Advanced Remote Node (ARN) Enterprise Access

Product Brief
Advanced Remote Node (ARN)
Enterprise Access Router
Delivers extended interface
density and flexibility
• Supports high-performance
• Provides maximum
investment protection
The Advanced Remote Node (ARN*)
from Nortel Networks delivers an
innovative access router architecture
with the performance and modularity
to solve today’s application needs and
meet the increasing demands of the
evolving corporate intranet.
The ARN design integrates the functions of multiple devices to reduce the
complexity of remote network management. Nortel Networks high-speed
access routers significantly lower the
total cost of ownership and provide
the highest degree of investment protection for enterprise networks.
The local area network (LAN –
Ethernet, 10/100Base-TX, 100BaseFX, and Token Ring) interfaces of the
ARN offer flexible connectivity. Its two
wide area network (WAN) adapter
module “slots” provide an array of
options for integrating devices (ISDN
BRI, Data Service Unit/Channel
Service Unit [DSU/CSU], V.34
modem) for primary and backup WAN
connectivity. This modular design
reduces the number of physical devices
and amount of cabling required for
system operation, and also facilitates
remote network management.
Nortel Networks Routing Services
(BayRS*) software offers the most comprehensive WAN service support (leased
line, Frame Relay, X.25, SMDS, Dial
Services, even ATM), allowing customers
to choose the most cost-effective primary
and backup links available for their
remote site applications. BayRS software
WAN optimization features supply key
benefits such as Data Compression,
Traffic Prioritization, Uniform Traffic
Filters, and Dial Optimized Routing.
Increasing available network bandwidth
and maximizing traffic control significantly reduces costs.
Optional expansion modules—including a choice of Ethernet/Multiserial,
7-serial, or tri-serial—offer additional
serial interfaces. The expansion module
can also hold a LAN interface for
integrating existing low-speed legacy
device traffic (Synchronous Data Link
Control [SDLC], Binary Synchronous
Communications [BSC], polled
Async, or X.25) and LAN-based
client/server traffic over a consolidated
WAN link to the corporate backbone.
Delivers extended interface
density and flexibility
With support for up to four LAN and
seven serial interfaces, the ARN provides an ideal platform for remote sites
combining multiple core legacy devices
(SDLC, BSC, polled Async or X.25)
and LAN-based client/server traffic
(IP and IPX) over Frame Relay, X.25,
X.25 PAD leased line, or dial (analog
or ISDN) links (see Figure 1).
The ARN employs Motorola
MC68040 and MC68360 microprocessors to handle the demands of
compute-intensive internetwork
applications. This includes multiprotocol routing, SNA integration, traffic
management, and high-speed WAN
By integrating transmission devices
such as 56K or T1/E1/FT1/FE1 CSU/
DSUs, ISDN BRI, or modems into
the ARN chassis, the number of
multivendor, separately managed
devices and cabling is reduced. This
simplifies remote management and
enhances reliability.
Seamless integration with the enterprise
Supports high-performance
internetwork is ensured through Nortel
Networks Optivity* network manageThe high-performance architecture
ment application support for compreof the ARN supports concurrent
hensive node configuration, monitorexecution of compute-intensive appliing, and control. Optional embedded
cations including SNA network inteEthernet Remote Monitoring (RMON)
gration (Data Link Switching-DLSw),
probes—Data Collection Modules
Advanced Peer-to-Peer Networking
(DCMs)—provide visibility into
(APPN), SDLC, WAN bandwidth
network activity at remote sites
where there is typically
no dedicated support staff.
Fire/security Teller terminal
Teller Machine (ATM) service
Software RMON support
is available for the 10-Mbps
and 100-Mbps systems.
The ARN is a critical part of
the product family. Combined
with the 10BaseT stackable
hubs, 100BaseT hubs,
Ethernet/Fast Ethernet
switches, and remote access
devices, the ARN delivers
a robust, scalable solution
for providing remote
office connectivity to
the enterprise network.
optimization (compression, prioritization, filters), and remote office link
security (firewalling, encryption). Two
types of link routing are supported:
wire-speed LAN-to-LAN (Ethernet,
Fast Ethernet, and/or Token Ring) and
multiple high-speed WAN (T1/FT1/E1).
