Tài liệu Product List pdf

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I. Product List
Product Listing
Description
Soneplex Loop Extender Access Modules
Central Office HDSL
Remote HDSL
Standard
Simplex power
Simplex power and idle code
Simplex power and local power
HDSL Repeater
Repeater Loop Extender (-130V)
Repeater Loop Extender Plus (+130V)
Quad Loop Extender
SC connectors
FC connectors
Quad Loop Extender - Short Range
SC connectors
FC connectors
Common Equipment
Soneplex Loop Extender Chassis - 23"
Soneplex Loop Extender Chassis - 19"
Main Processor Unit
Loop Extender Chassis Software
Alarm Processor Unit
Heat baffle/fiber management panel - 23"
Heaf baffle/fiber management panel - 19"
Common Equipment Kits
Soneplex Loop Extender Kit - 23"

Includes
:
1 – Soneplex Loop Extender Chassis - 23"
1 – Main Processor Unit
1 – Alarm Processor Unit
1 – Heat baffle/fiber management panel - 23"
Soneplex Loop Extender Kit - 19"
Includes
:
1 – Sonpelex Loop Extender Chassis - 19"
1 – Main Processor Unit
1 – Alarm Processor Unit
1 – Heat baffle/fiber management panel - 19"
Remote Chassis
Quad Loop Extender four position chassis
With RJ connectors
With wire-wrap connections
Quad Loop Extender two position chassis
With RJ connectors
Remote HDSL single position chassis
With wire-wrap and RJ connections
Remote HDSL two position chassis
With wire-wrap and RJ connections
Remote HDSL eight position chassis
No AC power
With AC power
AC/DC power supply for HWM1
Name
HLXC
HLXR

HLXR
HLXR
HLXR
HRX
RLX
RLX+
QLX
QLX
QLX
QLX
SPX
SPX
MPU
SWR
APU
BAFF
BAFF
FWM
FWM
FRMQ
HWM1
HWM2
HWM4
HWM4
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I. Product List
Product Listing
Description
Optional Equipment

Soneplex fan and filter assembly
LEC fan and fiber management
Front access panel
Plenum fiber management panel
Optional Equipment for Quad Loop Extender Chassis
Craft performance monitoring module
Line terminating unit
Power supply unit
One 110 VAC/-48 Vdc supply
Two redundant 110 VAC/-48 Vdc supplies
Power supply spare
23" rack mount bracket for four position QLX chassis
Battery back-up system (rectifier and 12.7 amp hour batteries)
24 Vdc Equipment for Quad Loop Extender Chassis
Quad Loop Extender-SC connectors
Craft performance monitoring module
Alarm processor unit
Name
FAN
FFM
FAP
PFM
CPM
LTU
PSU-1
PSU
PSU-S
-
-
QLX

CPM
APU
Refer to the Soneplex
®
Loop Extender Ordering Information (literature #476A) for complete
ordering information and catalog numbers. Contact your ADC Sales Representative or call
ADC Customer Service at 1-800-366-3891 to receive a copy of the most current ordering
information.
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II. Platform Introduction
Today, network planners face a dilemma. Since the future of standards and services
remains unclear, there is a healthy concern about investing in what may become
“deadend” technology. Still, networks must grow and change, both to provide current
revenue and to accommodate emerging services and markets, while competition and
deregulation add to the sense of urgency.
The penalty for delay is stagnation. On the other hand, choosing the wrong path wastes
current resources and blocks future growth. The Soneplex
®
Loop Access/Transport
Platform lets you build today, while preserving future options.
The Soneplex

platform offers a modular architecture which supports copper and fiber
optic transport facilities in point-to-point and point-to-multipoint topologies. In the
future, it will enable you to add a full range of broadband services and cost effectively
migrate to SONET, but the return on your investment begins immediately.
By integrating network interface, access, and management functions, the Soneplex
platform substantially reduces your required inventory. The Soneplex platform lets you
install the facilities which will earn you revenue today, and add new ones as demand –

and revenue potential – grows. The modular design makes change, such as upgrade
from asynchronous to synchronous interface, easy, often simply a matter of swapping
cards.
The Soneplex system also improves your return on costly, skilled human resources.
Preprovisioning is easy and cost effective, so turnup of services can be handled quickly,
inexpensively, and often remotely. The same is true of system administration and
maintenance. This, coupled with sophisticated self-test and notification capabilities,
gives you a critical edge as networks grow larger and more densely packed.
Most important, the Soneplex system keeps your options open. You can continue to use
existing infrastructure while you plan your future. Today’s HDSL or DS1 modules,
interfacing to copper, can operate side-by-side with optical DS2 modules interfacing
with fiber. An asynchronous DS3 network interface can be upgraded to SONET STS-1
with a simple change of plug-in modules. As your needs change, the Soneplex platform
will evolve with you. Growth and change become part of your strategic plan.
As networks are required to do more, cost less to operate, and perform more reliably, the
Soneplex system lets you build with confidence. The system accommodates a range of
asynchronous and SONET interfaces, DS3 and STS-1. Upgrade from copper to fiber can
be as simple as a change of modules.
Two basic Soneplex systems are designed to meet all of your loop access and transport
needs, from the central office to network hubs to large customer sites. The Soneplex
Loop Extender System distributes services from DS1 feeds. The Soneplex Broadband
System lets you distribute services from DS3 or STS-1 high bit-rate interfaces.
The intelligence built into the Soneplex system lets it take an active part in network
management. The system provides simple, flexible access to the network for remote
testing, and monitors many aspect of the network measuring user-defined parameters
and sending alarms, or even rerouting traffic when error-rate thresholds are exceeded.
These capabilities can substantially reduce, or even eliminate, many of today’s costs of
service initiation or system maintenance.
Introduction
Soneplex System

