The ADTRAN 1000 is a high-performance subscriber loop carrier system, designed to deliver voice services with up to 24 POTS channels from a 4-wire HDSL span. It supports both integrated and universal configurations, providing flexibility in deployment. The device features a compact and versatile platform with pole or wallmount options, making it suitable for various installation scenarios.
The ADTRAN 1000 is a high-performance subscriber loop carrier system, designed to deliver voice services with up to 24 POTS channels from a 4-wire HDSL span. It supports both integrated and universal configurations, providing flexibility in deployment. The device features a compact and versatile platform with pole or wallmount options, making it suitable for various installation scenarios.
61179001L1-5C Section 61179001L1-5, Issue 3 1
Section 61179001L1-5C
Issue 3, April 2003
CLEI Code: VAM2KL0F_ _
ADTRAN Total Access
®
1000 RT
Installation and Maintenance
Trademarks: Any brand names and product names included in this document are
trademarks, registered trademarks, or trade names of their respective holders.
CONTENTS
1. GENERAL ................................................................... 1
2. INSTALLATION/OPERATION................................. 5
3. PROVISIONING ......................................................... 8
4. TESTING ...................................................................12
5. HDSL DEPLOYMENT GUIDELINES ....................13
6. HLIU TROUBLESHOOTING PROCEDURES ....... 14
7. SPECIFICATIONS .................................................... 14
8. ORDERING GUIDE..................................................15
9. MAINTENANCE ...................................................... 15
10. WARRANTY AND CUSTOMER SERVICE ..........15
Appendix A. HDSL Loopbacks .................................... A-1
FIGURES
Figure 1. Total Access 1000 RT Enclosure ................... 1
Figure 2. Total Access 1000 Inside Layout ................... 2
Figure 3. Universal Configuration ................................. 3
Figure 4. Integrated Configuration ................................. 3
Figure 5. Total Access 1000 Component Layout and
Cable Connections .......................................... 7
Figure 6. Total Access 1000 RT Tree .......................... 10
Figure 7. Circuit Path ................................................... 11
Figure 8. HDSL Loopback ........................................... 12
Figure 9. CSA Deployment Guidelines ........................13
TABLES
Table 1. Compliance Codes .......................................... 5
Table 2. Total Access 1000 Time Slot Assignments .... 6
Table 3. Front Panel Indicators (BCU) ......................... 8
Table 4. Front Panel Indicators (HLIU) ........................ 8
Table 5. Face Plate Indicators (POTS) ......................... 8
Table 6. HDSL Loss Values........................................13
Table 7. Loop Insertion Loss Data ..............................14
Table 8. HLIU Troubleshooting Guide ....................... 14
Table 9. Specifications ................................................14
Table 10. Ordering Guide ............................................. 15
Table A-1. HDSL Loopback Control Codes ................ A-1
Table A-2. In-Band Addressable Loopback Codes ..... A-2
Figure 1. Total Access 1000 RT Enclosure
1. GENERAL
This practice provides installation and maintenance
procedures for the ADTRAN Total Access 1000 RT
subscriber loop carrier. Figure 1 is an illustration of
the Total Access 1000 RT enclosure.
Revision History
This is the third release of this document. Future
revisions will be explained in this subsection.
Features
The Total Access 1000 RT platform features include
the following:
• Pole or Wallmount
• HDSL span powered at +/-135 VDC
• Three common units:
- Power Supply/Ring Generator (PSU/RGU)
- Bank Controller Unit (BCU)
- HDSL Line Interface Unit (HLIU)
• Quad POTS channel unit
• Supports 56k modem (V.90) in integrated
configuration
• Supports TR-08 interface
• Supports local and remote provisioning
• Total Access 1500 used for COT universal
configuration
• Supports Mechanized Line Test (MLT)
• GR-487 Compliance for Remote Enclosures
• Meets NEBS Level 3 requirements
2 Section 61179001L1-5, Issue 3 61179001L1-5C
Description
The Total Access 1000 RT is a high performance
Subscriber Loop Carrier system for deploying voice
services. A small and versatile platform, the Total
Access 1000 RT system uses span powering to deliver
24 POTS services from a 4-wire HDSL span. This
design provides carriers the flexibility needed to meet
customer service commitments.
Physical Description
The Total Access 1000 RT enclosure is 12.7 inches
wide by 14.7 inches high by 5.5 inches deep and is
made of heavy gauge metal. The enclosure can be wall
or pole mounted. Figure 2 shows the inside layout of
the Total Access 1000 RT. Individual access modules
insert from the front. All of the facilities terminate
within the enclosure. Surge protection is also
provided within the enclosure.
The HLIU card provides the network interface for the
Total Access 1000 RT system. The HLIU terminates
the HDSL signals and passes span powering to the
PSU/RG. The HDSL signal is converted to a DSX-1
level signal and passed to the BCU.
The PSU/RG terminates the span power from the
network and provides regulated operating voltages to
all components within the Total Access 1000 RT
system. The PSU/RG also provides a 20Hz ring
signal which is distributed to the Quad POTS access
modules.
The BCU terminates the DSX-1 signal from the
HLIU. It also terminates the DS0 level signals to the
POTS cards. The BCU provides the access point for
provisioning, testing, and monitoring system
performance.
The Quad POTS access module provides the DS0
level interface to the BCU. It also provides four
2-wire subscriber loop interfaces for voice services. A
fully loaded system uses six Quad POTS cards for 24
voice services.
The Total Access 1000 RT system receives span
powering from the network using a Total Access 1000
integrated COT. The ICOT terminates a DSX-1
interface from the COT or switch. It converts the
DSX-1 signal to 4-wire HDSL and adds span
powering.
The Total Access 1000 RT system can be deployed in
an integrated configuration (Figure 3) or a universal
configuration (Figure 4). When used in the integrated
configuration, a switch provides a DSX-1 to the
ICOT, the ICOT converts the DSX-1 to HDSL and
adds span powering. The Total Access 1000 RT
terminates the HDSL and span powering, converts the
HDSL to DSX-1, and provides up to 24 subscriber
interfaces.