Provides maximum
investment protection
Beyond answering the needs of most
current remote networks, the futureproof
design of the ARN provides ample
performance headroom for emerging
application requirements. The continuing development of WAN adapter
modules assures an easy, cost-effective
migration path for upgrading to the
newest WAN access technologies.
High-performance processors
and memory modules
The high-performance, highly flexible
base unit of the ARN router contains
a Motorola 33 MHz MC68040 microprocessor, ensuring high forwarding
and filtering rates across each of its
network interfaces.
Frame Relay,
X.25, PPP, credit/debit,
Regional school district
ATM Server
Public LAN
Retailing headquarters
Restricted LAN
Figure 1: Network design options
Fire/security Cash register
In addition, 8, 16, or 32 megabytes
(MB) of DRAM can be installed and
configured to support customized
partitioning between local and global
memory. Router software resides in
local memory while global memory is
dedicated to packet buffers. Through
these reserved buffers, the ARN prevents traffic overflow and resulting network delays caused by large bursts of
traffic, such as file transfer operations.
Base module LAN interfaces
The ARN can be configured to
support 10Base-T Ethernet, autosense
10/100Base-TX (Fast Ethernet),
100Base-FX (Fast Ethernet), and
Token Ring to meet a wide variety
of connectivity requirements.
10Base-T Ethernet/802.3
The 10Base-T Ethernet/802.3 interface supports IEEE 802.3 and Version
1.0/2.0 Ethernet formats. Both an
AUI (DB-15) and RJ-45 connector are
provided for a choice of connectivity.
The ARN 100Base-T interfaces
support the copper and fiber optic
100Base-T cabling standards—
100Base-TX and 100Base-FX—for
flexible connectivity. The 10/100BaseTX autosensing interface automatically
senses the line speed (either 10 Mbps
or 100 Mbps), providing a high-speed
LAN connection to branch offices as
they migrate to Fast Ethernet technologies. An RJ-45 connector is provided
for cable connection. The 100Base-FX
interface provides an ST connector to
allow the use of fiber optic (100BaseFX) cable.
Token Ring
The Token Ring interface can operate
at either 4 or 16 Mbps ring speeds
(software configurable), providing the
flexibility to migrate to higher speeds
as performance requirements dictate.
A 9-pin D subminiature (DB-9)
connector for Shielded Twisted Pair
(STP) and an RJ-45 connector for
Unshielded Twisted Pair (UTP)
are provided for Token Ring cable
Base module expansion options
Personal Computer Memory
Card International Association
(PCMCIA) Flash Memory Card
The 8 or 16 MB of externally accessible PCMCIA Flash memory of the
ARN allows for nonvolatile storage of
router software and configuration files.
Software image and configuration files
can be downloaded remotely to the
flash memory card, simplifying router
upgrades and fault recovery procedures. To facilitate remote configuration and management, the PCMCIA
flash memory card can even be programmed at the network center, mailed
to a remote site, and easily installed by
untrained personnel.
To provide redundancy, the PCMCIA
flash memory card can be logically
divided into two partitions of equal
size. Each partition is a uniquely
addressable and fully functional flash
file system volume where copies of
boot images and configuration files
can be stored.
V.34 Console Modem Module
In addition to the standard console
and external modem interfaces of the
ARN, a V.34 console modem option
can be installed to simplify remote
router deployment. The module also
supports out-of-band troubleshooting
should remote network access become
Redundant Power Supply Unit
For mission-critical deployments, an
optional Nortel Networks Redundant
Power Supply Unit (RPSU) can be
connected to the ARN router, providing a secondary power source in case
its primary power supply fails.
Ethernet RMON Probe
An optional DCM can be attached
directly to the Ethernet base module
of the ARN, providing comprehensive
monitoring capability to the router.
The probe contains a 25 MHz
Motorola MC68040 microprocessor.
It supports all nine groups of the
Ethernet RMON MIB (RFC 1757),
including Layer 3 traffic monitoring.
Through continuous monitoring of the
ARN router’s Ethernet LAN segment,
the DCM collects, correlates, and summarizes long-term network activity
data. The resulting historical information can then be used to detect trends
in network performance, faults, and
traffic flows, as well as to determine
the optimum configuration to
maximize network performance.
LED matrix display
A comprehensive matrix of LEDs
presents clear, at-a-glance status readouts of key ARN system components.