Makes Sophistication
Simple
Financially Sound
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The Soneplex system’s high-density, multifunction design combines the functions of a
variety of network elements: multiplexers, DSX bays, office repeaters, fiber optic exten-
sion shelves and monitoring devices. It simplifies installation and saves valuable space.
Each chassis is made up of three primary sections: one for network interface, another for
service distribution, and a third for network management and maintenance.
The network interface section of the Soneplex Loop Extender System accepts up to 28
DS1 inputs per chassis. The high-speed network interface section of the Soneplex
Broadband System accepts DS3 inputs and eliminates the need for external M13
multiplexers. It also supports STS-1 synchronous electrical input – an inexpensive form
of connection to collocated equipment – performs VT mapping, and has time-slot
assignment capability.
The service distribution section of the system supports up to 28 modules for delivery of
DS1 hicap service over conditioned or unconditioned copper or fiber facilities. High bit-
rate digital subscriber line (HDSL) modules perform 2B1Q conversions for transport of
hicaps over non repeater-equipped copper. Optical DS2 modules convert electrical
signals to optical, transporting 4 DS1 signals over a DS2 fiber link.
The management and maintenance section consists of a main processor unit (MPU) and
an alarm processor unit (APU). The system supports TBOS and TL1 interfaces for
remote connection to an operations support system (OSS). It also supports an easy-to-
use, menu-driven craft interface, and X.25 and alarm contact closure interfaces.
HDSL signal transport allows local exchange carriers to continue to earn revenue from
existing copper infrastructure. Each HDSL module allows one DS1 signal to be trans-
ported up to 12,000 feet over copper without the use of line repeaters, bridge taps, or
cable pair separation. The addition of an HDSL repeater doubles the effective delivery
distance to 24,000 feet.

HDSL compensates for gauge changes, and tolerates the presence of near-end crosstalk.
RLX modules in the chassis will extend DS1, and power up to 10 span repeaters on a
single unconditioned copper circuit. Each 19" shelf supports 20 modules. The standard
Soneplex shelf supports up to 28 modules serving as many as 28 customer sites.
For fiber transport, optical DS2 modules can operate side-by-side with HDSL cards. Up
to seven customer sites can be supported by each Soneplex chassis. One optical module
per site provides unprotected 6.3 Mbps service (4 DS1s). Two modules per site provide
1+1 protection.
The combination of HDSL and optical DS2 modules provide: T1 hicaps, T1 transport of
digital loop carrier, T1 video using the latest compression techniques, fractional T1, and
cell-site connection for cellular telephony transmission.
The system’s remote OSS interface and onboard management capabilities make it ideal
for unstaffed sites or operations with limited staffing capabilities. Remote provisioning
and monitoring simplify setup and routing maintenance demands.
Realtime and historical performance monitoring, and remote loopback and bit-error
testing greatly reduce the demands on technical support personnel.
System Design and
Capabilities
II. Platform Introduction
Soneplex System
Application and
Operation
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II. Platform Introduction
• A variety of plug-in network interfaces give you flexibility today, and a clear
migration path to SONET.
• A range of customer interfaces let you use existing copper infrastructure, and
upgrade easily to fiber.
• The Soneplex system is compatible with current operations support systems, for

ease of conversion.
• Remote operation and support capability reduces downtime and maintenance cost.
• Embedded X.25 interface supports up to three switched, virtual circuits, and
eliminates the need for an external packet assembler/disassembler (PAD).
• High density design saves floor and rack space, and makes Soneplex ideal for hut
or cabinet installations.
• Improved cable management, organizing both copper and fiber, saves space and
simplifies management and repair.
• Full-time performance monitoring allows proactive repair, reducing customer
impact and loss of revenue.
• Remote monitoring and alarms allow centralized trouble shooting for better use
of personnel and improved response.
• Housekeeping alarm transport eliminates the cost of separate fire and tamper
alarm reporting systems.
• Remote DS1 loop back for single-ended testing of each DS1 reduced both failure
and repair cost.
The Soneplex Intelligent DS1 Service Delivery Platform supports your existing infra-
structure while positioning you for a competitive future. Rather than painful choices
based on technology, you are freed to make simple, rational decisions based on market
demand. Implement what your customers are willing to pay for, and build new infra-
structure as revenues allow.
Instead of placing new burdens on personnel, the Soneplex platform lets them offload
time consuming chores to the system itself. Technicians acclimate quickly, using
familiar existing support systems, and accessing large areas of the network remotely.
As technology and the network grow and change, the Soneplex platform adapts quickly
and easily. Today’s rebuild becomes tomorrow’s card swap. Migration to fiber, SONET,
and new support systems becomes easy and economical. The Soneplex platform solves
the network planning dilemma.
Soneplex Platform:
Focus on Function

Soneplex Platform in
Summary
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III. System Introduction
The Soneplex Loop Extender system is a flexible, cost-effective platform providing DS1
services in point-to-point or point-to-multipoint applications. To meet the short turn-up
intervals that exist in today’s competitive market, different DS1 modules can be mixed
within the chassis to match the transport facilities already in place. These modules
include the Quad Loop Extender (QLX), the High bit-rate Digital Subscriber Line
Module (HLX) and the Repeater Loop Extender Module (RLX).
The Soneplex Loop Extender system accepts a standard electrical DS1 signal on the
network side and can be used in a stand-alone configuration or with any multiplexer or
network element that generates a standard DS1 signal. The standard Soneplex Loop
Extender system consists of a 23 inch rack mount chassis housing up to 28 modules
which extend up to 28 DS1 circuits over either copper or fiber. A main processor unit
(MPU) provides the interface from the transmission modules to the operation support
system (OSS). An alarm processor unit (APU) provides a critical/major/minor contact
closure appearance to the telemetry alarm system (TAS), as well as housekeeping alarm
inputs.
A 19 inch rack mount version of the Soneplex Loop Extender chassis has been developed
which supports up to 20 DS1 service modules as well as the MPU and APU.
DS1 transport schemes employed by the Soneplex Loop Extender system include:
• High bit-rate digital subscriber line (HDSL): The HLX modules perform a DS1/HDSL
2B1Q signal conversion to transport hicaps up to 12 kft over two unconditioned copper
pairs. An inline HDSL repeater may be deployed to double the transmission distance up
to 24 kft.
• Repeatered DS1s: The RLX modules transport repeatered DS1 signals over copper
facilities.
• Quad Loop Extender: The QLX modules perform electrical/optical conversions,

