Adtran Series 5 Installation and Maintenance

Section 61433105L2-5D
Issue 4, June 2000
CLEI Code # 5SC531PF_ _
Series 5 Total 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.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Series 5 Total Reach DDS-DP ........................... 1
Total Reach DDS Circuit Diagram .................... 2
Option Switch ..................................................... 2
DS0 Bidirectional Loopback .............................. 4
DDS Trouble Codes ........................................... 5
Remote End Initiated Loopback, Local Loop .... 6
Remote End Initiated Loopback, Customer
Loop .................................................................... 6
1433105
SYNC
CRC
NE
FE
QM
DSU
MAN
LBK
SW2
Figure 1. Series 5 Total Reach DDS-DP
Tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Option Settings ..................................................... 2
LED Indication ..................................................... 4
Latching Loopback Activation Sequence ............ 5
Alternating Loopback Activation Sequence ........ 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
61433105L2-5D
DDS-DP
SX
• 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 brandSection
names and
product names
included
in this document are trademarks,
61433105L2,
Issue
4
registered trademarks, or trade names of their respective holders.
1
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
2-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
Table 1. Option Settings
Software Provisioning via Series 5 BCU
Function
Rate
Select 2.4, 4.8, 9.6, or 56 kbps
Error Correction
(EC)
If rate is 2.4 through 19.2, select:
MVEC or NONE (SCEC not available
at these rates on this card.)
If rate is 56 through 64 kbps, select:
SCEC or NONE (MVEC is N/A at
these rates.)
Zero Code (ZC)
Yes or No
Secondary
Channel (SC)
Yes or No
Customer Premises
4-Wire Customer
Interface
2-Wire Loop
TR
DDS-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 Total Reach DDSR unit.
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.
Description
Hardware Provisioning via Dip Switch SW2
64K
SW2-1 (64K)
ON selects 64 kbps Clear Channel
19.2K1
SW2-2 (19.2K)
ON selects 19.2 loop rate
Switched 56
SW2-3 (SW56)
ON enables Switched 56
OFF disables Switched 56
A/B Signaling
SW2-4 (ABSIG)
ON the unit determines the state of the
A and B signaling bits using signals
present on the channel bank backplane.
OFF the unit derives signaling from
the incomming data stream.
Quality Monitor
SW2-5 (QM)
ON enables QM
OFF disables QM
1
For 19.2 kbps Error Correction select 19.2 on SW2 and
enable 9.6 MVEC with SLC Series 5 CIU.
ON
2
3
SW2
1
4
5
64K
19.2K
SW56
ABSIG
QM
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.
Figure 3. Option Switch
NOTE
Select OCU DP, CLEI 5SCU48, when
provisioning via the CIU.
Error Correction
When error correction is enabled the Series 5 Total Reach
DDS-DP provides an error detection and correction
2
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.
Section 61433105L2, Issue 4
61433105L2-5D
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.
Rate Selections
When 64K (SW2-1) is ON, the Series 5 Total Reach
DDS-DP operates at 64K Clear Channel.
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
C A U T I O N !
When 19.2K (SW2-2) is ON, the Series 5 Total Reach
DDS-DP operates at 19.2 kbps.
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.
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
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.
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.
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.
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
NOTE
A/B signaling option is only applicable when
SW56 is selected; otherwise it is a “don’t care.”
3. TESTING
Testing for the Series 5 Total Reach DDS-DP is
accomplished using the same test procedures for 4-wire
61433105L2-5D
Section 61433105L2, Issue 4
3
Table 2. LED Indication
Indicator
Description
SX
ON indicates no sealing current present
on the local loop; check for continuity
and proper DDS termination at remote
end (TR DDS-R).
SYNC
ON indicates that there is no sync
between the TR DDS-DP and the remote
TR DDS-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
TR DDS-DP (NEAR END).
FE CRC
ON indicates that there are errors
occurring towards the remote TR DDSR; check for the abnormal line
conditions closer to the TR DDS-R
(FAR END).
QM
ON indicates that a Quality Monitor
Disconnect has occurred.
DSU
Yellow indicates the absence of the
customer DSU/CSU as determined by
the TR DDS-R. Disconnected
DSU/CSU, invalid framing pattern, or
no RX signal from the DSU/CSU
triggers a yellow LED.
Green indicates presence of the customer
DSU/CSU as determined by the TR
DDS-R.
MAN
ON indicates rate has been manually
selected using SW2.
LBK
ON if DSO loopback is active,
OR if a DS6 session is active.