This includes the base module, WAN
adapters, expansion and data collection
modules, PCMCIA memory, RPSU
status, fans, and router software loading.
Along with providing quick insights
into the router’s status, the LED matrix
can also be used to supply networking
administrators with a remote view
of the router’s status via SNMP.
Integral WAN connectivity
The ARN router’s slide-in
WAN adapter modules offer the
functionality of WAN transmission
devices, supplying an integrated
solution that is easily managed as
a single platform. The WAN flexible
interfaces of the ARN enable users
to choose among today’s alternative
wide area networking links, including
Point-to-Point Protocol (PPP)
(synchronous or asynchronous),
Frame Relay, X.25, ISDN,
Switched Multi-megabit Data
Service (SMDS), or Asynchronous
Transfer Mode (ATM).
WAN Modules
Base Modules
Expansion Module
Memory Card
Console and modem ports
Figure 2: Front and rear view of ARN
Up to two WAN adapter modules can
be inserted into the router. The modules
ensure easy, cost-effective upgrades to
newly available, higher bandwidth WAN
services while preserving the initial
router investment (see Figure 2).
WAN adapter module options
The serial interface supports V.35,
RS-232, RS-449/422 balanced, RS530, and X.21. Using either internal
or external clocking, serial interfaces
can be operated at speeds from 1200
bps to 2.048 Mbps, full duplex, and
support the use of T1 and E1 services.
The ARN router’s serial interfaces can
also be used to integrate remote site
SNA devices such as SDLC and BSC
controllers, allowing them to share
WAN access with a site’s LAN traffic.
Nortel Networks support of BSC PassThrough allows customers to converge
BSC 3270 device traffic. Automated
teller machine traffic, for example, can
be put on a high-performance, multiprotocol IP backbone, eliminating
costly dial-up BSC links. Using
standard TCP/IP as the internetwork
transport, dynamic rerouting capability
provides added resiliency for missioncritical BSC data.
Optional V.34
console modem
ISDN Basic Rate Interface (BRI)
Supplying two 64-kbps B-channels for
data and one 16-kbps D-channel for
signaling, ISDN BRI adapter modules
provide an integrated, high-performance
solution for companies interested in
using the extensive dial services offered
by Nortel Networks. They include Dial
Backup, Dial-on-Demand, and
ISDN BRI options are available
with or without an integral Network
Termination 1 (NT1) device, allowing
users to choose the solution that best
fits the requirements of each site. The
ISDN BRI “U” adapter module
provides the necessary integral NT1
interface for direct connection to most
North American ISDN BRI networks.
For locations where the NT1 interface
is provided by a service provider or
Public Telephone and Telegraph
(PTT) company, the ISDN BRI “S/T”
adapter module ensures the necessary
connectivity. Both ISDN BRI modules
support worldwide signaling specifications (see Table 1).
T1/Fractional T1 Data Service Unit/
Channel Service Unit (DSU/CSU)
The T1 and Fractional T1 (FT1)
DSU/CSU module offers high-speed
connectivity to the digital services networks in North America. It is capable
of operating at fractional T1 rates, in
increments of 64 kbps, up to 1.544
Mbps. Users can customize the DS-0s in
the FT1 connection. For example, users
can select DS-0 # 1, 5, 15 and 18 to
make up a 256-kbps Fractional T1 link.
This module is designed to support one
logical channel per one physical interface, typical of a remote branch office
requirement. Extensive diagnostic and
test functions—such as loopback and
Bit Error Rate Test (BERT) tests—are
also built in for easy troubleshooting.
E1/Fractional E1 adapter module
The E1 and Fractional E1 (FE1)
adapter module provides a 2.048
Mbps G.703 interface for high-density
access to a variety of international
communications services.
56/64-kbps DSU/CS
The integral 56/64-kbps DSU/CSU
adapter module provides direct
synchronous access to either 56-kbps
DDS or 64-kbps Clear Channel
dedicated services, facilitating a simpler
connection between the router and the
service provider’s facilities. Extensive
diagnostic and loopback test capabilities—
Table 1: Supported ISDN signaling specifications
ISDN Standard
North America
Euro ISDN (CTR4)
National ISDN-1
Nortel Networks DMS-100 and DMS-250
including the generation of and
response to ITU-T V.54 Remote
Loopback—allow network administrators to readily pinpoint WAN connection difficulties with either router,
DSU, or WAN facilities. This makes
the ARN easier to troubleshoot.