allowing up to four DS1 circuits per card to be transmitted over either a 1+1 protected
or unprotected fiber optic link.
Introduction
Description
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X
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TBOS
EIA-232
EIA-422
DS1
(3000' BETWEEN SPAN REPEATERS)
OPTICAL BUDGET UP TO 20 MILES
CUSTOMER PREMISES
REMOTE WALL MOUNT CHASSIS
UP TO FOUR QLXs PER CHASSIS
CUSTOMER PREMISES
REMOTE RACK MOUNT
OR WALL MOUNT CHASSIS
400 STYLE MOUNTING UP TO 8 HLXR
CENTRAL OFFICE
LOCAL CRAFT INTERFACE
CUSTOMER PREMISES
CUSTOMER PREMISES
REMOTE ONE OR TWO POSITION
WALL MOUNT CHASSIS
DISTRIBUTION
LOOP (12 KFT)
X.25
TOTAL DISTRIBUTION
HDSL LOOP
(24 KFT)
HRX
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Operations
III. System Introduction
The Soneplex Loop Extender system provides a variety of interfaces for interconnection
into office alarm systems and operations centers. At the heart of this operations feature
set is the direct TL1 connection to the X.25 network. This connection is accomplished
via a synchronous output from a EIA-232 port controlled by the MPU. This port elimi-
nates the need for an intermediate Packet Assembler/Disassembler (PAD).
The rear of the Soneplex Loop Extender chassis has three serial interface ports. Port 1
supports an EIA-422 telemetry byte oriented serial (TBOS) protocol interface. Port 2 is a
serial EIA-232 25-pin D subminiature connector that supports either craft interface or
TL1 commands. Port 3 is also a serial EIA-232 25-pin D subminiature connector that
can support three logical connections over one X.25 connection. These logical connec-
tions can be in the form of either permanent virtual circuits (PVCs) or switched virtual
circuits (SVCs). The virtual circuits can be configured for craft interface or TL1
commands.
The Soneplex Loop Extender system stores all revision level information to allow local
or remote inventory via the craft interface terminal or remotely through dial-up access
or X.25. Software upgrades to all elements of the Soneplex Loop Extender system are
performed through a download procedure, which may be accomplished locally through
the craft interface or remotely through dial-up access.
For external back-up protection, the system can upload and download from the MPU its
specific configuration database. This operation is effected from a PC using a standard file
transfer program with the configuration stored in a disk file. The download procedure of
the database will be similar to the MPU software download.
MPU-specific administrative and provisioning information is retained on the D1 HLXC
module for database and restoral purposes. Therefore, if MPU replacement is necessary,
no external data transfer or back-up protection is required.
Today's service providers want to be alerted to potential service outages before the
problem manifests itself. Through full-time DS1 performance monitoring, the Soneplex
Loop Extender system provides unparalleled insight into the actual service level deliv-

ered to the customer. Extensive maintenance features are provided by the Soneplex
common equipment and the service plugs themselves. Trouble isolation and
sectionalization is accomplished through loop backs. Front panel indications, along with
visual and audible alarms, provide local notification of critical, major and minor alarms
as well as other maintenance conditions.
User access is provided through VT100 emulation, using any personal computer or
laptop computer terminal. This capability is available remotely through dial-up access.
Protection switching architecture is employed on any service affecting interface carrying
multiple DS1s. The high speed interfaces are all protected 1+1, as are the optical low
speed interfaces.
Administration
Maintenance
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III. System Introduction
All provisioning is performed locally or remotely through the craft interface. Depending
on the service delivered, a minimum number of options must be set for enabling the
circuit. Provisioning information is stored in non-volatile memory, and is maintained in
the MPU even during power down conditions. Each module also retains its own provi-
sioning information in case the MPU itself needs to be removed and replaced. The new
MPU is then updated automatically by each module in the Soneplex Loop Extender.
A standard TL1 message set is supported through logical channels in the X.25 link.
Customer circuits may be enabled, disabled, reprovisioned, looped for trouble isolation
or interrogated for performance information via this link.
Provisioning
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T1
SPAN LINE
CUSTOMER

PREMISES A
1 DS1
HDSL

2B1Q
1 DS1
CUSTOMER
PREMISES B
HLXR
CUSTOMER
PREMISES C
QLX
OPTICAL DS2
1-4 DS1s
QLX
•
•
•
CENTRAL OFFICE /
CEV / HUT / CABINET
NETWORK
INTERFACE
•
•
•
1
28
DS1s
SONEPLEX LOOP 
EXTENDER CHASSIS

III. System Introduction – Applications
Hubbing
Point-to-Multipoint
Each Soneplex Loop Extender system can be configured to hub repeatered DS1s, optical
DS2s and DS1 circuits using HDSL 2B1Q technology. The network interface to each
chassis is 28 electrical DS1s. DS1 distribution requirements may vary for each Loop
Extender system. In the hubbing example shown here, three different transmission
schemes provide DS1 service to three different customers:
• Customer A is fed a repeatered DS1 over copper.
• Customer B is fed a DS1 using high bit-rate digital
subscriber line transmission technology.
• Customer C is fed up to four DS1s over a protected
fiber link.
In a second OSP application, DS1 hicap services are
hubbed from a cabinet. One or more Soneplex Loop
Extender chassis can be mounted in the cabinet for
DS1 distribution using fiber or copper facilities.
In this outside plant (OSP) application, DLC
cabinets are fed with protected or unprotected
optical DS2s, repeatered DS1s or DS1s using
HDSL transmission technology.
Outside Plant Cabinet
CABINET
SPAN LINE
CUSTOMER
PREMISES A
1 DS1
1 DS1
CUSTOMER
PREMISES C

1-4 DS1s
QLX
•
•
•
OPTICAL DS2
T1
HDSL
2B1Q
HLXR
SONEPLEX LOOP
EXTENDER CHASSIS
CUSTOMER
PREMISES B
CABINET A
SUBSCRIBERS
OPTICAL DS2
SONEPLEX LOOP
EXTENDER CHASSIS
OUTSIDE PLANT CABINET
•
•
•
1
28
DS1s
DLC
CABINET B
DLC
T1

QLX
SUBSCRIBERS
CABINET A
DLC
HLXR
SUBSCRIBERS
HDSL
2B1Q
NETWORK
INTERFACE
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Building Riser
The Soneplex Loop Extender system can also be used
in high rise building applications to distribute hicap
DS1s to various floors utilizing the physical transport
media available, either copper or fiber optical riser
cable. The Soneplex Loop Extender chassis is located
in the basement or a closet of the building, feeding
one or more customers within the building.
OFFICE BUILDING
•
•
•
NID
MUX
28 DS1s
1-4 DS1s
QLX
HLXR

SONEPLEX
LOOP EXTENDER
CHASSIS
REPEATERED DS1
III. System Introduction – Applications
The Soneplex Loop Ex-
tender system is ideal for
thin route T1 applications
which feed cellular trans-
port sites. As the personal
communication system
(PCS) market expands, the
requirement to establish
cell sites and initiate
service quickly is essential.
Most sites will require one
to two T1 lines. The
Soneplex Loop Extender
platform is ideal for this
application regardless of
whether the transport
medium is copper or fiber.
Cellular Site Feed
CELLULAR
SITE
OPTICAL DS2
24V POWER SUPPLY
SONEPLEX LOOP
EXTENDER CHASSIS
CENTRAL OFFICE/

CEV/HUT/CABINET
•
•
•
1
28
DS1s
BTS
CABINET A
HLXR
BTS
CABINET B
HLXR
HRX
HLXR
QLX
QLX
HDSL
2B1Q
NETWORK
INTERFACE
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IV. Modules – Access
Quad Loop Extender Module
Low speed optical interface converts four DS1 signals into an optical DS2
for delivery over a pair of singlemode fibers. A QLX is used at the customer
premises to convert the optical DS2 back to four DS1s. 1+1 protection is an option. The
QLX provides BER threshold protection switching, far end alarm visibility and far end
housekeeping alarms.

