Patton electronics DIAMONDLINK 3201 User manual

Model 3201 and Model 3241
G.SHDSL Router
Modems
User Guide
Sales Office: [phone]
Technical Support: [phone]
E-mail: s[email protected]om
URL: www.patton.com
Part Number: 07M3201, Rev. D
Revised: June 27, 2011
Important
This is a Class A device and is intended for use in a light industrial environment. It is not intended nor approved for use in an industrial
or residential environment.
For Quick
Start Installation
see page 21

Patton Electronics Company, Inc.
7622 Rickenbacker Drive
Gaithersburg, MD 20879 USA
Tel: [phone]
Fax: [phone]
Support: [phone]
Web: www.patton.com
E-mail: [e-mail]
Trademark Statement
All trademarks presented in this document are the property of their respective owners.
Copyright © 2009-2011, Patton Electronics Company. All rights reserved.
The information in this document is subject to change without notice. Patton Elec-
tronics assumes no liability for errors that may appear in this document.
Warranty Information
Patton Electronics warrants all Model 3201 & 3241 components to be free from
defects, and will—at our option—repair or replace the product should it fail within
one year from the first date of shipment.
This warranty is limited to defects in workmanship or materials, and does not cover
customer damage, abuse or unauthorized modification. If this product fails or does not
perform as warranted, your sole recourse shall be repair or replacement as described
above. Under no condition shall Patton Electronics be liable for any damages incurred
by the use of this product. These damages include, but are not limited to, the follow-
ing: lost profits, lost savings and incidental or consequential damages arising from the
use of or inability to use this product. Patton Electronics specifically disclaims all other
warranties, expressed or implied, and the installation or use of this product shall be
deemed an acceptance of these terms by the user.
Note
Conformity documents of all Patton products can be viewed online at
www.patton.com under the appropriate product page.

3
Contents
Audience................................................................................................................................................................. 7
Structure................................................................................................................................................................. 7
Precautions ............................................................................................................................................................. 8
Safety when working with electricity .................................................................................................................9
General observations .........................................................................................................................................9
Factory default parameters .................................................................................................................................... 10
Typographical conventions used in this document................................................................................................ 11
General conventions .......................................................................................................................................11
Mouse conventions .........................................................................................................................................11
Model 3201/3241 G.SHDSL Router Modem overview ........................................................................................13
General attributes ............................................................................................................................................13
G.SHDSL Characteristics (Models 3201 and 3241) .......................................................................................13
Ethernet ..........................................................................................................................................................13
Protocol support .............................................................................................................................................14
PPP Support ...................................................................................................................................................14
ATM Protocols ...............................................................................................................................................14
Management ...................................................................................................................................................14
Security ...........................................................................................................................................................14
Front Panel Status LEDs .......................................................................................................................................15
Rear panel connectors and switches .................................................................................................................15
Power input connector ....................................................................................................................................16
External AC universal power supply ..........................................................................................................16
External 48 VDC power supply ................................................................................................................16
Console port (outlined in red) .........................................................................................................................17
Ethernet port (outlined in green) ....................................................................................................................17
MDI-X ...........................................................................................................................................................17
Line port (outlined in yellow) .........................................................................................................................17
Product Overview..................................................................................................................................................19
Applications Overview ....................................................................................................................................19
Hardware installation ............................................................................................................................................22
What you will need .........................................................................................................................................22
Identify the connectors and attach the cables ..................................................................................................22
Connect the Line Interface ........................................................................................................................22
Connect the Ethernet Interface .................................................................................................................23
Connect the Power Source ........................................................................................................................23
Router/Bridge Status LEDs .......................................................................................................................23
Web Operation and Configuration .................................................................................................................24
Connect to a PC .......................................................................................................................................24
Change the IP address .....................................................................................................................................26
Introduction..........................................................................................................................................................28