In the universal configuration, the Total Access 1000
RT interoperates with the Total Access 1500 COT.
The Total Access 1500 COT provides the twenty-four
2-wire interfaces to the switch and, in turn, provides
the DSX-1 interface to the ICOT.
Figure 2. Total Access 1000 Inside Layout
Architecture
The Total Access 1000 RT system is comprised of an
outside plant (OSP) housing, HDSL Line Interface
Unit (HLIU), Power Supply Unit/Ring Generator
(PSU/RGU), Bank Controller Unit (BCU), and POTS
or ISDN access modules.
The OSP housing contains all external terminations
including the HDSL interface, auxiliary powering
interface, bypass pair termination, subscriber loop
termination, and grounding terminations. The OSP
housing also provides surge protection for the network
and subscriber interfaces. The network and subscriber
interface terminations are insulation displacement
type.
1
B
U
S
Y
1
2
3
4
B
U
S
Y
1
2
3
4
B
U
S
Y
1
2
3
4
B
U
S
Y
1
2
3
4
B
U
S
Y
1
2
3
4
B
U
S
Y
2
3
4
P
O
W
E
R
R
G
O
N
R
G
D
I
S
L
O
O
P
1
L
O
O
P
2
T
E
S
T
A
L
A
R
M
A
D
M
I
N
61179001L1-5C Section 61179001L1-5, Issue 3 3
Figure 3. Integrated Configuration
Testing
The Total Access 1000 RT system has full MLT test
capabilities. When in universal configuration, the
COT (Total Access 1500, SLC96, etc.) can be
connected to a Pair Gain Test Controller (PGTC) for
metallic testing of all subscriber loops. When in
integrated configuration, a bypass pair from the Test
Bus Control Unit (TBCU) can be connected to the
Total Access 1000 RT. Again, any subscriber loop
can be placed on the bypass pair.
Additionally, the craft interface provides test access to
the subscriber loops. The system can generate
on-hook and off-hook states. As well as, generate
1000 Hz tone.
Environmental Requirements
Operating Temperature: –40°C to +65°C
Storage Temperature: –40°C to +85°C
Relative Humidity: 95%, noncondensing
Span Power
The Total Access 1000 RT is completely powered
from the HDSL span. An ADTRAN Total Access
1000 ICOT (E220, 3192, or Total Access 3000 form
factors) powers the Total Access 1000 RT system.
The span length can be extended by allocating two
additional pairs to power a mid-span repeater. This
increases the deployment range from 9-12 kft to 18-24
kft. See HDSL Deployment Guidelines section.
WARNING
Risk of electric shock. Voltages up to 135 VDC
may be present on telecommunications circuit.
The incoming HDSL span is terminated on P2 and P3
(see Figure 5). This termination provides surge
protection and protection from corrosion. P4 and P5
are auxiliary powering pairs for use in extended range
situations (future).
Span powering meets all requirements of Class A2
voltages as specified by Bellcore GR-1089-CORE.
Common Modules
PSU
General Description
The Total Access 1000 RT PSU is a common module
plug-in unit designed for use in the ADTRAN Total
Access 1000 RT. The front panel contains LEDs for
Figure 4. Universal Configuration
4 Section 61179001L1-5, Issue 3 61179001L1-5C
Power and Ring Generation states. The PSU also
contains a switch for disabling the ring generator. All
power, ground, and timing signals are prewired thus
eliminating additional wiring requirements.
The PSU does not require provisioning to operate in
the system.
Features
The Total Access 1000 RT PSU/RGU, P/N
1179007L1, includes the following features:
• Receives unregulated power input from HDSL
I/F
• Distributes all required regulated power
• Generates 20 Hz ring voltage
• Loss of power alarm
• Loss of ring voltage alarm
• Ring generator failure alarm
• Provision-free POTS turnup
• FCC and UL 1950 compliant
• Meets NEBS Level 3 requirements
Functional Description
The Total Access 1000 RT PSU operates on ±70
VDC to ±135 VDC received from the span-powered
HDSL pairs.
The PSU converts the incoming span power to
regulated voltages for distribution to other modules in
the system.
A ring generator within the PSU generates a 95 Vrms,
20 Hz ring voltage for distribution to the channel
bank’s POTS cards. Ring voltage is disabled by
pressing the RING DISABLE pushbutton. When ring
voltage is disabled, the RING LED is OFF.
HLIU
General Description
The ADTRAN Total Access 1000 RT HLIU,
P/N 1179009L1, is a network terminating common
plug-in unit used to terminate the HDSL circuit over
4-wire metallic facilities. The HLIU terminates the
HDSL signals originating from the ICOT and hands
off a DSX-1 to the BCU.
The HDSL local loop operates as two independent
subsystems each operating over a single twisted pair.
The HLIU communicates over these two twisted pairs
to the Total Access 1000 ICOT located at the CO.
BCU
General Description
The Total Access 1000 RT Bank Controller Unit
(BCU) is a common module plug-in unit. The unit
inserts directly into the BCU slot on the Total Access
1000 RT shelf. The unit terminates the DSX-1 from
the HLIU and provides 24 DS0s to the access module
slots. The BCU, with a built-in CSU, provides all
control functions for the Total Access 1000 RT
common units and access modules. The front panel
has one DB-9 connection, a network status LED, a
TEST status LED, and an LED/ACO pushbutton
switch.
Features
The Total Access 1000 RT BCU, P/N 1179012L1,
includes the following features:
• Controls all common equipment and access
modules
• Built-in Channel Service Unit (CSU)
• Provides VT100 craft interface via front panel
DB-9 connector
• LED network status indication
• T1 performance monitoring
• Supports TR-08 signaling
• UL 1950 compliant
• Meets NEBS Level 3 requirements
Functional Description
The Total Access 1000 RT BCU provisions, operates,
monitors, and tests all Total Access 1000 RT access
modules. The BCU allocates T1 bandwidth between
the various access modules.