HDSL Central Office Module
The HLXC supports one DS1 per module and provides conversion from
DS1 electrical format to HDSL format (2B1Q), continuous monitoring on
HDSL loops, and -130 Vdc simplex power (
+130 Vdc if an HDSL repeater is present) to
remote HDSL module (HLXR). The module allows full duplex transmission up to
12,000' over two unconditioned copper pairs. The HLXC provides far-end alarm visibility
and full performance monitoring. It also performs DS0 channel blocking.
HDSL Remote Modules
The remote HDSL module supports one DS1 per module, operates on line
power from the HLXC and specific models provide a -48 Vdc local power
option. It can be optioned to operate as an NID. The HLXR provides a 1.544 Mbps DSX-1
interface toward the customer (ANSI T1.403-1990). The HLXR will recognize and
activate on in-band loop back codes.
HDSL Repeater Module
The HDSL repeater module supports one DS1 per module and operates on
+130 volt line power from the HLXC. The HDSL repeater extends the
HDSL technology beyond the Carrier Serving Area to a maximum distance of 24 kft.
Repeater Loop Extender Module
The RLX supports one DS1 per module and can be optioned as an auto-
matic span power repeater (ASPR) or as a DS1 interface to a DSX. The
RLX provides full performance monitoring and performs DS0 channel blocking.
QLX
Description
HLXC
HLXR
HRX
RLX
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IV. Modules – Access
Quad Loop
Extender Module
Description
The Quad Loop Extender (QLX) module multiplexes up to
four DS1 signals for simultaneous two way (full duplex)
transport over two singlemode optical fibers, for distances
up to approximately 20 miles. The system can be config-
ured for either unprotected or 1+1 protection. In the
unprotected configuration, two modules are deployed:
one at the CO and one at the CPE. In the protected
configuration, four modules are deployed: two at the CO
and two at the CPE. Up to seven protected or unprotected
systems can fit into the Soneplex Loop Extender chassis.
QLX Module
STATUS
REMOTE
DS1 STATUS
1234
ENABLE
R = FAULT
G = O.K.
FLASH = LPBK
OFF = UNEQPP
DS1 ONLINE
G = ONLINE
R = LINE LOCK
OFF = OFF
LINE
RESET

LMPTST/
APS
OPT
APS
FAIL
BER
LOCKOUT
FORCE
1 - 4 DS1s
CO/CEV/HUT CUSTOMER PREMISES
1 - 4 DS1s
Q
L
X
Q
L
X
Q
L
X
Q
L
X
1300 NM
22 DB LINK BUDGET
PM INFORMATION TO MPU
UNPROTECTED
SYSTEM
ADD FOR 1+1
PROTECTED SYSTEM

Each DS1 circuit can be provisioned for either AMI or B8ZS. The two line codes can be
intermixed on the same module.
Two levels of performance based alarms (BER) are software selectable. The BER switch-
ing range can be selected from 10
-4
to 10
-10
for major alarm/protection switch; minor
alarm notification is selectable from 10
-6
to 10
-10
. The QLX module in conjunction with
the craft/performance monitoring module (CPM) monitors, collects and reports DS1
line and path performance to the embedded operations support. The main processor
unit provides the interface to an operation support system (OSS).
The Short Range QLX module offers identical performance and functionality features
with a reduced optical budget of 10.5 dB. This unit offers an economical solution for
optical DS2 transport for distances up to 5 miles.
Other features of the QLX modules include:
• Compatible with the B3, C3 and D3 versions of ADC’s Quad Fiber Loop Converters
and ODS2 modules
• DS1 interface line build out
• Path or line protection switching with the craft/performance monitoring unit
• Alarm reporting of various alarms as major, minor or remote with the Alarm
Processor Unit
• The QLX is transparent to frame formats
• Remote far end alarms visibility
• Extended temperature
• Remote loop backs

• Short Range version (10.5 dB optical budget)
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IV. Modules – Access
The QLX can operate in either protect or unprotect modes. In both modes, all four DS1s
are recovered from the optical link and will be delivered to the customer access point.
In a protected link, the QLX can be optioned, through software commands, for either
line or path protection switching. Line protection switching refers to group-switching
all four DS1s from the working to the protect modules. Path protection switching
involves evaluating each DS1 on an individual basis and switching individual DS1s
between two QLX modules. Therefore, one QLX module could deliver from one to four
DS1 signals to the customer, with the remaining signals provided by the second QLX
module in the protected link.
For path protection switching to be active, a craft performance monitoring module
(CPM) must be installed in the CPE chassis. At the CPE location, the recovered DS1
signals are routed to the CPM for evaluation and the best signal of each pair is chosen to
be delivered to the customer.
Individual DS1 circuits can be looped back remotely.
Initiating a command from the craft interface to
loop back a remote DS1 signal sends a proprietary
loop back command over the fiber to the far end,
looping back that DS1 to the network and sending an
AIS signal to the customer.
The QLX system can be used to transport a variety of services up to the DS1 rate,
including:
• Private DS1 lines
• Switched DS1
• Compressed video
• ISDN Primary Rate Access
• LAN interconnections

• Switched Multimegabit Data Service (SMDS)
QLX Module
Protection Switching
OUT
IN
Q
L
X
LTU
QLX FOUR POSITION CHASSIS
Loopback
Applications
4
1.544 Mbps ± 200 bps
AMI or B8ZS
SF, ESF, SLC96 and unframed
9/125 µm singlemode
2
4
1310 nm
22 dB
20 miles (average)
FC, SC
-42.5 Vdc to -56.5 Vdc
-48 Vdc or 110 VAC
6 watts typical per QLX module
-40
o
C to 65
o