4
Model 3201 G.SHDSL Integrated Access Device User Guide Contents
Two stand-alone units directly connected..............................................................................................................29
Ethernet Extension (HDLC - PPPoH Bridged) ..............................................................................................29
Network Extension (HDLC—PPPoH Routed) ..............................................................................................32
DSLAM Connections with remote CPE units.......................................................................................................38
Bridged application configurations to a DSLAM ............................................................................................38
RFC 1483 Bridged Configuration. ............................................................................................................38
PPPoH Bridged Configuration .................................................................................................................41
PPPoA Bridged (RFC 2364) Configuration ..............................................................................................44
Routed application configurations to a DSLAM .............................................................................................46
RFC 1483 Routed .....................................................................................................................................46
PPPoH Routed .........................................................................................................................................53
PPPoA Routed (RFC 2364) ......................................................................................................................60
IPoA Routed (RFC 1577) ........................................................................................................................72
IP Configurations..................................................................................................................................................79
Router .............................................................................................................................................................79
DHCP Server and Relay .................................................................................................................................80
Introduction..........................................................................................................................................................84
Configuring the router ..........................................................................................................................................84
Configuring the security interfaces.........................................................................................................................85
Deleting a Firewall Policy ...............................................................................................................................86
Enabling the Firewall.............................................................................................................................................87
Firewall Portfilters .................................................................................................................................................87
Security Triggers....................................................................................................................................................88
Intrusion Detection System (IDS) .........................................................................................................................89
Introduction..........................................................................................................................................................93
Creating an Ethernet Transport.............................................................................................................................93
Creating a DSL Link .............................................................................................................................................93
Central Side Configuration .............................................................................................................................94
Remote Side Configuration .............................................................................................................................94
Creating an ATM Routable Link...........................................................................................................................95
Remote side configuration ..............................................................................................................................95
Central side configuration ...............................................................................................................................95
Creating a route for Remote and Central PCs........................................................................................................96
Remote side configuration ..............................................................................................................................96
Central side configuration ...............................................................................................................................96
NAT Configuration...............................................................................................................................................98
Status LEDs.........................................................................................................................................................101
Ping.....................................................................................................................................................................103
Software Upgrades...............................................................................................................................................103
Configuration ...............................................................................................................................................103
Procedure ......................................................................................................................................................103
Introduction........................................................................................................................................................106
Contact information............................................................................................................................................106
Warranty Service and Returned Merchandise Authorizations (RMAs).................................................................106

5
Model 3201 G.SHDSL Integrated Access Device User Guide Contents
Warranty coverage ........................................................................................................................................106
Out-of-warranty service ...........................................................................................................................106
Returns for credit ....................................................................................................................................106
Return for credit policy ...........................................................................................................................107
RMA numbers ..............................................................................................................................................107
Shipping instructions ..............................................................................................................................107
A Compliance information ............................................................................................................................ 108
Compliance .........................................................................................................................................................109
EMC .............................................................................................................................................................109
Safety ............................................................................................................................................................109
PSTN Regulatory ..........................................................................................................................................109
FCC Part 68 (ACTA) Statement .........................................................................................................................109
Radio and TV Interference (FCC Part 15) ..........................................................................................................109
Industry Canada Notice ......................................................................................................................................110
CE Declaration of Conformity ............................................................................................................................110
Authorized European Representative ...................................................................................................................110
B Specifications .............................................................................................................................................. 111
General Characteristics ........................................................................................................................................112
G.SHDSL Characteristics (Model 3201/3241)....................................................................................................112
Ethernet ..............................................................................................................................................................112
Protocol Support .................................................................................................................................................113
PPP Support........................................................................................................................................................113
ATM Protocols....................................................................................................................................................113
Management .......................................................................................................................................................114
Security ...............................................................................................................................................................114
Compliance Standard Requirements....................................................................................................................114
Australia Specific .....................................................................................................................................114
Dimensions .........................................................................................................................................................115
Power and Power Supply Specifications...............................................................................................................115
C Cable Recommendations ............................................................................................................................ 117
DSL Cable...........................................................................................................................................................118
Ethernet Cable ....................................................................................................................................................118
Adapter................................................................................................................................................................118
D Physical Connectors ................................................................................................................................... 119
RJ-45 shielded 10/100 Ethernet port...................................................................................................................120
RJ-11 non-shielded port ......................................................................................................................................120
RJ-45 non-shielded RS-232 console port (EIA-561)............................................................................................120
Power input.........................................................................................................................................................120
E Command Line Interface (CLI) Operation ................................................................................................ 121
Introduction........................................................................................................................................................122
CLI Terminology ................................................................................................................................................122
Local (VT-100 emulation) ............................................................................................................................122