V.34 modem
When Switched 56 or ISDN BRI
services are not available or considered
cost-effective, the ARN router’s integral V.34 modem adapter module can
be used to support Nortel Networks
dial services capabilities. Modem
adapter module speeds range from
1,200 bps to 115,200 bps on standard
analog telephone lines. Providing nominal speeds of 28.8 kbps, the V.34
modem’s standard V.42bis compression
capabilities boost throughput to 115.2
kbps or greater. Standard V.42 and
MNP 10 error correction capabilities
also ensure reliable transmission of
mission-critical data.
X.25 PAD
The ARN X.25 PAD option provides
support for legacy applications that use
the X.25 protocol for communications.
Retail and banking customers are
typical users of X.25. Many customers
are planning to replace their X.25
backbone network with a more cost-
effective backbone network—such as
Frame Relay—using IP. The ARN PAD
option offers the capability to these customers to migrate to an IP-based network. The PAD can use the IPEX feature to forward the packets destined to
an X.25 host via a non-X.25 WAN
backbone, such as Frame Relay. Or, the
PAD can present X.25 data directly to
an X.25 WAN backbone. Figure 3 illustrates a typical X.25 PAD application.
Auxiliary remote expansion
The ARN router’s optional expansion
modules allow the router to be configured to support a second LAN interface (Ethernet or Token Ring) and/or
three or seven serial (Synchronous/
Asynchronous) interfaces. Along with
the new ARN Ethernet/Multiserial
and 7-serial expansion modules,
options include Tri-Serial, Ethernet,
Ethernet plus Tri-Serial, Token Ring,
or Token Ring plus Tri-Serial. The
expansion module’s serial interfaces
provide three connections for synchronous or asynchronous WAN circuits
and/or legacy devices.
Similar to the base module of the
ARN, Ethernet-based expansion
modules can be continuously
monitored through use of the
Nortel Networks DCM.
Branch Location
Central site
Async devices
WAN Backbone/X.25
non- X.s5
w/X.25 PAD
X.25 Host
Figure 3: Typical X.25 application
Power options
The ARN is available with one 100
to 240 VAC power supply or one -48
VDC to -60 VDC power supply.
Maximized connectivity and
interoperability via BayRS
The ARN runs BayRS router software
to maximize efficiency for remote office
connectivity in multivendor, multiprotocol environments and supports all
major network and bridging protocols.
Software options
Three different levels of software are
available for the ARN router, including
IP Access, Remote Office, and
Corporate (see Table 3 at the end of
this document). This allows the ARN
to be configured with software that
best fits the remote site’s requirements.
Traffic management
Comprehensive traffic management
capabilities are provided to the ARN
router through the use of BayRS Data
Compression, Traffic Prioritization,
and Uniform Traffic Filters.
Data Compression
Configurable on a per-circuit or link
basis, Nortel Networks software-based
Data Compression feature is supported
by all Nortel Networks routers,
maximizing internetwork performance
by reducing the amount of bandwidth
required to transport traffic over the
WAN. Data Compression is supported
over Frame Relay, X.25, and PPP
(over leased lines and dial-up analog or
ISDN links), maximizing throughput
over ARN full-duplex WAN links.
Traffic Prioritization
To ensure the highest quality of
service, Traffic Prioritization allows
high-priority delivery to be assigned to
time-sensitive and/or mission-critical
traffic. Traffic Prioritization reduces the
occurrence of session timeouts and
improves application response times.
Priority filters can be configured to
place packets into one of three priority
queues—high, normal, or low. Priority
filters can be applied to the complete
family of network and bridging protocols
supported by Nortel Networks routers.
Priorities can be assigned to packets
based on their protocol, source, destination address, packet type, and other
protocol-specific fields. Other fields
that are identifiable by a fixed offset in
a packet can also be assigned priorities.
Traffic Prioritization uses either a strict
dequeuing algorithm or a bandwidth
allocation dequeuing algorithm to
transmit packets across a serial line.
Strict dequeuing transmits all packets
from the high-priority queue before
transmitting packets from the normal
and low-priority queues. Bandwidth
allocation dequeuing ensures that large
amounts of high-priority traffic do not
prevent transmission of other traffic,
based on configurable bandwidth allocation percentages for each queue.