C
4.385" H x 1.375" W x 9.155" D (11.14 x 3.49 x 23.25 cm)
DS1/System:
DS1 Line Rate:
DS1 Line Code:
DS1 Frame Formats:
Fiber:
Fiber – Unprotected System:
Fiber – Protected System:
Wavelength:
Optical Budget:
Transmission Distance:
Fiber Connector:
CO Chassis:
Remote Chassis:
Power Consumption:
Operating Temperature:
Dimensions:
Standard QLX
Specifications
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IV. Modules – Access
Short Range QLX
Specifications
A majority of cellular sites are being constructed with 24 Vdc sources as the primary
power supply. The requirement to feed this growing application over a fiber network
demands a system which could operate with a 24 Vdc power feed. Unique QLX, CPM and
APU modules have been developed, which can be deployed in the QLX chassis and
powered by 24 Vdc. The system functionality and performance features are identical to

the standard QLX platform.
24 Vdc QLX Remote
Platform
Specifications
+20.0 to +30.0 Vdc
220 mA typical @ +24V
250 mA max @ +24V
380 mA max @ +20V
180 mA max @ +24V
Supply Voltage:
QLX Supply Current:
APU Input Current:
CPM Input Current:
The 24 Vdc QLX platform specifications are identical to the standard QLX module except
where identified below:
24 Vdc QLX
Remote Platform
4
1.544 Mbps ± 200 bps
AMI or B8ZS
SF, ESF, SLCC 96 and unframed
9/125 µm singlemode
2
4
1310 nm
10.5 dB
5 miles (maximum)
FC, SC
DS1/System:
DS1 Line Rate:

DS1 Line Code:
DS1 Frame Formats:
Fiber:
Fiber – Unprotected System:
Fiber – Protected System:
Wavelength:
Optical Budget:
Transmission Distance:
Fiber Connector:
15 6/96
476
IV. Modules – Access
HDSL
Description
HLXR HLXC
ADC’s High bit-rate Digital Subscriber Line
(HDSL) module provides full duplex DS1 trans-
mission over two unconditioned, non-loaded
copper loops up to 12 kft, meeting Carrier
Serving Area (CSA) guidelines. Each of the two
wire pairs carries one half of the net payload plus
system overhead. Each pair carries 784 Kbps in
both directions simultaneously.
HDSL Loop
HLXC HLXR
UNCONDITIONED LINE
12,000'
392 KBAUD (784 KBPS)
USING 2B1Q LINE CODE
LOOP 1

LOOP 2
DS1
ANSI
T1.403
T1.408
INTERFACE
DS1
An HDSL repeater may be added to the HDSL
span to double the transmission distance to a
maximum of 24 kft.
The central office HDSL module (HLXC) performs data translation between the bi-polar
DS1 signal and the HDSL 2B1Q line code. The HLXC monitors, collects and reports DS1
and HDSL line and path performance to the main processor unit which in turn provides
the interface to an operation support system (OSS). The HLXC also communicates with
the remote HDSL module (HLXR) via the HDSL embedded operation channel (EOC)
which is defined as part of the HDSL frame structure in Bellcore’s FA-NWT-001211
Network Operations Framework Generic Requirements for HDSL.
The remote HLXR module performs data translation between the customer side bipolar
DS1 signal and the facility HDSL 2B1Q line code. The HLXR customer side interface is
per ANSI T1.403. The DS1 line performance is monitored by the HLXR and reported to
the HLXC via the EOC. OSS information from the HLXR can be obtained through the
craft interface on the HLXR front panel or the MPU located at the CO.
Four unique versions of the HLXR offer incremental feature enhancements directed at
specific customer requirements. All units are packaged for single slot deployment in
400 style chassis and possess a craft interface on the front panel for circuit monitoring
and provisioning. All systems provide span power capability.
• D4 HLXR (Standard)
• D3 HLXR
- Simplex power for CSU or NID
• D2 HLXR

- Simplex power for CSU or NID
- Idle code generator (as specified in ANSI T1.403-1995)
• D1 HLXR
- Simplex power for CSU or NID
- Local power
HLX
LPBK
STATUS
V -
I-
I+
V+
L1
L2
HDSL
RMT/
HSKP
LOSW
BER
LOSW
BER
DS1
LOS
BER
CONT
SNR
RESET
CLEI
EQUIP NET
MON

LOOPBACK
DISPLY CO
I V
ALM
OUT
IN
CO
HSKP
LOS
BER
DS1HDSLL1L2
LOSW
BER
SNR
STATUS
HLXR
LOSW
BER
LPBK
–
+
R
S
2
3
2
16 6/96
476
Other features of the HDSL module include:
• Full and fractional DS1 (individual DS0 blocking)

• HLXR integrated NID that responds to in-band framed or unframed loop back codes,
DS1 ESF facility data link loop codes and manual loop back control
• Remote alarm indicators
• Automatic line code and frame format operation
• Continuous real time monitoring of Signal-to-Noise-Ratio and Pulse Attenuation
parameters on each loop
• Performance monitoring capabilities per ANSI T1.403
• Access to ESF path performance monitoring statistics (non-intrusive monitoring)
• Alarm reporting via dry relay contacts, TBOS, TL1, craft and X.25 interfaces via the
MPU interface
• Current and voltage test points for measuring the loop power
• Insensitive to tip/ring and loop swapping
• Channel blocking code utilizing an 8-bit programmable value
• Loopback acknowledgment signature for programmable loopback
• DS1 simplex power capable of powering CSU at 60 milliamps
• Backwards system compatibility with C1 HLXC or B1 HLXR with reduced feature set
which match the earlier functionality
• Programmable loopback expanded to HLXC recognizes 16-bit codes in DS1 framed or
unframed format. When framed, the codes are recognized in either frame bit over
write or frame bit insert mode.
IV. Modules – Access
HDSL
Specifications
DS1/System:
DS1 Line Rate:
DS1 Line Code:
DS1 Frame Formats:
HDSL Loop Rate:
HDSL Line Code:
HDSL Loop Character:

CO Chassis:
Remote Chassis:
Loop Power:
Power Consumption:
Operating Temperature:
HLXC
System Compatibility:
Dimensions:
Weight:
HLXR
System Compatibility:
Dimensions:
Weight:
1
1.544 Mbps ± 200 bps
AMI or B8ZS
SF, ESF, SLC96 and unframed
784 Kbps dual duplex transmission
2B1Q (two binary, one quaternary)
Non-loaded copper pairs, repeaterless transmission up to 12
Kft on 22 or 24 AWG or 9 Kft on 26 AWG including bridge
taps; mixed gauge cables allowed; loop lengths may differ
up to 3,300'
-42.5 Vdc to -56.5 Vdc
Loop power, -48 Vdc
-130 Vdc for HLXR
+130 Vdc for HDSL repeater and HLXR
See power table on page 38
-40
o