FLASHING if OCU loopback active,
OR if TR DDS-R has activated TR
DDS-DP loopback toward customer.
DS0 DP units. The Total Reach DDS-DP only responds
to latching DS0 DP loopback sequences.
NOTE
If 64 kbps is selected, the unit will only respond
to latching loopback sequences. Alternating
sequences are not valid at this rate.
4
Total Reach DDS-DP Bidirectional Loopback
Support
The Series 5 Total Reach DDS-DP will execute a
bidirectional loopback when performing a DS0 loopback,
as shown in Figure 4. This allows a standard portable
DDS test set, connected to the 4-wire customer
interface of the Total Reach DDS-R, to verify the integrity
of the 2-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
TR
DDS-DP
Intra-office
Customer
DS0
Bidirectional
loopback
Figure 4. DS0 Bidirectional Loopback
The Series 5 Total Reach DDS-DP also responds to a
loopback command sent by the Total Reach DDS-R
when the LBK button on the Total Reach DDR-R is
pressed. This allows loop testing to be performed from
the remote end without test center coordination. The
SLC Series 5 Total Reach DDS-DP only performs a
loopback towards the customer in this case. The latching
and alternating loopback sequences are defined in Table
3 and Table 4.
Total Reach DDS Trouble Code
The Total Reach DDS system is designed to provide a
quick diagnosis in the case of a circuit condition
where continuity is broken. The trouble code type
received by a tester determines whether the open
condition is occurring on the local loop or at the
customer premises. In the event of an open conductor
or disconnected 2-wire loop, the Total Reach DDS-DP
transmits an alternating ASC/MOS trouble code into
the network as shown in Figure 5. In the event of a
4-wire open or disconnect, the TR DDS-R sends an
ASC to the network as seen in Figure 5.
Remote End Initiated LBK Tests
The Total Reach DDS-DP supports loopbacks
generated from the TROCU-R which allow testing to
be performed without coordination with the CO or test
center. Loopbacks initiated by the TROCU-R front
panel LBK pushbutton aid in system turn-up testing or
troubleshooting from the remote end.
Section 61433105L2, Issue 4
61433105L2-5D
Table 3. Latching Loopback Activation Sequence
Sequence
Function
Clear existing
loopbacks
Byte Code
Transition in
progress (TIP)
X0111010
Identify device to Loopback select
be looped
code (LSC)
X0000101 - DS0
X1010101 - OCU
X0110001 - CSU
X1000001 - NIE
Number of
Received
Bytes
TR
DDS
DP
TR
DDS-R
DSU
Customer Premises
Channel Bank
Open 4-Wire Customer
Interface
Minimum of
35 LSC bytes
TR
DDS
DP
ASC 9Eh
ASC 9Eh
TR
DDS-R
DSU
Figure 5. DDS Trouble Codes
Loopback enabled
(LBE)
X1010110
Minimum of
100 LBE bytes
Activate
loopback
Far-End voice
(FEV)
X1011010
Minimum of
32 FEV bytes
Minimum of 35 TIP bytes required to disable established
latching loopback.
X = Don't Care bit
Table 4. Alternating Loopback Activation Sequence
Received Bytes
Active loopback
Four consecutive bytes of
specified loopback code
X0101010 - OCU
X0101000 - CSU
X0101100 - DSU
Maintain loopback and
test for bit errors
Data byte alternating with
loopback code
example:
XDDDDDD1/X0101010
Clear loopback
Four consecutive data bytes
without alternating loopback
code
X = Don't care bit
The TR DDS-DP will respond to a loopback
command initiated at the TROCU-R as follows:
• Pressing the TROCU-R LBK pushbutton once
will initiate a loopback at the TR DDS-DP
towards the customer. See Figure 6.
61433105L2-5D
Open 2-wire Loop
Alternating
MOS 9Ah/ASC 9Eh
Minimum of
35 TIP bytes
Prepare to loop;
send MAP code
after 30 bytes
Sequence
Function
Customer Premises
Channel Bank
This allows data to be sent from the remote end to test
the local loop and the TROCU-R. This loopback is
indicated by a flashing CUST LED on the TROCU-R
and a solid CUST LED on the Total Reach DDS-DP.
• Pressing the LBK pushbutton a second time
initiates a loopback at the TROCU-R towards the
4-wire DDS (CPE) interface. See Figure 7.
A solid CUST LBK LED on the TROCU-R indicates a
loopback at the TROCU-R towards the customer
equipment.