The BCU multiplexes 24 DS0s from all RT access
modules within the RT enclosure. The BCU can
provision, test, and provide status for any card in the
channel bank.
Access Modules
POTS
General Description
The Quad POTS access module is used in the Total
Access 1000 RT platform to provide analog voice
service. The Quad POTS access module originates
four 2-wire analog voice interfaces over the subscriber
loop. The Quad POTS access module terminates to
the customer’s equipment on the far end of the
subscriber loop.
The unit is multifunctional and can be provisioned to
operate in any one of the following modes:
61179001L1-5C Section 61179001L1-5, Issue 3 5
• Plain Old Telephone Service (POTS)
• Dial Pulse Originate (DPO)
• Tandem Mode
• Private Line Automatic Ringdown (PLAR)
The features of the Total Access 1000 RT Quad
POTS, P/N 1179408L1, include:
• Four individual analog voice interfaces
• Automatic short loop provisioning feature
• µ-law encoding and decoding
• Supports ground start, loop start, and TR-08
signaling
• Long loop capability 1650 ohms (nominal)
including telephone set (16 kfeet @ 24 AWG)
• Hot Swappable
• V.90 Modem compliant
• Supports CLASS
TM
features such as Caller ID
• Transmit attenuation setting of 0 dB to -9 dB
• Receive attenuation setting of 0 dB to -9 dB
• Selectable 600W, 900W, 600W+2.16µF, or
900W+2.16µF 2-wire VF interface
• Occupies a single slot in the Total Access 1000
RT Chassis
• UL 1950 compliant
• Extended temperature range of –40°C to +65°C
• Call Forward Disconnect
• Meets NEBS Level 3 requirements
2. INSTALLATION/OPERATION
C A U T I O N
C A U T I O N
!
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. Refer to Warranty and Customer
Service.
The Total Access 1000 RT can be wall or pole
mounted. Templates are provided with each system to
support accurate mounting of the enclosure.
The Total Access 1000 RT complies with Part 15 of
the FCC rules. Operation is subject to the following
two conditions:
1. This device may not cause harmful interference,
and
2. This device must accept any interference
received, including interference that may cause
undesired operation.
Changes or modifications not expressly approved by
ADTRAN could void the user’s authority to operate
this equipment.
Compliance
See Table 1 for Compliance Codes.
Table 1. Compliance Codes
edoCtupnItuptuO
)sissahC(
)CP(edoCrewoP
)CT(edoCnoitacinummoceleT
)CI(edoCnoitallatsnI
C
X
E
C
X
–
)USP(
)CP(edoCrewoP
)CT(edoCnoitacinummoceleT
)CI(edoCnoitallatsnI
C
X
A
C
–
–
)UILH(
)CP(edoCrewoP
)CT(edoCnoitacinummoceleT
)CI(edoCnoitallatsnI
C
X
A
C
–
–
)STOP(
)CP(edoCrewoP
)CT(edoCnoitacinummoceleT
)CI(edoCnoitallatsnI
C
X
E
C
–
–
CAUTION
Per GR-1089-CORE October 2002, Section 9,
the Total Access 1000 system is designed and
intended only for installation in a DC-C
(common) Bonding and Grounding system. It is
not intended or designed for installation in a
DC-I (isolated) Bonding and Grounding system.
Required Clearances
A minimum 18 inches of clearance is required in front
of the chassis to allow for opening of the enclosure
door.
Mounting Brackets
The Total Access 1000 RT enclosure contains
brackets that support wall or pole mounting.
Tools Needed (Wallmount or Pole Mount)
The Total Access 1000 RT Chassis mounts and
connects with standard fasteners and hand tools:
• Six #6 by 3/4-inch, flat-head wood screws
• Drill and drill bit set
• Flat-head screwdriver (medium)
• Two Phillips-head screw drivers (small/medium)
6 Section 61179001L1-5, Issue 3 61179001L1-5C
Table 2. Total Access 1000 Time Slot
Assignments
tolSlacisyhPdengissAtolSemiT1T
14-1
28-5
321-9
461-31
502-71
642-12
• Selected punch-down block and tool
• Mounting template (included)
Mounting The Enclosure
Install the enclosure as follows:
1. Position the mounting template at the desired
location, observe required clearances.
2. Ensure the mounting template is plumb then
mark through the template holes to identify
where the pilot holes will be drilled.
3. Using a 1/16-inch bit, drill pilot holes at the
marked locations.
4. Mount the chassis using the six #6 by 3/4-inch
flat-head wood screws.
Connections
All subscriber loop and network connections are made
through termination blocks. See Figure 5.
Connections for the commons and access modules are
made through the backplane. No additional backplane
wiring is necessary for operation.
UL Deployment Guidelines
• Terminate enclosure to a reliable ground source.
NOTE
Use 6 AWG wire for a solid ground connection
to the Total Access 1000 RT. Route the ground
wire through the smallest strain relief on the
bottom of the enclosure. Connect this end to the
grounding lug mounted on the ground bar.
Terminate the other end to a reliable ground
source.
• This unit shall be installed in accordance with the
requirements of NEC NFPA 70.
Loop Connection
One 25-pair termination block provides the
interconnect wiring for the access modules located in
slots 1 through 6 of the enclosure. Table 2 shows the
time slot assignment. The connections are terminated
by slipping the wire through the access holes and
pressing down the connectors (see Figure 5).
HDSL Connection
The HDSL signal and power are span connected to P2
and P3. This termination provides surge and
corrosion protection (see Figure 5).
HDSL Range Extender (HRE) Connection (Future)
The HDSL span can be extended by use of an HRE.
Two additional pairs are used and are termination to
P4 and P5. This termination provides surge and
corrosion protection (see Figure 5).
Bypass Pair Connection for MLT
A copper bypass pair can be used for MLT test access.