6
Model 3201 G.SHDSL Integrated Access Device User Guide Contents
Remote (Telnet) ............................................................................................................................................122
Using the Console .........................................................................................................................................123
Administering user accounts................................................................................................................................124
Adding new users ..........................................................................................................................................124
Setting user passwords ...................................................................................................................................125
Changing user settings ..................................................................................................................................125
Controlling login access ..........................................................................................................................125
Controlling user access ............................................................................................................................126
G.SHDSL Commands: .................................................................................................................................126
To establish the DSL link ........................................................................................................................126

7
About this guide
This guide describes installing and configuring a Patton Electronics Model 3201 or 3241 G.SHDSL Router
modem. The instructions in this guide are based on the following assumptions:
•The router modem will connect to another router modem or DSLAM
•There is a LAN connected to the Ethernet port of the router modem
•Users will be connected to remote router modems
Audience
This guide is intended for the following users:
•Operators
•Installers
•Maintenance technicians
Structure
This guide contains the following chapters and appendices:
•Chapter 1 provides information about router modem features and capabilities
•Chapter 2 contains an overview describing router modem operation
•Chapter 3 provides quick start installation procedures
•Chapter 4 describes configuring the router modem for typical applications
•Chapter 5 describes configuring the router modem for specialized applications
•Chapter 6 describes configuring security for the router modem
•Chapter 7 describes configuring for network address translation (NAT)
•Chapter 8 contains definitions for the LED status indicators
•Chapter 9 describes router modem diagnostics
•Appendix A contains compliance information for the router modems
•Appendix B contains specifications for the router modems
•Appendix C provides cable recommendations
•Appendix D describes the router modem’s ports
•Appendix E describes how to use the command line interface (CLI)
For best results, read the contents of this guide before you install the router modem.

8
Model 3201 G.SHDSL Integrated Access Device User Guide About this guide
Precautions
Notes and cautions, which have the following meanings, are used throughout this guide to help you become
aware of potential Router modem problems. Warnings relate to personal injury issues, and Cautions refer to
potential property damage.
Note Calls attention to important information.
The shock hazard symbol and WARNING heading indicate a potential electric
shock hazard. Strictly follow the warning instructions to avoid injury caused
by electric shock.
The alert symbol and WARNING heading indicate a potential safety hazard.
Strictly follow the warning instructions to avoid personal injury.
The shock hazard symbol and CAUTION heading indicate a
potential electric shock hazard. Strictly follow the instructions to
avoid property damage caused by electric shock.
The alert symbol and CAUTION heading indicate a potential haz-
ard. Strictly follow the instructions to avoid property damage.
WARNING
WARNING
CAUTION
CAUTION

9
Model 3201 G.SHDSL Integrated Access Device User Guide About this guide
Safety when working with electricity
General observations
•Clean the case with a soft slightly moist anti-static cloth
•Place the unit on a flat surface and ensure free air circulation
•Avoid exposing the unit to direct sunlight and other heat sources
•Protect the unit from moisture, vapors, and corrosive liquids
• This device contains no user serviceable parts. The equipment shall be
returned to Patton Electronics for repairs, or repaired by qualified service
personnel.
• The external power adapter shall be a listed Limited Power Source. The
mains outlet that is utilized to power the devise shall be within 10 feet (3
meters) of the device, shall be easily accessible, and protected by a circuit
breaker.
• If an AC power adapter is used, ensure that the power cable used meets
all applicable standards for the country in which it is to be installed, and
that it is connected to a wall outlet which has earth ground.
• Hazardous network voltages are present in WAN ports regardless of
whether power to the unit is ON or OFF. To avoid electric shock, use cau-
tion when near WAN ports. When detaching the cables, detach the end
away from the device first.
• Do not work on the system or connect or disconnect cables during periods
of lightning activity.
In accordance with the requirements of council directive 2002/
96/EC on Waste of Electrical and Electronic Equipment (WEEE),
ensure that at end-of-life you separate this product from other
waste and scrap and deliver to the WEEE collection system in
your country for recycling.
WARNING

10
Model 3201 G.SHDSL Integrated Access Device User Guide About this guide
Factory default parameters
The Model 3201/R G.SHDSL router modem has the following factory default parameters.
•Ethernet IP address: 192.168.200.10/24
•WAN Connection: PPPoH Routed
•WAN IP address: 10.1.1.1
•Autonegotiate the G.SHDSL speed.
The Models 3201/I/CP and 3201/I/CO bridge modems have the following factory default parameters.
•Ethernet IP Address:
—192.168.200.10 (for the CP version)
—192.168.200.11 (for the CO version)
•Autonegotiate the G.SHDSL speed.