C to 65
o
C
Soneplex Broadband and Loop Extender Chassis
4.625" H x .6875" W x 9.75" D (11.75 x 1.75 x 24.76 cm)
.913 lbs (.415 kg)
400 Style mechanics chassis
5.6" H x 1.4" W x 6.0" D (14.2 x 3.6 x 15.2 cm)
1.2 lbs (.55 kg)
17 6/96
476
IV. Modules - Access
The HDSL repeater will reside between the HLXC and
HLXR. Two separate HDSL facility segments
will be created; the first between the
central office and the repeater, and the
second between the repeater and the
remote site.
Each of the two HDSL segments in the
repeater application will be capable of reach-
ing up to a full CSA distance. This results in a
maximum reach of 24 kft, or 12 kft per segment. The
HDSL repeater should be deployed near mid-span in the
outside plant environment using a 239-type apparatus case
with double-wide slots. Only one HDSL repeater may be deployed
along an HDSL trasmission path.
HRX
HDSL REPEATER
CAUTION
USE OF ELECTRICAL

SHOCK. VOLTAGES UP TO 260
VOLTS MAY BE PRESENT ON TELE-
COMMUNICATIONS CIRCUITS.
YELLOW SELFTEST
FLASHING GREEN PERFORMING ACTIVATION
GREEN ALL LOOPS ACTIVE
RED EQUIPMENT FAILURE
1 GND
2 NC
3 LOOP 1 RING
4 LOOP 1 TIP
5 LOOP 1 RING
6 LOOP 1 TIP
7 NC
8 LOOP 2 RING
9 LOOP 2 TIP
10 NC
11 LOOP 2 RING
12 LOOP 2 TIP
CUSTOMER
NETWORK
NETWORK
CUSTOMER
HDSL Repeater
Description
HRX Repeater
Specifications
HDSL Interface
Output Signal Level:
Impedance:

Loop Loss Allowed:
Power
Nominal Input Voltage:
Maximum Power
Consumption:
System Compatibility:
Dimensions:
Weight:
Temperature
Operating
Inside the Case:
Outside the Case:
Storage
Relative Humidity:
Operating and Storage:
13.5
+0.5 dBm
135 Ω
Up to 35 dB; HLXC to HRX and HRX to HLXR
Up to
+130 Vdc
6.2 Watts; all power dissipated in the unit.
239 mechanics apparatus case
6.67" x 2.63" x 1.4"
1.0 lb.
-40° to 149° F (-40° to 65° C); Ambient temperature
inside the apparatus case.
-40° to 122° F (-40° to 50° C); Ambient temperature
outside the apparatus case.
-40° to 158° F (-40° to 70° C); No condensation

5% to 95%
Telco Facility Carrier Serving Area
Network
Interface
Central Office
Chassis
Outside Plant
Apparatus Case
Up to 12kft Up to 12kft
Remote End
Chassis
D1
HLXC
HDSL
Repeater
HDSL HDSL
Version D
HLXR
Customer
Premises
DS1 DS1
18 6/96
476
HDSL Transmission
Facility Requirements
][
(3 x L26)
9 – LBTAP
IV. Modules – Access
The HDSL module provides full duplex transmission over two unconditioned, non-

loaded copper loops. This can be done without standard T1 repeaters and without
removing bridge taps or other conditioning of the cable, as long as the loops meet the
Carrier Serving Area (CSA) guidelines. CSA rules describe the length and make-up of
such loops:
• No load coils are present in the loops.
• For 26 AWG cable (used alone or in combination with other gauge cables) the
maximum allowable loop length, including bridge taps, is 9 Kft.
• If all cable is coarser than 26 AWG cable, the maximum allowable length, including
bridge taps, is 12 Kft.
• An HDSL repeater may be added to the HDSL span to double the transmission
distance to a maximum of 24 Kft.
• Any single bridged tap is limited to 2 Kft maximum length and the total length of all
bridge taps is limited to 2.5 Kft maximum length.
• The total length of multi-gauge cable containing 26-gauge cable must not exceed:

12 – Kft
where L26 = total length of 26 AWG cable excluding bridge tap; and LBTAP = total
length of all bridge taps.
In addition to the outside plant CSA loops, planning for an HDSL system should also
take into account the central office wiring. In some installations, the drop and customer
premises wiring may have to be included as part of the network. The HDSL loop limits
for a variety of cable gauges are summarized in the table below. For detailed information
about CSA design guidelines, refer to Bellcore TA-NWT-001210.
OHMS @
MAXIMUM
LOOP LENGTH
750
638
520
367

MAXIMUM
LOOP FOR
35 dB LOSS
9.0 kft / 2.75 km
12.3 kft / 3.75 km
16.1 kft / 4.9 km
22.8 kft / 6.95 km
OHMS
PER Kft
83.3
51.9
32.4
16.1
LOSS @
196 Khz dB/Kft
3.880
2.841
2.177
1.535
CABLE
GAUGE
26/0.4 mm
24/0.51 mm
22/0.61 mm
19/0.91 mm
NOTE: Loop limits are for a circuit with 6 dB nominal margin using PIC cable at 68°F.
19 6/96
476
If a span does not met CSA guidelines for HDSL, use the Worksheets in the tables below
to determine whether the span still meets the following design criteria for HDSL:

HDSL Span Design Worksheet for
Maximum 196 kHz Cable Loss @ 135
Ω
IV. Modules – Access
A Total 26 AWG cable length (Kft):
B Calculate total 26 AWG Cable Loss:
C Total 24 AWG cable length (Kft):
D Calculate total 24 AWG cable loss:
E Total 22 AWG cable length (Kft):
F Calculate total 22 AWG cable loss:
G Total 19 AWG cable length (Kft):
H Calculate total 19 AWG cable loss:
I Calculate total cable loss:
J Number of bridge taps:
K Calculate total bridged tap loss:
L Number of cable gauge changes:
M Calculate total cable change loss:
N Calculate total span loss:
IF TOTAL SPAN LOSS IS LESS THAN 35 dB, THE SPAN LOSS IS
WITHIN SPECS. Verify maximum DC loop resistance.
____kFt
(A x 3.88) = ____dB
____kFt
(C x 2.84) = ____dB
____kFt
(E x 2.18) = ____dB
____kFt
(G x 1.5) = ____dB
(B+D+F+H) = ____dB
____