• Pressing the TROCU-R LBK pushbutton a third
time disables all current latching loopbacks
initiated by the TROCU-R LBK pushbutton.
If errors exist the loopbacks can help determine the
source; either the local loop or the TROCU-R. During
a remote end initiated loopback the Total Reach
system transmits ASC 9Eh towards the network,
indicating an out-of-service condition generated by the
remote end as shown in Figures 6 and 7.
4. 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 Total Reach DDS network
elements comply with ANSI T1.107-1995, “ Digital
Hierarchy Format Specifications Annex G” which allows
remote provisioning, querying, and performance
monitoring via in-band control of network elements.
Section 61433105L2, Issue 4
5
NOTE
The REACT 2001 GUI software Release 1.900
supports ANSI T1.107-1995.
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 in-band 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.
NOTE
Due to SLC Series 5 channel bank BCU
constraints, provisioning of the Series 5 Total
Reach DDS-DP may be viewed but not
changed via Digital System 6.
Out-of-Band Diagnostics
In addition to in-band access to Series 5 Total Reach
DDS-DP performance diagnostics and provisioning
via Digital System 6, access is also available out-ofband (non-intrusively) via the craft interface located
on the Total Reach DDS-R. The Total Reach DDS-R
displays provisioning information, Total Reach
system status, performance monitoring information
stored in 15 minute and 24 hour registers for both the
Series 5 Total Reach DDS-DP and Total Reach DDSR and an event log which time stamps system
performance anomalies and threshold violations.
Physical access to the terminal interface on the Total
Reach DDS-R is made by a serial interface connection
to a dumb terminal or dumb terminal emulation.
Provisioning of the Series 5 Total Reach DDS-DP
may be viewed but not changed from the terminal
interface on the Total Reach DDS-R. Further
information about the Total Reach DDS-R terminal
interface and performance monitoring may be found
in the Total Reach DDS-R practice part number
61291023L2-5A
5. DEPLOYMENT GUIDELINES
The Series 5 Total Reach DDS-DP and Total Reach
DDS-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 Total Reach DDS (see Table 5 and
Table 6 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 Total Reach DDS.
4-Wire
CPE Interface
ASC 9Eh
TR
DDS
DP
Local Loop
TR
OCU-R
Loopback
Pushbutton
Test
Set
Push once for Total Reach
DDS-DP Loopback
Figure 6. Total Reach OCU-R Remote End Initiated Loopback, Local Loop
ASC 9Eh
ASC 9Eh
TR
DDS
DP
Local Loop
4-Wire
CPE Interface
TR
OCU-R
Loopback
Pushbutton
Test
Set
Push twice for TROCU-R
Loopback
Figure 7. Total Reach OCU-R Remote End Initiated Loopback, Customer Loop
6
Section 61433105L2, Issue 4
61433105L2-5D
Table 5. 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)
1.6751
1.8469
1.9608
26 Gauge PULP (0F)
26 Gauge PULP (70F)
26 Gauge PULP (120F)
1.6823
1.8568
1.9718
Table 6. Series 5 Total Reach DDS Insertion
Loss Measurements
DDS
13.3 kHz compared to 28 kHz for traditional
DDS service
Line
Configuration
@ 13.3 kHz
@ 28 kHz
27 kft 26 AWG
50.12 dB
65.35 dB
36.25 kft 24 AWG
50.00 dB
62.50 dB
50 kft 22 AWG
50.24 dB
59.33 dB
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.
6. MAINTENANCE
The Total Reach DDS-DP does not require routine
maintenance for normal operation.
Compliance Requirements
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.
• 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).
61433105L2-5D
CAUTION
This product for installation in a restricted
access location in a Type B or E enclosure
only.
Max input current @ max load = 165 mA @ -48 Vdc.
Max output current @ max load = 41 mA @
-140 Vdc.
Table 7. Compliance Codes
Code
Input
PC
TC
IC
F
–
A
Section 61433105L2, Issue 4
Output
C
X
–
7
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 Sales
Pricing and availability
(800) 827-0807
ADTRAN Technical Support
Presales Applications / Post-sale Technical Assistance
(800) 726-8663
Standard support hours:
Monday-Friday, 7 a.m. - 7 p.m. CST
Emergency support: 7 days/week, 24 hours/day
ADTRAN Repair/CAPS
Return for repair / upgrade
(256) 963-8722
Repair and Return Address:
ADTRAN, Inc.
CAPS
901 Explorer Boulevard
Huntsville, Alabama 35806-2807
8
Section 61433105L2, Issue 4
61433105L2-5D