This pair is connected to termination P6. This
termination provides surge and corrosion protection
(see Figure 5).
Power Connection
There are no power terminations. All power is
derived from the HDSL span.
Timing Supply
There are no timing terminations. Timing is derived
from the HDSL span.
Office Alarms
There are no alarm terminations. All alarms are
carried to the central office via the HDSL (T-1)
overhead.
Carrier alarm condition such as a Red, Yellow, or
Blue (unframed all 1s) will be reported by the central
office equipment (Switch, Total Access 1500 or
TR008 carrier).
Installing cards
To install a Total Access 1000 RT card, grasp the unit
by the front panel while supporting the bottom side.
Align the card edges to the guide grooves and insert
the unit until the edge connector seats firmly into the
backplane. Lock the card in place by pushing in on the
locking lever.
61179001L1-5C Section 61179001L1-5, Issue 3 7
Figure 5. Total Access 1000 Component Layout and Cable Connections
12345
678910
11 12 13 14 15
16
6
11
16
21
7
12
17
22
8
13
18
23
9
14
19
24
10
2345
15
20
NC
17 18 19 20
21 22 23 24
8 Section 61179001L1-5, Issue 3 61179001L1-5C
Description
Indicates HDSL signal quality on Loop 1 is in one of the following five states:
Off ................. No synchronization of ICOT and HLIU on Loop 1
Red ................ Poor signal quality on Loop 1 (≥ 10
-7
BER)
Yellow ........... Marginal signal quality on Loop 1 (≤ 2 dB margin above 10
-7
BER)
Green ............ Good signal quality on Loop 1 (> 2 dB margin above 10
-7
BER)
Blinking ........ Detected error on either end of Loop 1
Indicates HDSL signal quality on Loop 2 is in one of the following five states:
Off ................. No synchronization of ICOT and HLIU on Loop 2
Red ................ Poor signal quality on Loop 2 (≥ 10
-7
BER)
Yellow ........... Marginal signal quality on Loop 2 (≤ 2 dB margin above 10
-7
BER)
Green ............ Good signal quality on Loop 2 (> 2 dB margin above 10
-7
BER)
Blinking ........ Detected error on either end of Loop 2
Table 3. Front Panel Indicators (HLIU)
Indicator
LOOP1 .........................
LOOP2 .........................
Table 4. Front Panel Indicators (BCU)
deLnoitidnoCnoitpircseD
krowteN
ffO
deR
wolleY
neerG
rewopoN
nwod1T(mraladeRnitinU
)detcennoctonro
raf(mralawolleYgnivieceR
)deRnitinudne
noitarepolamroN
tseT
wolleYtseTni1TkrowteN
Front Panel Indicators
Front Panel indicators are used on the common
modules and the access modules for the Total Access
1000 RT.
NOTE
If there is inactivity at the ADMIN port for two
minutes, all front panel indicators except those
on the PSU will turn off. Push the LED/ACO
button on the BCU to activate the front panel
indicators.
PSU Front Panel Indicators
The Total Access 1000 RT PSU front panel contains
two LED indicators. They are Power and Ring. The
Power LED is ON when the power is good to the
chassis. The Ring LED is on when Ring is selected
and okay. The front panel also contains a Ring
Disable switch. This switch allows for the ring
voltage to be enabled or disabled.
HLIU Front Panel Indicators
The Total Access 1000 RT HLIU front panel contains
two LED indicators. They are Loop 1 and Loop 2.
Table 3 gives the front panel indicator descriptions.
BCU Front Panel Indicators
The front panel network LED labeled NETWORK
provides status information for the network T1 using a
color coded message format. The front panel TEST
LED provides test status information for the network
T1 and access modules. See Table 4.
POTS Front Panel Indicators
After the initialization sequence, status of the analog
service for each customer loop is shown by four
(green) front panel LEDs. See Table 5 for
descriptions.
3. PROVISIONING
ADMIN Port
The ADMIN interface on the Total Access 1000 RT
BCU is used to change factory selected options and
obtain access module status through menus. To
access the menus, connect a VT100 terminal or
computer running a terminal emulation program to the
craft interface port using a standard male-to-female
RS-232, DB-9 cable.
Craft port settings are as follows:
• 9600 Baud
• No parity
• 8 Data bits
• 1 Stop bit
Table 5. Front Panel Indicators (POTS)
deLnoitidnoCnoitpircseD
YSUB
4dna,3,2,1
ffO
gnihsalF
NO
gnicneuqeS
kooHnO
gnigniR
)ysuB(kooHffO
elbaliavanUtolSemiT
61179001L1-5C Section 61179001L1-5, Issue 3 9
CAUTION
The BCU retains provisioning setup when
removed from the chassis. If inserted into another
chassis, the provisioning setup is invoked on
that chassis’ access modules.
Windows HyperTerminal
Windows HyperTerminal can be used as a VT100
terminal emulation program. Open HyperTerminal by
selecting PROGRAMS / ACCESSORIES /
HYPERTERMINAL. Refer to the Help section of
HyperTerminal for additional information.
NOTE
To ensure proper display background in
Windows HyperTerminal, select VT100 terminal
emulation under SETTINGS.
Password
Upon initial connection, the password option is
factory disabled. To enable the password, select Bank
Controller (1)/ Password Control (8) /Enable
Password (2). The factory default is PASSWORD in
all capital letters. The password can be changed to a
user-selected password if desired. If the password is
enabled, after approximately eight minutes of
keyboard inactivity, the terminal times out and returns
to the password login screen.
Menu Navigation
To traverse through the menus, select the desired entry
and press ENTER. To work backward in the menu
press the ESC (escape) key. See Figure 6 for the
Total Access 1000 RT menu tree.
Common Module Provisioning
Bank Controller
The ADMIN Port provides access to set up the Bank
Controller. Set up of the Bank Controller includes
Configuration, Provisioning, Statistics, Performance,
Time Slot Usage, Testing, Password Control, and
Uploading Code. The Configuration menu allows the
user to view general information about the unit
including unit name, part number, CLEI code, and
revision numbers. The Provisioning menu for the
BCU allows the user to provision the T1. The settings
include T1 framing, T1 count, and T1 CSU loopback.