11
Model 3201 G.SHDSL Integrated Access Device User Guide About this guide
Typographical conventions used in this document
This section describes the typographical conventions and terms used in this guide.
General conventions
The procedures described in this manual use the following text conventions:
Mouse conventions
The following conventions are used when describing mouse actions:
Table 1. General conventions
Convention Meaning
Futura bold type Indicates the names of menu bar options.
Italicized Futura type Indicates the names of options on pull-down menus.
Futura type
Indicates the names of fields or windows.
Garamond bold type Indicates the names of command buttons that execute an action.
< >
Angle brackets indicate function and keyboard keys, such as <SHIFT>,
<CTRL>, <C>, and so on.
Are you ready? All system messages and prompts appear in the Courier font as the
system would display them.
% dir *.* Bold Courier font indicates where the operator must type a response or
command
Table 2. Mouse conventions
Convention Meaning
Left mouse button This button refers to the primary or leftmost mouse button (unless you have
changed the default configuration).
Right mouse button This button refers the secondary or rightmost mouse button (unless you have
changed the default configuration).
Point This word means to move the mouse in such a way that the tip of the pointing
arrow on the screen ends up resting at the desired location.
Click Means to quickly press and release the left or right mouse button (as instructed in
the procedure). Make sure you do not move the mouse pointer while clicking a
mouse button.
Double-click Means to press and release the same mouse button two times quickly
Drag This word means to point the arrow and then hold down the left or right mouse but-
ton (as instructed in the procedure) as you move the mouse to a new location.
When you have moved the mouse pointer to the desired location, you can release
the mouse button.

12
Chapter 1 General Information
Chapter contents
Model 3201/3241 G.SHDSL Router Modem overview ........................................................................................13
General attributes ............................................................................................................................................13
G.SHDSL Characteristics (Models 3201 and 3241) .......................................................................................13
Ethernet ..........................................................................................................................................................13
Protocol support .............................................................................................................................................14
PPP Support ...................................................................................................................................................14
ATM Protocols ...............................................................................................................................................14
Management ...................................................................................................................................................14
Security ...........................................................................................................................................................14
Front Panel Status LEDs .......................................................................................................................................15
Rear panel connectors and switches .................................................................................................................15
Power input connector ....................................................................................................................................16
External AC universal power supply ..........................................................................................................16
External 48 VDC power supply ................................................................................................................16
Console port (outlined in red) .........................................................................................................................17
Ethernet port (outlined in green) ....................................................................................................................17
MDI-X ...........................................................................................................................................................17
Line port (outlined in yellow) .........................................................................................................................17

Model 3201/3241 G.SHDSL Router Modem overview 13
Model 3201 G.SHDSL Integrated Access Device User Guide 1 • General Information
Model 3201/3241 G.SHDSL Router Modem overview
The Patton Models 3201 and 3241 router modems are G.SHDSL routers/bridges for delivering basic and
advanced IP services from the wide-area network to a local 10/100Base-T Ethernet LAN.
G.SHDSL offers an alternative, standards based DSL transmission medium. It offers connection speeds of 2.3
Mbps (Model 3201) or 4.6 Mbps (Model 3241) in each direction over a single twisted-pair (TP). Supporting
100 or more users, the router modems are optimized for users in a small office, as an enterprise tele-working
solution or for multimedia high-speed Internet access. Local and remote web-based management ensures easy
setup and continuous trouble-free operation.
The following sections describe Model 3201 and 3241 features and capabilities:
•General attributes, see page 13
•G.SHDSL Characteristics (Model 3201/3241), see page 13
•Ethernet, see page 13
•Protocol support, see page 14
•PPP support, see page 14
•ATM protocols, see page 14
•Management, see page 14
•Security, see page 14
General attributes
•Compact low-cost plug-and-play router
•10/100 Ethernet
•Comprehensive hardware diagnostics, works with any operating system, easy maintenance and effortless
installation.
•Built-in web configuration.
•Simple software upgrade using FTP into FLASH memory.
•Eight front panel LEDs indicate Power, DSL WAN, Ethernet LAN speed and status.
•Convenient and standard RJ connectors for Ethernet, Line, and Console.
G.SHDSL Characteristics (Models 3201 and 3241)
•2.3 Mbps (Model 3201) or 4.6 Mbps (Model 3241) speed over 2 wires.
•DTE rates:
-Model 3201: 144 kbps to 2.32 Mbps, nx64k with n=3 to 36
-Model 3241: 144 kbps to 4.6 Mbps, nxz64k n=3 to 72.
•Distance from 24,900 feet (7,589 m) at 144kbps (192 kbps line rate) to 10,200 feet (3,109 m) at 2.3 mbps
on 26 AWG (0.4 mm) wire
•CO and CP modes supported
•EOC Management channel for remote end-to-end management.
Ethernet
•Auto-sensing full-duplex 10Base-T/100Base-TX Ethernet.
•Standard RJ-45 and built-in MDI-X cross-over switch.
•IEEE 8021.d transparent learning bridge up to 1,024 addresses and Spanning Tree.

