC
FE
NE
D
SU
Q
M
LBK
MAN
SW2
Figure 1. Series 5 Total Reach DDS-DP
• Loop Quality Monitor and A/B signaling options
• Bidirectional DS0 loopback capability
• Transmits Mux Out of Sync code upstream during
out of service loop condition.
• Embedded Digital System 6 capabilities for remote
provisioning, and performance monitoring.
Description
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
Total Reach DDS-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 Total
Reach DDS-R located at the customer premises. The
Total Reach DDS-R converts the 2-wire signal to the
traditional 4-wire Alternate Mark Inversion (AMI) signal
for presentation to the customer.
The ADTRAN Series 5 Total Reach DDS-DP
®
occupies a single channel position in the AT&T
SLC
Series 5 and Series 2000 or Series 5 compatible
channel bank. It provides the interface between a DS0
timeslot of the T-carrier data stream and the 2-wire
metallic loop extending to the customer premises. The
Trademarks: Any brand names and product names included in this document are trademarks,
registered trademarks, or trade names of their respective holders.
161433105L2-5D Section 61433105L2, Issue 4
Series 5 Total Reach DDS-DP may interoperate over
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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
2-wire loop is connected using the odd pair Tip (pin
31) and Ring (pin 32) on the Series 5 backplane.
SLC
T-Carrier
SERIES 5
DLC
TR
DDS-DP
2-Wire Loop
T/R Pair
Customer Premises
4-Wire Customer
Interface
TR
DDS-R
DSU/CSU
Figure 2. Total Reach DDS Circuit Diagram
NOTE
The Series 5 Total Reach DDS-DP must be
used with an appropriate Total Reach DDSR unit.
Table 1. Option Settings
Options
The Series 5 Total Reach DDS-DP is provisioned
through the SLC Series 5 system and an on-board DIP
switch. SW2 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.
Error Correction
When error correction is enabled the Series 5 Total Reach
DDS-DP provides an error detection and correction
2 61433105L2-5DSection 61433105L2, Issue 4
ON
1
2345
SW2
64K
19.2K
SW56
ABSIG
QM
Figure 3. Option Switch
NOTE
Select OCU DP, CLEI 5SCU48, when
provisioning via the CIU.
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.
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 SW2.
Zero Code
C A U T I O N !
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
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.
Rate Selections
When 64K (SW2-1) is ON, the Series 5 Total Reach
DDS-DP operates at 64K Clear Channel.
When 19.2K (SW2-2) is ON, the Series 5 Total Reach
DDS-DP operates at 19.2 kbps.
Quality Monitor
When QM (SW2-5) is ON, the TR DDS-DP monitors
the 2-wire loop and 4-wire customer interface for data
errors. Excessive errors on the 2-wire loop cause the
unit to send an alternating ASC (9Eh)/MOS (9Ah) to
the network. Excessive errors on the 4-wire customer
interface cause the unit to send an ASC to the
network. In both cases customer transmission is
blocked. When the trouble condition clears
transmission is automatically restored.
2. INSTALLATION
When SW56 (SW2-3) is ON, the Series 5 Total Reach
DDS-DP enables Switched-56 operation.
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 SW2. A manual rate
setting overrides BCU rate settings. The Series
5 Total Reach DDS-DP does not support 38.4
kbps.
The Total Reach DDS-DP can also be used in the SLC2000 channel bank but the card must still be provisioned
similar to the SLC-5 options. That is, 64 kbps operation
the card is switch selected for 64 kbps while the assigned
slot is selected for 56 kbps. For 19.2 kbps operation the
card is switch selected for 19.2 kbps while the assigned
slot is set for 9.6 kbps.
After unpacking the unit, inspect it for damage. If
damage is noted, file a claim with the carrier, then
contact ADTRAN. See Warranty and Customer
Service.
Tip/Ring Pair
The ADTRAN Series 5 Total Reach DDS-DP plugs
directly into a SLC Series 5 channel bank. No special
wiring is required. The 2-wire loop uses the T/R (Tip
and Ring) of the odd pair, pins 31 and 32 of the SLC
Series 5 backplane. The Total Reach DDS-R is not
polarity sensitive, therefore the Series 5 Total Reach
DDS-DP will operate even when the T/R pair is
reversed.
Span Power
Span powering is accomplished using -130 Vdc
measured from Tip to Ring. Voltage measured from
Tip to GND should indicate -130 Vdc or less
depending on input impedance of the measuring
device. However, voltage measured from Tip to Ring
should always indicate about -130 Vdc.
Signaling
When A/B SIGNALING (SW2-4) 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 signaling option is only applicable when
SW56 is selected; otherwise it is a “don’t care.”
Synchronization and LED Indication
The Series 5 Total Reach DDS-DP and Total Reach
DDS-R typically require 30 to 90 seconds to
synchronize. When 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. Refer to
Table 2 for synchronization and operational status
indication
3. TESTING
Testing for the Series 5 Total Reach DDS-DP is
accomplished using the same test procedures for 4-wire
361433105L2-5D Section 61433105L2, Issue 4
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