The Statistics menu allows the user to view and reset
statistics. The Performance menu allows the user to
view the T1 performance for different time periods.
The Time Slot Usage menu allows the user to view the
assignment of time slots for the unit. This menu also
gives the user access to any menus that are available
for the particular access modules. The Test menu
allows the user to perform T1 loopbacks. The
loopbacks include line loopback, payload loopback,
far-end payload loopback (ESF mode), and near-end
payload loopback (ESF mode). The Password Control
menu allows the user to enable or disable a password
and to set the password. The Upload Code menu
allows the user to configure and upload new versions
of code for the unit.
Line Interface Unit
The ADMIN Port provides access to set up the Line
Interface Unit. Menus for the Line Interface Unit
include Configuration, Status, and Performance. The
Configuration menu allows the user to view general
information about the unit including unit name, part
number, CLEI code, and revision numbers. The
Status menu allows the user to view the status of the
unit. The Performance menu allows the user to view
the performance for the far and near-end loops over
different time intervals.
Signal Quality
ES 15M/24H Errored Seconds
1
SES 15M/24H Severely Errored Seconds
1
UAS 15M/24H Unavailable Seconds
1
The Status Menu shows the signal quality on the loops
as well as any loopback information and an indication
of pair reversal.
An indication of Pair Reversal (if present) is given at
the bottom of the first key column.
A measure of signal quality (current/minimum/
maximum) for each HDSL loop is displayed on the
Current System Status screen. The noise margin is the
measure in dB above the 10
-7
BER.
Predicting performance based upon signal quality
varies with each loop. Generally, a noise margin of 0
or higher will support a bit error rate (BER) of better
than 10
-7
. ADTRAN has defined the following as
guidelines that correspond to the Loop 1 and Loop 2
signal quality (margin) messages (1=XX and 2=XX).
1
The first number is for the current 15-minute period and the second is the current 24-hour period (Loop 1 and Loop 2 numbers are displayed).
10 Section 61179001L1-5, Issue 3 61179001L1-5C
Figure 6. Total Access 1000 RT Menu Tree
61179001L1-5C Section 61179001L1-5, Issue 3 11
Margin = 0 Poor Loop Quality
0
1
Margin
1
2 Marginal Loop Quality
3
1
Margin
1
20 Good Loop Quality
The Performance Menu displays 24-hour performance
data. At each 15-minute interval, the performance
information is transferred to the 15-minute
performance data register accessed from the
Performance History screen. This unit displays
performance information in 60-minute increments.
System Alarms
The ADMIN Port provides access to the System
Alarms menu. The status of visual and T1 alarms are
available at this menu. The menu also provides the
ringer status.
Provisioning Templates
The ADMIN Port provides access to templates that
automatically provision the unit. These include the
factory default template, TR-08 A-digroup, TR-08 B,
C, D-digroup, and ADTRAN Total Access 4303
Mode.
Access Module Provisioning
POTS
There are no hardware options on the Quad POTS
access module. The module has factory default
settings for each of the four analog interfaces on the
module. The ADMIN Port is used if any other settings
or provisioning options are desired. The factory
default setting for the QUAD POTS interfaces are as
follows:
• Loop start signaling
• Automatic loop provisioning enabled
The menus available through the ADMIN Port
provide access to Configuration, Provisioning, Status,
and Test options. The Configuration menu provides
information regarding the unit name, CLEI code, part
number, and software revision. The Provisioning
menu allows the user to select the operation mode,
transmit and receive attenuation, and 2-wire line
impedance, restore the default settings, and copy the
settings to other units. The Status menu allows the
user to view the settings for all four time slots that
were selected in the Provisioning menu. The Test
menu allows the user to initiate tests. The tests
include a digital loopback test, network on-hook/off-
hook test, customer ring test, and 1000 Hz DRS tone
generation test.
Signaling States
The following signaling states are supported:
• Loop Start
• Ground Start
• TR008 Signal Party
• TR008 Universal Voice Grade
• Tandem
• DPO
Automatic Loop Provisioning
The Quad POTS incorporates a feature that
automatically detects loop length and sets the
termination impedance and gain for transmit and
receive attenuation levels. This feature is enabled
from the factory and can be disabled through the craft
interface on the BCU.
For short loops, the termination impedance is set to
600 ohms + 2.16 uF and the gain is set to -6 dB for
transmit and -3 dB for receive attenuation levels. For
longer loops, the termination impedance is set to 900
ohms + 2.16 uF and the gain is set to -3 dB for
transmit and receive attenuation levels.
Setting Attenuation with Known TLP
For applications where input and output Transmission
Level Points are known, the transmit and receive
attenuation levels can be calculated to ensure optimum
VF characteristics. This is defined in AT&T
Publication 43801 which explains that the value of the
digital signal at reference point TLP0 should be equal
to 0 dBm0, or a digital milliwatt for optimum
performance (proper volume heard through the
telephone). See Figure 7 which displays the TLP
reference points (input, output, TLP0) and attenuation
parameters.
Figure 7. Circuit Path
0 to -9 dB
TLP0
TX Atten
T
R
0 dBm0
0 to -9 dB
0 to +9 dB
-9 to 0 dB
TLP0
RX Atten
0 dBm0
Transmit Path (To Backplane)
Receive Path (From Backplane)
Input TLP
Point
Output TLP
Point
1
The first number is for the current 15-minute period and the second is the current 24-hour period (Loop 1 and Loop 2 numbers are displayed).
12 Section 61179001L1-5, Issue 3 61179001L1-5C
Transmit Attenuation
Determine the input TLP. Then use the following
formula to calculate the amount of transmit
attenuation to add to the circuit:
TX Attenuation = Input TLP
Example: if an input TLP of 3 dB is to produce a level
of 0 dBm0 at TLP0, then the Transmit Attenuation
should be set to 3.0 dB.