Model 3201/3241 G.SHDSL Router Modem overview 14
Model 3201 G.SHDSL Integrated Access Device User Guide 1 • General Information
Protocol support
•Complete internetworking with IP (RFC 741), TCP (RFC 793), UDP (RFC 768), ICMP (RFC 950),
ARP (RFC 826).
•IP Router with RIP (RFC 1058), RIPv2 (RFC 2453) for up to 64 static routes.
•Built-in Ping and Traceroute facilities.
•Integrated DHCP Server (RFC 2131).
•DHCP relay agent (RFC 2132/RFC 1542) with 8 individual address pools.
•DNS Relay with primary and secondary Name Server selection.
•NAT (RFC 3022) with Network Address Port Translation (NAPT), MultiNat with 1:1, Many:1,
Many:Many mapping, Port/IP redirection and mapping.
PPP Support
•Point-to-Point Protocol over HDLC
•PPPoA (RFC 2364) Point-to-Point Protocol over ATM.
•PPPoE (RFC 2516) Client for autonomous network connection. Eliminates the requirement of installing
client software on a local PC and allows sharing of the connection across a LAN.
•User configurable PPP PAP (RFC 1661) or CHAP (RFC 1994) authentication..
ATM Protocols
•Multiprotocol over ATM AAL5 and Multiprotocol Bridged encapsulation RFC 2684 (Formerly RFC
1483) and RFC 1577 Classical IP over ATM. Default RFC-1483 route mode. Logical Link Control
(LLC)/ Subnetwork Access Protocol (SNAP) encapsulation. Default VC mux mode.
•ATM UNI 3.0, 3.1, and 4.0 signaling ATM QoS with UBR, CBR, nrt-VBR, and rt-VBR.
•Peak cell rate shaping on a per-VCC basis up to 32 active VCCs across VPI 0-255, VCI 0-65525. Single
default PVC: 8/35 with PCR=5,500 cells.
Management
•User selectable ATM, PPP, or HDLC WAN datalink connection.
•Web-Based configuration via embedded web server
•CLI menu for configuration, management, and diagnostics.
•Local/Remote CLI (VT-100 or Telnet).
•SNMPv1 (RFC 1157) MIB II (RFC 1213)
•Logging via SYSLOG, and VT-100 console. Console port set at 9600 bps 8/N/1 settings no flow control.
•EOC access for End-To-End management, configuration, and control.
Security
•Packet filtering firewall for controlled access to and from LAN/WAN.
•DoS Detection/protection.
•Password protected system.
•Access list for up to 5 hosts/networks which are allowed to access management system SNMP/HTTP/TEL-
NET.
•Logging or SMTP on events: POST, POST errors, line/DSL, PPP/DHCP, IP.

Front Panel Status LEDs 15
Model 3201 G.SHDSL Integrated Access Device User Guide 1 • General Information
Front Panel Status LEDs
The G.SHDSL routers have all status LEDs on the front panel of the unit, and all electrical connections are
located on the rear panel.
Figure 1. Model 3201
The status LEDs from left to right are (see table 3 for LED descriptions):
•Power
•WAN Link, Tx, and Rx
•Ethernet Link, 100M, Tx, and Rx
Rear panel connectors and switches
On the rear panel from left to right are the following:
•Power input connector
•Console Port
•Ethernet connector
•MDI-X switch
•Line connector
Table 3. Status LED descriptions
Power Yellow ON indicates that power is applied. Off indicates that no power is applied.
2 Hz flash occurs during POST
1 Hz flash occurs for non-fatal error.
8 Hz flash on all LEDs for fatal POST outcome or critical error.
WAN
(DSL)
Link Yellow Solid yellow: connected
2 Hz flash: training
8 Hz flash: DSL error
No indication: no signal detected.
TX Yellow Flashing: when transmitting data from the unit to the WAN.
RX Yellow Flashing: when receiving data from the WAN to the unit.
Ethernet Link Yellow On: Ethernet is linked.
100M Yellow On: 100 Mbps Ethernet is selected.
TX Yellow Flashing: when data is transmitted from the unit to the LAN.
RX Yellow Flashing: when data is received from the LAN.