(J x 3.0) = ____dB
____
(L x 1.0) = ____dB
(I + K + M) = ____dB
HDSL Span Design Worksheet for
Maximum DC Loop Resistance
HDSL
Span Design
Worksheets
A Total 26 AWG cable length (Kft):
B Calculate 26 AWG DC loop resistance:
C Total 24 AWG cable length (Kft):
D Calculate 24 AWG DC loop resistance:
E Total 22 AWG cable length (Kft):
F Calculate 22 AWG DC loop resistance:
G Total 19 AWG cable length (Kft):
H Calculate 19 AWG DC loop resistance:
I Cable length from MDF to Equipment Rack (Kft):
J Calculate office loop resistance:
K Cable length: customer interface to HLXR (Kft):
L Calculate customer premises loop resistance:
M Calculate total loop resistance:
IF TOTAL DC LOSS IS LESS THAN 800
Ω, THE SPAN LOSS IS WITHIN
SPECS.
____Kft
(A x 83) = ____Ω
____Kft
(C x 52) = ____Ω
____Kft

(E x 32) = ____Ω
____Kft
(G x 16) = ____Ω
____Kft
(I x 32) ____Ω
____Kft
(K x 32) ____Ω
(B+D+F+H+J+L) =
____
Note: When the HDSL repeater is deployed, each span calculation (HLXC to HRX and
HRX to HLXR) must be calculated separately.
20 6/96
476
IV. Modules – Access
HDSL
Powering
Considerations
The HLXR is loop pow-
ered as shown below for
full duplex T1 transmis-
sion. In this configura-
tion, the HLXC supplies a
constant -130 Vdc to the
span for powering the
HLXR.
TRANSCEIVER
1
TRANSCEIVER
2
LINE

POWER
TRANSCEIVER
1
TRANSCEIVER
2
DC/DC
CONVERTER
POLARITY
INSENSITIVE
T
R
T1
R1
T1
R1
T
R
LOOP 1
LOOP 2
-130 VDC
GROUND
Additionally, the HLXC is required to span power the combination of a mid-span HDSL
repeater and the HLXR unit. This feature require the loop power supply be capable of
generating
+130 Vdc. The HLXC utilizes software intelligence to determine when it is
acceptable to enable the +130 Vdc potential on the loops. The system will always default
to using the -130 Vdc output potential initially. If the HDSL repeater is recognized after
the loops are synchronized, then the loop power can be changed by software to
+130 Vdc.
The repeater application is the only scenario that requires the use of

+130 Vdc.
The D1 HLXR can optionally accept a local -48 Vdc supply. This configuration would fully
support fractional rate applications via single loop provisioning. Individual DS0 channels
can be blocked, adding to the utility of the T1 support. With single loop provisioning, 12
or fewer DS0 channels can be supported over a single pair of wires between the HLXC
and the HLXR.
Both the HLXC and the HLXR units provide voltage and current test points for measur-
ing the loop power parameters. The HLXR provides full DS1 splitting and monitor test
access via jacks mounted directly on the front panel of the module.
ADC’s HDSL system is transparent to any DS1 test method that uses maintenance
related signals carried in the DS1 payload or the facility data link channel in the extended
superframe format (ESF). The system has been designed to allow for testing that would
be analogous to those carried out on repeatered T1s over conventional copper based
facilities.
Both the HLXC and HLXR recognize and respond to 16-bit codes received either in a
DS1 framed or unframed format. Framed codes will be recognized in either frame bit
overwrite or frame bit insert mode. A loopback acknowledgement feature has been added
to the programmable loopback scheme. This feature is always enabled. The acknowledg-
ment sequence will uniquely identify the HDSL module as the physical location of the
loopback point. Loopbacks can also be performed via TL1 command, TBOS or a menu
prompt on the User Craft Interface.
Both the HLXC and HLXR will run a power-up self-test when power is initially applied to
the card. The power-up self-test also verifies loop and DS1 integrity. This will verify that
the card is operational with no internal hardware or software faults. While this test is
running, the front panel LED is yellow. When the test is completed, the LED will turn
green if no faults are detected, and red if faults are detected.
Remote Local
Powering
System Testing
HDSL Loop Powering for Non-Repeater Applications

21 6/96
476
III. Modules – Access
The HDSL transport technology is designed as an alternative to providing DS1 digital
bipolar transmission over repeatered copper pairs. HDSL allows for transmission on
non-loaded, unrepeatered copper pairs for up to 12 Kft. The simplicity of the HDSL
system minimizes engineering and service installation time, dramatically reducing
costs.
The HDSL system may be used to transport a variety of service up to the DS1 rate.
Some of these services include:
• Private DS1 lines
• Switched DS1
• Compressed video
• ISDN Primary Rate Access
• LAN interconnections
• Fractional DS1
• Switched Multimegabit Data Service (SMDS)
HDSL
Applications
Loopback Type
HLXC Customer
HLXC Network
Repeater Customer
Repeater Network
HLXR Customer
HLXR Network
Loopback Location
DS1 Transceiver
HDSL Framer
HDSL Framer (R-side)

HDSL Framer (R-side)
HDSL Framer
DS1 Transceiver
Activate/Deactivate By
Craft / TL1 / HLXR Front Panel Switch
Craft / TL1 / 16 Bit Code
Craft / TL1
Craft / TL1 / 16 Bit Code
Craft TL1
Craft / TL1 / 16 Bit Code / NID Code
Reverse Direction Signal
Network RCV – Network XMT
AIS – CPE
Network RCV – Network XMT
AIS – CPE
Network RCV – Network XMT
AIS – CPE
HDSL Loop Back Implementation
4 3
2 1 56
HLXCNETWORK
SIDE
HLXR CPE
SIDE
REPEATER
DS1
DS1
DS1
XCVR
HDSL