Receive Attenuation
Determine the output TLP. Then use the following
formula to calculate the amount of receive attenuation
to add to the circuit:
RX Attenuation = Output TLP
Example: if 0 dBm0 at TLP0 is required to produce an
output TLP level of -3 dB, then the Receive
Attenuation should be set to 3.0 dB.
4. TESTING
HLIU
The Total Access 1000 RT HLIU provides diagnostic,
loopback, and signal monitoring capabilities.
HLIU Network Loopback
The HLIU responds to a loopback activation process.
The loopback position is a logic loopback located
within the HLIU internal HDSL transceiver. See
Figure 8.
Third, the Total Access 1000 RT HLIU responds to
T1 Network Interface Unit (NIU) loopback codes as
described in Bellcore TR-TSY-000312 if the HLIU is
optioned for NIU loopbacks. The NIU loopback
codes are as follows:
In-Band Codes ESF Codes
Loop Up 110000001 0010 1111 1111
Loop Down 111000010 0100 1111 1111
Receiving the in-band codes for more than five
seconds or the Extended Superframe (ESF) codes four
consecutive times will cause the appropriate loopback
action.
BCU
The Total Access 1000 RT BCU provides a variety of
test options for both the Network T1 and DS0 access
modules.
T1 Loopbacks
The Total Access 1000 RT supports several T1
loopbacks via the craft interface. These loopbacks
include:
• Initiating a remote payload or line loopback
command (ESF mode only).
• Responding to a remote payload or line loopback
command (ESF mode only).
• Responding to a remote CSU loopback
command.
Self-Test
The BCU goes into self-test when inserted into an
active Total Access 1000 RT chassis. The self-test
checks internal BCU circuitry. A failed test causes the
front panel Network LED to blink red.
POTS
Self-Test
A self-test is performed on the Quad POTS when it is
inserted into an active Total Access 1000 RT chassis.
The test verifies proper operation of critical circuits. If
the test is successful all four LEDs turn On in a
predefined sequence, the unit is placed in service, and
the LEDs then return to normal operation showing
current status of the POTS.
Initiated Tests
Other tests conducted on the Quad POTS are initiated
via the screen menus and VT100 terminal.
Digital Loopback Test
The Digital Loopback Test is used to loopback DS0
data coming from the network for each individual
First, loopback activation may be accomplished using
the control port of the ICOT. Refer to the ADTRAN
ICOT Installation and Maintenance practices
P/N 61179510L2 (220), P/N 6117911L2 (Total
Access 3000), and P/N 61179512L2 (3192) for more
information.
Second, the Total Access 1000 RT HLIU will respond
to the industry defacto HDSL loopback codes as
designated in the ANSI document T1E1.4/92. A
synopsis of the method described by ANSI is
presented in Appendix A.
Figure 8. HDSL Loopback
61179001L1-5C Section 61179001L1-5, Issue 3 13
channel. Received data is latched in on the appropriate
receive time slot on the receive bus. This data is then
placed on the transmit bus in the unit’s transmit time
slot.
Network On-hook / Off-hook Test
The Network On-hook / Off-hook test is used to test
signaling sent to the network by the unit. When
On-hook Test is selected, On-hook signaling is sent to
the network. When Off-hook Test is selected,
Off-hook signaling is sent to the Network. The
customer loop is forced On-hook while this test is
active.
Customer Ring Test
The Customer Ringing Test will activate the unit’s
ring relay in a 2-on / 4-off ring cadence, providing
ringing to the customer loop.
1000 Hz DRS Tone Generation Test
The 1000 Hz DRS (Digital Reference Signal) Tone
Generation Test is used to send DRS signal on the
receive path to the loop. The loop receive level that
should be received is determined by the following
equation:
Receive Level = 0 dB - Attenuation
5. HDSL DEPLOYMENT GUIDELINES
The ADTRAN HDSL system is designed to provide
DS1 based services over loops designed to comply
with carrier service area (CSA) guidelines. CSA
deployment guidelines are given below:
1. All loops are nonloaded only.
2. For loops with 26-AWG cable, the maximum
loop length including bridged tap lengths is 9 kft.
3. For loops with 24-AWG cable, the maximum
loop length including bridged tap lengths is
12 kft.
4. Any single bridged tap is limited to 2 kft.
5. Total bridged tap length is limited to 2.5 kft.
6. The total length of multigauge cable containing
26-AWG cable must not exceed the following:
12 - {(3*L
26
)/(9- L
BTAP
)} (in kft)
L
26
= Total length of 26-AWG cable
excluding bridged taps (in kft)
L
BTAP
= Total length of all bridged taps (in kft)
Table 6. HDSL Loss Values
(200 kHz cable loss in dB/kft at 135 Ω)
Cable Gauge
26
26
24
24
22
22
19
19
Cable Type
PIC
Pulp
PIC
Pulp
PIC
Pulp
PIC
Pulp
Temperature
68° 90° 120°
3.902 4.051 4.253
4.030 4.179 4.381
2.863 2.957 2.083
3.159 3.257 3.391
2.198 2.255 2.333
2.483 2.450 2.629
1.551 1.587 1.634
1.817 1.856 1.909
Figure 9. CSA Deployment Guidelines
This deployment criteria is summarized in the chart
shown in Figure 9.
Loop loss per kft for other wire is summarized in
Table 6.
14 Section 61179001L1-5, Issue 3 61179001L1-5C
Recommended maximum local loop loss information
for PIC cable at 70°F, 135 Ω resistive termination is
provided in Table 7.
Table 8. HLIU Troubleshooting Guide
Solution
1. Push the LED/ACO button on the BCU. If there is inactivity at the ADMIN port for 2
minutes, then all LEDS except those on the PSU will turn off.