Front Panel Status LEDs 16
Model 3201 G.SHDSL Integrated Access Device User Guide 1 • General Information
Power input connector
The router modem comes with an AC or DC power supply. (see “Power and Power Supply Specifications” on
page 115)
•The power connection to the router modem is a 2.5 mm barrel receptacle with the center conductor posi-
tive (see figure 2).
•5 VDC, 1 A
Figure 2. Power connection barrel receptacle 5 VDC diagram
External AC universal power supply
For additonal specifications, see “Power and Power Supply Specifications” on page 115.
•Output from power supply: 5 VDC, 2 A
•Input to power supply: universal input 100–240 VAC 50/60 Hz 0.3A
External 48 VDC power supply
Refer to see “Power and Power Supply Specifications” on page 115 for additonal specifications.
•Input
-Rated voltage: 36–60 VDC
-Rated current: 0.25 A DC
-3-pin locking connector, 3.5 mm pitch
-Transient over-voltage protection, 100VDC at 2 ms
•Output
-Rated voltage: 5 VDC ± 5%, 5W
-Rated current; 1 A DC
-6-inch cable terminated with 2.5 mm barrel plug, center positive
An approved external power supply that incorporates a discon-
nect device must be used and positioned within easy reach of
the operator’s position.
Connect the equipment to a 5 VDC source that is electrically iso-
lated from the AC source. The 5 VDC source is to be reliably
connected to earth.
Connect the equipment to a 30–60 VDC source that is electri-
cally isolated from the AC source. The 30–60 VDC source is to
be reliably connected to earth.
5 VDC
CAUTION
CAUTION
CAUTION

Front Panel Status LEDs 17
Model 3201 G.SHDSL Integrated Access Device User Guide 1 • General Information
Console port (outlined in red)
The unshielded RJ-45 RS-232 console DCE port (EIA-561) with the pin-out listed in the following table:
Ethernet port (outlined in green)
Shielded RJ-45 10Base-T/100Base-TX Ethernet port using pins 1,2,3, & 6. See MDI-X switch for hub or trans-
ceiver configuration.The following table defines conditions that occur when the MDI-X switch is in the out position.
MDI-X
The MDI-X push switch operates as follows:
•When in the default out position, the Ethernet circuitry takes on a straight-through MDI configuration and
functions as a transceiver. It will connect directly to a hub.
•When in the in position, the Ethernet circuitry is configured in cross-over MDI-X mode so that a straight-
through cable can connect the Model 3201 DSL modem’s Ethernet port directly to a PC’s NIC card.
Line port (outlined in yellow)
The RJ-11/4 DSL line port uses pins 2 and 3 of the RJ-11 port.
Pin No. Signal Direction Signal Name
1Out DSR
2Out CD
3In DTR
4 — Signal Ground
5Out RD
6In TD
7Out CTS
8In RTS
Pin No. Signal Direction Signal Name
1Output TX+
2Output TX-
3 Input RX+
4 — —
5 — —
6 Input RX-
7 — —
8 — —
Pin No. Signal Name
1 —
2In/Out-A
3In/Out-B
4 —

18
Chapter 2 Product Overview
Chapter contents
Product Overview..................................................................................................................................................19
Applications Overview ....................................................................................................................................19