Uniform Traffic Filters
Inbound and outbound Uniform Traffic
Filters can be applied to all network and
bridge protocol traffic. Uniform Traffic
Filters is a useful tool for network
administrators in developing an effective and comprehensive network security strategy. In addition, Uniform Traffic
Filters preserves WAN bandwidth and
can increase performance by reducing
network congestion.
Uniform Traffic Filters can be configured to accept or drop packets at any
Nortel Networks router’s network
interface. Additionally, they can log
matches between a packet and a filter,
providing an audit trail for particular
network activity.
Differentiated Services for QoS
In addition to other traffic management features, BayRS supports
Differentiated Services (DiffServ)
for scalable, end-to-end, standardsbased IP QoS. The ARN will classify
and condition packets by setting
Differentiated Services Code Point
(DSCP) bits based on policy filter
information. Policy-based filters may
be statically defined or set dynamically
from the central Optivity Policy Server.
DiffServ identifies three classes of
Service: Expedited Forwarding, Assured
Forwarding, or Default. Several dequeuing mechanisms are supported for such
traffic, including Strict Dequeuing,
Bandwidth Allocation, Weighted Fair
Queuing (WFQ), Random Early
Detection (RED, and Weighted
Random Early Detection (WRED).
Remote installation
and management
Remote installation of the ARN router
is simplified through the use of EZ
Install and EZ Update, two software
applications designed to make installations, reconfigurations, and software
updates from a central site quick and
easy. In addition, remote management
is facilitated by the DCM’s standard
Ethernet RMON features, which can
be used to analyze the attributes and
operating patterns of the remote network.
EZ Install
The EZ Install application eliminates
the time and expense of sending a
technical resource to install and
configure an ARN router. At the
remote site, once the LAN and serial
interfaces of the ARN are connected
and the unit is powered up, the ARN
obtains its software image from flash
memory and its configuration file from
EZ Install over the network. By using
EZ Install, the ARN is able to automatically obtain its IP address from
a central site Nortel Networks router,
and its configuration file from a central
site server using the BootP protocol
(see Figure 4). After verifying that a
configuration file has been successfully
downloaded to the DRAM of the
ARN via EZ Install, the configuration
data is saved to flash memory for
nonvolatile local storage.
EZ Update
The EZ Update application facilitates
the automatic downloading of software updates and configuration files,
minimizing the time and expense
associated with remote site software
maintenance. The existing ARN
configuration file and software image
are stored in the nonvolatile flash
memory of the ARN for use as backup
in case problems are encountered
while downloading new software.
To use EZ Update, the ARN is dynamically configured to boot its configuration file and software image from the
central site. The ARN can then be
rebooted or power-cycled, and a new
configuration file and/or software image
downloaded to the DRAM of the
ARN from a central site server. Once
it has been determined that the new
configuration file or software update is
acceptable, it can be saved to the flash
memory of the ARN, replacing the
previous configuration file and/or
software image.
SNMP-based node management
Nortel Networks Optivity network
management applications deliver a
complete, SNMP-based enterprise
management solution that provides
operation, policy, and design services
for end-to-end management of routers,
hubs, and switches. This approach
enables proactive network planning and
accelerates problem solving, resulting in
reduced costs associated with owning
and operating corporate internetworks
of any size.
Router system management
System management directly supports
the Bay Command Console (command
line interface), HTTP-based, SNMPbased, and the Technican’s Interface for
router configuration (static and dynamic), monitoring, and management services. Depending on the service, these
can be accessed out-of-band, through a
local console or modem connection or
in-band through a telnet connection.
The Bay Command Console (BCC)
is a terminal-based (TTY-compatible)
tool that enables device configuration
and maintenance. The BCC addresses
customer requirements to provide a
complete, easy-to-use, and efficient
management interface. The BCC
provides a simplified, English wordstyle command set. The BCC provides
an integrated collection of tools for
effective configuration, monitoring,
and debugging of a network device.
The BCC allows you to enter
Technician Interface commands and
scripts at the BCC command line
prompt. The BCC provides access
to, and manipulation of, the Nortel
Networks router MIB. The BCC is
accessed through the terminal-based
Technician Interface (TI).