2. Make sure the HLIU is properly seated in the housing.
3. Verify that the ICOT is delivering sufficient simplex voltage to the loops, if line powered.
The ICOT should apply approximately 130 VDC between loops on point-to-point circuits or
with only one HRE. Circuits with two HREs will apply a voltage of approximately -190
VDC between the loops. A minimum of approximately 65 V should be present between the
HDSL loops at the HLIU.
4. If Steps 1 and 2 pass, replace the HLIU.
1. Verify that the loop conforms with CSA guidelines (not too long, etc.).
2. Verify that the tip and ring of each HDSL loop belong to the same twisted pair.
3. Verify that loop loss at 200 kHz is not greater than 35.25 dB.
4. Verify that noise on both HDSL loops is within acceptable limits (see Section 5).
5. If Steps 1 through 4 pass and loop sync is still not available, replace the unit with one known
to be in proper working condition.
Condition
All front panel indicators are Off.
Power is present and adequate, but
loop sync is not available (LP1
and/or LP2 LEDs are Off).
Table 7. Loop Insertion Loss Data
Frequency Maximum Loss
(Hz) (dB)
3,000 .......................................... 12.00
10,000 ........................................ 15.00
50,000 ........................................ 25.50
100,000 ...................................... 30.00
150,000 ...................................... 32.75
196,000 ...................................... 35.00
200,000 ...................................... 35.25
250,000 ...................................... 37.50
300,000 ...................................... 42.00
An approximation for the maximum amount of
wideband noise on an HDSL local loop as measured
by a 50 kb filter is -31 dBrn.
An approximation for the maximum level of impulse
noise as measured using a 50 kb filter on an HDSL
loop is -50 dBrn.
NOTE
These approximations are to be used as guidelines
only and may vary slightly on different loops.
Adhering to the guidelines should produce
performance in excess of 10
-7
BER.
6. HLIU TROUBLESHOOTING PROCEDURES
Use Table 8 to troubleshoot the ADTRAN Total
Access HLIU.
Table 9. Specifications
latnemnorivnE
erutarepmetgnitarepO
erutarepmetegarotS
ytidimuHevitaleR
Cº56+otCº04-
Cº58+otCº04-
,mumixamtnecrep59otpU
gnisnednocnon
lacisyhP
snoisnemiDxH.ni7.41xW.ni7.21
D.ni5.5
rebmuNtraP0001sseccAlatoT
USP
UILH
UCB
STOP
ET1RBU
,1L7009711
22-1L70097116:diAboJ
,1L9009711
22-1L90097116:diAboJ
1L2109711
22-1L21097116:diAboJ
1L8049711
22-1L80497116:diAboJ
1L0209711
22-1L02097116:diAboJ
7. SPECIFICATIONS
The specifications for the Total Access 1000 RT can
be found in Table 9.
61179001L1-5C Section 61179001L1-5, Issue 3 15
8. ORDERING GUIDE
Table 10 provides needed information for ordering.
#traPnoitpircseDIELC
1L1009711TR0001sseccAlatoT__F0LK2MAV
1L7009711USP0001sseccAlatoT__C0EEUPAV
1L9009711UILH0001sseccAlatoT__C0ECJCAV
1L2109711UCB0001sseccAlatoT__G0SM2CAV
1L8049711STOP0001sseccAlatoT__GDTN2CAV
Table 10. Ordering Guide
9. MAINTENANCE
The Total Access 1000 RT Chassis does not require
maintenance for normal operation.
ADTRAN does not recommend that repairs be
attempted in the field. Repair services are obtained by
returning the defective unit to ADTRAN Customer
Service.
10. WARRANTY AND CUSTOMER SERVICE
ADTRAN will replace or repair this product within
the warranty period if it does not meet its published
specifications or fails while in service. Warranty
information can be found at
www.adtran.com/warranty.
U.S. and Canada customers can also receive a copy of
the warranty via ADTRAN’s toll-free faxback server
at 877-457-5007.
• Request Document 414 for the U.S. and Canada
Carrier Networks Equipment Warranty.
• Request Document 901 for the U.S. and Canada
Enterprise Networks Equipment Warranty.
Refer to the following subsections for sales, support,
CAPS requests, or further information.
ADTRAN Sales
Pricing/Availability:
800-827-0807
ADTRAN Technical Support
Pre-Sales Applications/Post-Sales Technical Assistance:
800-726-8663
Standard hours: Monday - Friday, 7 a.m. - 7 p.m. CST
Emergency hours: 7 days/week, 24 hours/day
ADTRAN Repair/CAPS
Return for Repair/Upgrade:
(256) 963-8722
Repair and Return Address
Contact Customer and Product Service (CAPS) prior
to returning equipment to ADTRAN.
ADTRAN, Inc.
CAPS Department
901 Explorer Boulevard
Huntsville, Alabama 35806-2807
16 Section 61179001L1-5, Issue 3 61179001L1-5C
61179001L1-5C Section 61179001L1-5, Issue 3 A-1
HDSL MAINTENANCE MODES
This Appendix describes operation of the HDSL
system with regard to detection of in-band and ESF
facility data link loopback codes.
Upon deactivation of a loopback, the HDSL system
will synchronize automatically.
Loopback Process Description
In general, the loopback process for the HDSL
system elements is modeled on the corresponding
DS1 system process. Specifically, the ICOT
loopback is similar to an Intelligent Office Repeater
loopback, and the HLIU loopbacks are similar to an
inline T1 Repeater loopback.
Appendix A
HDSL Loopbacks
In-band control code sequences are transmitted over
the DS1 link by either the insert or overwrite
method. The HDSL elements respond to either
method. The insert method produces periodic
control sequences that are not overwritten by the
DS1 framing bits. The overwrite method produces
periodic control sequences. However, once per
frame, the framing bit overwrites one of the bits in
the control sequence. The unit can detect the
loopback activation or deactivation code sequence
only if an error rate of 1E
-03
or better is present.
Loopback Control Codes
Control sequences are summarized in Table A-1
and Table A-2.