Product Overview 19
Model 3201 G.SHDSL Integrated Access Device User Guide 2 • Product Overview
Product Overview
The Model 3201 modem operates as a bridge or a router and has two ports for communication:
•The Ethernet port—Connects to the LAN side of the connection
•The Line port—Provides the G.SHDSL transmission connection between the CPE and CO DSL modem
The modem provides all layer 2 and layer 3 protocols required for end-to-end-link communication.
When configuring the 3201, questions must be answered so the 3201 functions as desired. For example, when
a router or bridge module needs to be activated, some questions would be:
•Is a default gateway required?
•Which encapsulation technique is best for this application: PPPoA, Frame Relay, PPPoE or another?
These decisions can be made and implemented more easily if the Model 3201’s fundamental architecture is
understood. Also, while configuring the Model 3201 via a browser using the built-in HTTP server is very intui-
tive, an understanding of the architecture is essential when using the command-line interface (CLI) commands.
The fundamental building blocks comprise a router or bridge, interfaces, and transports. The router and bridge
each have interfaces. A transport provides the path between an interface and an external connection. For exam-
ple, the Ethernet transport attaches to an Internet Protocol (IP) interface. A transport consists of layer 2 and
everything below it. Creating a transport and attaching it to a bridge or router’s interface enables data to be
bridged or routed. The supported transports are PPPoA, PPPoE, Frame Relay, RFC 1483 (Multiprotocol
Encapsulation over ATM AAL5), IPoA, PPPoH, and Ethernet.
Configuring an interface and transport for the router or bridge requires naming the interface and transport before
attaching them. When using the built-in HTTP server web browser, this is done automatically. But when config-
uring the Model 3201 via CLI commands through the RS-232 control port, it must be done manually.
Model 3201 modems can connect over an ATM PVC or HDLC transport.
The PVC requires the configuration of the virtual path identifier (VPI) and virtual circuit identifier (VCI). The
VPI can be any integer between 0–4095 inclusive. The general rule for the VCI is an integer between 1–65,535
inclusive. Examples in this manual use a VCI of 600 or above. The main restriction in choosing a VCI is that
VCIs below 32 are reserved for such predefined functions as ILMI. The VCI values of 600 and above used in
this manual are also above the range used by many signaling implementations for SVCs.
The HDLC is a packet-based transmission across the DSL Link.
Several ATM connections are offered to address a variety of user applications. Although they all use RFC1483
as the transport mechanism between the two 3201 modems, WAN services may use different PPP applications,
such as PPPoE routed, PPPoA routed, or PPPoA bridged. Each one has its advantages and disadvantages.
Applications Overview
The Model 3201 is used for bridged or routed applications.
Note In bridged applications the 3201 modem functions transparently on layer 2 to
provide MAC level bridging for Ethernet networks. The bridging is between
Ethernet and the DSL link between the two 3201 modems. The devices
attached to each 3201 are on the same subnet. The number of attached devices
and the size of the filter table are configurable. No IP address is necessary unless

Product Overview 20
Model 3201 G.SHDSL Integrated Access Device User Guide 2 • Product Overview
the administrator desires management through a web browser. Then an IP
address is necessary for the administrator to access the 3201 modem.
In a typical bridged configuration, the DSL bridge is transparent to the network. It bridges the DSL line to
the Ethernet line, making both sides appear as a single subnet. However, it may still be beneficial to provide an
IP address to the DSL modem for management. In the bridged configuration it is not necessary for the Ether-
net port to have an IP address.
Figure 3. Bridged Application
In a typical routed configuration, the DSL router is treated as a separate device on the network that receives
packets from the PC and DSLAM. The Ethernet and DSL networks are configured as separate IP subnets. The
PC must have the DSL router set up as its default gateway.
Figure 4. Routed Application
Model 3201 applications are divided as follows:
•Connecting two stand-alone Model 3201 Bridge/Routers back-to-back using PPPoH Bridged or PPPoH
Routed. PPPoH Bridged can be considered as Ethernet extension since the same logical LAN exists at both
ends of the 3201s and only bridging is required. PPPoH is network extension in the more general sense
since a different logical network is on each end of the 3201s.
•Connecting the Model 3201 bridge/routers as a CPE device to a DSLAM. They can be configured for
bridged or routed mode.
–The bridged modes commonly used to connect to a DSLAM are RFC1483, HDLC (PPPoH), and
PPPoA.
–The routed modes are RFC1483, HDLC (PPPoH), PPPoA, IPoA and PPPoE.
For more information about router modem applications, refer to Chapter 4, “Basic Application Configura-
tions” on page 27 and Chapter 5, “Specialized Configurations” on page 78.
Subnet 1 Subnet 1
DSL
Modem
DSL
Modem
DSL
Subnet 1
Subnet 2 Internet
DSLAM
DSL
Modem