FRAMER
HDSL
XCVR
HDSL
XCVR
HDSL
FRAMER
DS1
XCVR
HDSL
XCVR
HDSL
FRAMER
HDSL
FRAMER
HDSL
XCVR
22 6/96
476
IV. Modules – Access
The Repeater Loop Extender (RLX) module is used in repeatered or
unrepeatered T1 carrier systems operating at a standard T1 signal rate
(1.544 Mbps). The module may be optioned with or without span power-
ing capability. The RLX is equipped with an automatic span power
regulator (ASPR); this option is a 60 mA constant current supply that can
deliver up to 130 Vdc to line repeaters or network interface devices
(NIDs). Up to 28 RLX modules fit into the Soneplex Loop Extender
chassis.
The RLX+ incorporates
+130 Vdc span power. The RLX and RLX+ have

intelligent loopback features similar to the HLXC D1 module, respond to
Heikemien loopbacks, and are capable of span powering modern intelli-
gent repeater modules.
The network DSX interface is a bidirectional, industry standard DS1
interface (Bellcore TR-NTW-000499) for use with cable lengths up to 655
feet. The DSX interface monitors the received signal for loss of signal
(LOS) and bipolar violations (BPVs), as well as cyclic redundancy check
(CRC) errors (extended super frame [ESF] only). The received data is also
monitored for both in-band and ESF data link loop back codes and for
ESF performance monitoring (PM) messages.
The repeater interface is an industry standard, bidirectional long-haul
DS1, bipolar interface. This interface can deliver DS1 service over a
minimum distance of 3000 feet (using 22 AWG plastic insulated cable
[PIC]). This interface may be optioned to provide up to 8 watts of span
power. The repeater interface monitors the received signal for LOS and
BPV as well as CRC-6 errors (ESF only). When using ESF frame format,
the receive line can be monitored for data link loop
back codes and PM messages.
The RLX monitors, collects and reports DS1 performance to the main
processor unit, which in turn provides the interface to an operation support system
(OSS).
Other features of the RLX module include:
• Full duplex and fractional DS1 (individual DS0 blocking)
• D4, ESF framing, SLC 96 and unframed capability
• Bidirectional monitoring of ESF data link
• Bipolar interface receivers monitored for LOS and BPVs
• Network receive data is monitored for in-band loop back codes (2-in-5, 3-in-5, and dual
16 bit)
• CRC-6 error monitoring on receive data streams
• Selectable channel blocking to 7F or FF hex

• Span power, 60 mA, -130 Vdc or
+130 Vdc
Repeater Loop
Extender Module
Description
RLX+
LPBK
STAT
V -
I-
I+
V+
LOS
BER
R
L
X
LOS
BER
NET
LINE
+
23 6/96
476
IV. Modules – Access
Specifications
Powering
Considerations
The RLX and RLX+ input power is -48 Vdc
and may be optioned to provide span power.

The RLX span power option is a 60 mA
constant current supply that can deliver up to
-130 Vdc (8 watts) to line repeaters or NIDs.
The RLX+ span power option operates at a 60
mA constant current supply that can deliver
up to
+130 Vdc (16 watts) to line repeaters or
NIDs. The RLX+ factory default setting is
configured to provide -130 Vdc loop power.
The system can be reconfigured for
+130 Vdc
by modifying a berg pin jumper setting on the
module.
The RLX and RLX+ module can supply 8 and 16 watts respectively of power to external
units, i.e. span repeaters or NIDs. Certain span requirements must be met in order for
simplex power applications to work and several calculations must be made to insure
proper design of the span line. These calculations include:
RLX Module Span Powering
ASPR
T
R
R
T
T
R
R
T
+
_
DS1 Per System:

DS1 Line Rate:
DS1 Line Code:
DS1 Frame Formats:
DSX-1 Interface:
Repeater Interface
Input Level:
Input Power:
Span Power
RLX:
RLX+:
Power Consumption:
Operating Temperature:
Dimensions:
Weight:
1
1.544 Mbps ± 200 bps
AMI and B8ZS
SF, ESF, SLC96 and unframed
per TR-NWT-000499
0dB to -33dB
-42.5 Vdc to -56.5 Vdc
60 mA -130 Vdc maximum
60 mA
+130 Vdc maximum
14 watts maximum with span power enabled; 5 watts
maximum without span power
-40
o
C to +65
o

C
4.385" H x .675" W x 9.75" D (11.14 x 1.7 x 24.76 cm)
.9 lbs (.41 kg)
Total Span Resistance = total loop cable resistance + total loop line repeater resistance +
loop resistance of office repeater
Required Span Voltage = total span resistance x 60 mA
24 6/96
476
IV. Modules – Access
Based on the results of the two calculations from the table on page 23, the number of
span repeaters that typically can be powered by the RLX ASPR (based on typical span
resistances and 60 mA constant current source). This table is not intended for detailed
span design.
DC SPAN
POTENTIAL
21.72
35.16
48.60
62.04
75.48
88.92
102.36
115.80
129.24
142.68
SPAN
RESISTANCE
362
586
810

1034
1258
1482
1706
1930
2154
2378
POSSIBLE NUMBER
OF LINE REPEATERS
1
2
3
4
5
6
7
8
9
10
Powering
Considerations
25 6/96
476
System Testing
IV. Modules – Access
The RLX module recognizes several different loop back schemes used for both turn-up
and fault isolation procedures. The network DSX-1 interface recognizes in-band “11000”
loop-up and “11100” loop-down codes, as well as two 16 bit fixed loop-up and loop-down
codes. The 16 bit codes are fully configurable through software to any 16 bit pattern.
The repeater line interface is monitored in both directions for data link codes and PM

messages when using ESF frame format.
The RLX also provides front panel voltage and current test points for measuring the loop
power parameters.
REPEATER
INTERFACE
REPEATER INTERFACE
MONITOR ESF DATA LINK
AND PM MESSAGES
DSX
INTERFACE
RLX MODULE
NETWORK
RLX Recognizes:
• Loopbacks 2 in 5 (loop up)
• Loopbacks 3 in 5 (loop down)
• Two (16 bit programmable
loop backs)
• Hekimian Loopback codes
Applications
The RLX module is designed to be used in applications where copper is the available
transport medium for DS1 service requirements. Up to 28 RLX modules fit into the
standard 23" Soneplex Loop Extender chassis. This chassis can be used for hubbing in
repeatered loop applications, campus applications, and high rise building applications.
The RLX module can also be used to transport a variety of services up to the DS1 rate,
including:
• Private DS1 lines
• Switched DS1
• Compressed video
• ISDN Primary Rate Access
• LAN interconnections

• Fractional DS1
• Switched Multimegabit Data Service (SMDS)
Hubbing Application
CO/CEV/HUT
CUSTOMER
A
CUSTOMER
B
CUSTOMER
C
3000'
3000'
SPAN LINES
SPAN LINES
SONEPLEX DS1
LOOP EXTENDER
CHASSIS
High Rise Office
Building Applications
OFFICE BUILDING
NID
1-28 DS1s
NID
REPEATERED DS1
•
•
•
FOT SONEPLEX
LOOP EXTENDER
CHASSIS