NOTE
In all control code sequences presented, the
in-band codes are shown with the left-most bit
transmitted first, and the ESF data link codes
with right-most bit transmitted first.
Table A-1. HDSL Loopback Control Codes
Source Code Name
(N) ................ 3in7 (1110000) ............. Loopback data from network toward network in the HTU-C.
(N) ................ 4in7 (1111000) ............. Loopback data from network toward network in the ICOT.
(N) ................ 2in6 (110000) ............... Loopback data from network toward network in first HRE.
(N) ................ 3in6 (111000) ............... Loopback data from network toward network in second HRE.
(C) ................. 6in7 (1111110) ............. Loopback data from customer toward customer in ICOT.
(C) ................. 5in7 (1111100) ............. Loopback data from customer toward customer in HLIU.
(C) ................. 4in6 (111100) ............... Loopback data from customer toward customer in first HRE.
(C) ................. 5in6 (111110) ............... Loopback data from customer toward customer in second HRE.
(N) ................ FF1E ............................. Loopback data from network toward network at ICOT.
(C) ................. 3F1E ............................. Loopback data from customer toward customer at ICOT.
(N) ................ FF04 ............................. Loopback data from network toward network at HRE1.
(N) ................ FF06 ............................. Loopback data from network toward network at HRE2.
(C) ................. 3F04 .............................. Loopback data from customer toward customer at HRE1.
(C) ................. 3F06 .............................. Loopback data from customer toward customer at HRE2.
(N) ................ FF02 ............................. Loopback data from network toward network at HLIU.
(C) ................. 3F02 .............................. Loopback data from customer toward customer at HLIU.
(C) ................. FF48 (ESF-DL) ............ Loopback data from customer toward customer at HLIU.
(N) ................ 1in6 (100000) ............... Loopback data from network toward network at HLIU.
(N) ................ FF48 (ESF-DL) ............ Loopback data from network toward network at HLIU.
(N/C) ............. 1in3 (100) ..................... Loopdown everything.
(N/C) ............. FF24 (ESF-DL) ............ Loopdown everything.
Type
Abbreviated
Wescom
The Source column indicates which side of the interface the control codes are sent from. For example, an (N) indicates a network sourced
code while a (C) indicates a customer sourced code.
All codes are in-band unless labeled ESF-DL
All codes listed above must be sent for a minimum of 5 seconds in order for them to be detected and acted upon.
A-2 Section 61179001L1-5, Issue 3 61179001L1-5C
Table A-2. In-Band Addressable Loopback Codes
Code and
Function Response
Arm ............................................... 11000 (also known as a 2-in-5 pattern)
The HLIU will loop up toward the network. No AIS or errors will be sent as a result of this loopback.
The ICOT and HRE will arm.
Disarm ........................................... 11100 (also known as a 3-in-5 pattern)
The ICOT and HRE are removed from the armed state. If any of the units are in loopback when the
11100 pattern is received, they will loop down. The LBK LEDs will turn off on all units.
ICOT Network Loop Up ............... D3D3 (1101 0011 1101 0011)
If the units have been armed and no units are in loopback*, the ICOT will loop up toward the
network, 2 seconds of AIS (all 1s) will be sent, 5 seconds of data will pass, and 231 bit errors will be
injected into the DSX-1 signal. As long as the pattern continues to be sent, 231 errors will be injected
every 20 seconds. When the pattern is removed, the unit will remain in loopback. If the pattern is
reinstated, the injection of 231 bit errors will resume at 20-second intervals.
Loop Down ................................... 9393 (1001 0011 1001 0011)
Any ICOT and HRE units currently in loopback toward the network will loop down and will retain
the armed state.
Query Loopback ............................ D5D5 (1101 0101 1101 0101)
If the units are armed and the ICOT, HRE, or HLIU are in network loopback, errors are injected into
the DSX-1 signal upon detection of the query loopback pattern. As long as the pattern continues to be
sent, errors are injected again every 20 seconds. The number of errors injected each time depends on
which unit is in loopback. If the ICOT is in network loopback, 231 errors are injected, 20 at a time if
the HLIU is in network loopback, 10 at a time if HRE #1 is in network loopback, and 200 at a time if
HRE #2 is in network loopback.
Loopback Time Out Override ........ D5D6 (1101 0101 1101 0110)
If the units are armed and this pattern is sent, the loopback time out will be disabled. The time out
option will be updated on the Provisioning menu of the HLIU (viewable through the RS-232 port) to
None. As long as the units remain armed, the time out will remain disabled. When the units are
disarmed, the loopback time out will return to the value it had before the D5D6 code was sent.
Note: All codes listed above must be sent for a minimum of 5 seconds in order for them to be detected and acted upon.
* If NIU is enabled, then the HLIU can be in network loopback when the ICOT or HRE loop up codes are sent.
-
1
-
2
-
3
-
4
-
5
-
6
-
7
-
8
-
9
-
10
-
11
-
12
-
13
-
14
-
15
-
16
-
17
-
18
The ADTRAN 1000 is a high-performance subscriber loop carrier system, designed to deliver voice services with up to 24 POTS channels from a 4-wire HDSL span. It supports both integrated and universal configurations, providing flexibility in deployment. The device features a compact and versatile platform with pole or wallmount options, making it suitable for various installation scenarios.
Ask a question and I''ll find the answer in the document
Finding information in a document is now easier with AI
Related papers
-
Adtron Total Access 1000 User manual
-
ADTRAN Network Card 1 User manual
-
ADTRAN Total Access 1500 Dual 4-Wire TO User manual
-
-
-
-
-
-
-
Other documents
-
ADC Campus RS Destop Unit User manual
-
Honeywell Krom Schroeder BCU 480 User manual
-
-
-
Greenheck Fan 55 User manual
-
Cotswold Outdoor CCT100x4-CDM-213SFx-255SFx User manual
-
Olivetti PG L26 and PG L26 Special User manual
-
-
-