The Technican Interface tool enables
basic configuration and maintenance.
The Technician Interface is based on a
simple command line interpreter that
supports SNMP-based access to the
Management Information Base (MIB),
displays event logs, and supports file
system management and other
administrative commands.
Table 2: Nortel Networks ARN specifications
Technical specifications
Base module using Motorola MC68040 microprocessor
Two adapter modules per base module
One expansion module per base module
Two data collection modules—one per base module and one per expansion module
Ethernet (15-pin AUI connector, RJ-45)
Token Ring (9-pin AU connector)
10/100Base-TX (RJ-45)
100Base-FX (ST)
Serial (44-pin: RS-449/422, RS-232, RS-530, V.28, V.35, X.21)
ISDN BRI U (RJ-45: integral NT1)
56/64-kbps DSU/CSU (RJ-45)
T1/FT1 DSU/CSU Adapter Module (RJ-45)
E1/FE1 Adapter Module (RJ-45)
E1/FE1 Adapter Module (BNC)
V.34 Modem (RJ-45)
AC voltage
100/240 VAC at 1.0 A maximum
Wall receptacle
NEMA 5-15R (100/240 VAC) (for use in North America)
DC voltage
Environmental and regulatory
- Input
Voltage -48 to 60.7 VDC (±20%)
- Input
Current 1.5 A -38 VDC
2.80 in. (7.12 cm)
17.25 in. (43.84 cm)
12.50 in. (31.77 cm)
15 lb (6.80 kg)
0 to 8000 ft (0 – 2400 m)
10% to 90% (noncondensing)
32° to 122° F (0° to 50° C)
UL 1950, TUV EN60 950, CSA 22.2 950
FCC Part 15, VDE 0878, Limit B, CISPR 22B
Table 3: ARN software functionality and availability
Functionality and availability
IP access
Remote office
BayRS options
Network protocols
- IP
- Novell IPX
- AppleTalk Phase2
- DECnet Phase IV
- Banyan VINES
- Xerox XNS
IBM integration
Source Route Bridge
LAN Network Manager Agent
Data Link Switching for Ethernet
and Token Ring
Data Link Switching for SDLC
Transparent Sync Pass-Through
BSC Pass-Through
Transparent (Ethernet)
Translation Bridge Ethernet/Token Ring
Native Mode LAN (NML)
Wide Area Networking
HDLC Encapsulation
Frame Relay
X.25 (including IPEX)
Dial Backup
Traffic management
Data Compression
DiffServ Queue Management Services
Traffic Prioritization
Uniform Traffic Filters
Multiline Circuits
Dial Optimized Routing
Node management
EZ Install/EZ Update
Dynamic Loader
RMON (requires DCM hardware option)
Table 4: ARN router ordering information
Ordering Information
Model No.
Ethernet Base Module
ARN with one Ethernet interface and 8 MB DRAM memory (110/220 V)
ARN with one Ethernet interface and 16 MB DRAM memory (110/220 V)
ARN with one Ethernet interface and 32 MB DRAM memory (110/220 V)
DC ARN with one Ethernet interface and 8 MB DRAM memory
DC ARN with one Ethernet interface and 16 MB DRAM memory
DC ARN with one Ethernet interface and 32 MB DRAM memory
ARN with one 10/100Base-TX Ethernet Autosense interface and 8 MB DRAM memory (110/220 V)
ARN with one 10/100Base-TX Ethernet Autosense interface and 16 MB DRAM memory (110/220 V)
ARN with one 10/100Base-TX Ethernet Autosense interface and 32 MB DRAM memory (110/220 V)
ARN with one 100Base-FX Fast Ethernet interface and 8 MB DRAM memory (110/220 V)
ARN with one 100Base-FX Fast Ethernet interface and 16 MB DRAM memory (110/220 V)
ARN with one 100Base-FX Fast Ethernet interface and 32 B DRAM memory (110/220 V)
Token Ring Base Module
ARN with one Token Ring interface and 8 MB DRAM memory (110/220 V)
ARN with one Token Ring interface and 16 MB DRAM memory (110/220 V)
ARN with one Token Ring interface and 32 MB DRAM memory (110/220 V)
WAN Adapter Modules
Serial Adapter Module
ISDN BRI S/T (without NT1) Adapter Module
ISDN BRI U (with NT1 ) Adapter Module
56/64K DSU/CSU Adapter Module
V.34 Modem Adapter Module (North American only)
T1/Fractional T1 DSU/CSU Adapter Module (North American only)
X.25 PAD Module
E1/FE1 Adapter Module (RJ-45)
E1/FE1 Adapter Module (BNC)
Expansion Modules
Tri-Serial Expansion Module
Ethernet Expansion Module
Token Ring Expansion Module
Ethernet plus Tri-Serial Expansion Module
Token Ring plus Tri-Serial Expansion Module
ARN Ethernet 7-Serial Expansion Module
ARN 7-Serial Expansion Module
System Software
x = software version number
(e.g., 1, 2, etc.)
BayRS for IP Access on 8 MB PCMCIA flash
BayRS for Remote Office on 8 MB PCMCIA flash
BayRS for Corporate on 8 MB PCMCIA flash
BayRS for IP Access on 16 MB PCMCIA flash
BayRS for Remote Office on 16 MB PCMCIA flash
BayRS for Corporate on 16 MB PCMCIA flash
Data Collection Module
Ethernet RMON DCM—fits base module and/or expansion module
Console Modem Module
V.34 Console Modem module (North American only)
Redundant Power Supply Unit
Redundant Power Supply Unit (low watt)
HTTP-based monitoring
The embedded Web server complements
and extends the functionality of existing
SNMP-based and command line interfaces (CLIs) such as Site Manager and the
TI/BCC.The HTTP-based interface
allows authorized Web browsers to
access device management information
for monitoring and troubleshooting.
Users can display event logs, support file
system management, and other administrative commands. Users can directly
access the BCC from their browser
window to resolve configuration issues.
Ordering Note: Adapter modules, expansion
module, and system software must be ordered
separately for each ARN. Each ARN includes an
installation manual, power cord, and console cable
kit. The purchase of one complete set of Nortel
Networks documentation (Router Installation
Documents, Router Management Documents, and
Technician’s Interface and Hardware Documents)
for each central site is recommended.
Acronym Glossary
Advanced Peer-to-Peer
Advanced Remote Node
Nortel Networks Routing
Bay Command Console
Basic Rate Interface
Binary Synchronous
Command Line Interface
Channel Service Unit
Data Collection Module
Data Link Switching
Dynamic Random Access
Data Service Unit
Internet Protocol
Internet Protocol Exchange
Local Area Network
Management Information
Native Mode L N
Network Termination 1
Point-to-Point Protocol
Public Telephone and
Request For Comment
Remote Monitoring
Redundant Power Supply Unit
Synchronous Data Link Control
Shielded Twisted Pair
Transmission Control
Protocol/Internet Protocol
Unshielded Twisted Pair
Wide Area Network
Nortel Networks is an industry leader and innovator focused on transforming how the world communicates and
exchanges information. The company is supplying its service provider and enterprise customers with communications
technology and infrastructure to enable value-added IP data, voice and multimedia services spanning Metro Networks,
Wireless Networks, and Optical Long Haul Networks. As a global company, Nortel Networks does business in more than
150 countries. More information about Nortel Networks can be found on the web at:
In the United States:
Nortel Networks
35 Davis Drive
Research Triangle Park,
North Carolina 27709
In Canada:
Nortel Networks
8200 Dixie Road,
Suite 100
Brampton, Ontario L6T 5P6
In Europe:
Nortel Networks
Maidenhead Office Park
Westacott Way
Maidenhead Berkshire SL6 3QH
In Asia:
Nortel Networks Singapore Pte Ltd
151 Lorong Chuan #02-01
New Tech Park,
Singapore 556741
For more information, contact your Nortel Networks representative, or call 1-800-4 NORTEL or 1-800-466-7835 from anywhere in North America.
*Nortel, Nortel Networks, and the Nortel Networks corporate logo are trademarks of Nortel Networks.
All other trademarks are the property of their owners.
Copyright © 2002 Nortel Networks. All rights reserved. Information in this document is subject to change without notice.
Nortel Networks assumes no responsibility for any errors that may appear in this document.
In Australia:
Nortel Networks Australia Pty Limited
380 St. Kilda Road
5th/6th Floor
Melbourne, Victoria
Australia 3004