Patton 2112 User Manual

USER
MANUAL

MODEL 2112

100-User
Network Access Bridge

CERTIFIED

An ISO-9001

Certified

Company

Part# 07M2112-A
Doc# 033081UA
Revised 06/22/99

SALES OFFICE
[phone]
TECHNICAL SUPPORT
[phone]
http://www.patton.com

1 2

TTAABBLLEE OOFF CCOONNTTEENNTTSS

SECTION PAGE

1.0 Warranty Information..............................................................2

1.1 Radio and TV Interference

1.2. CE Notice

1.3 Service

2.0 General Information ...............................................................4

2.1 Features

2.2 Description

2.3 Typical Application

3.0 Installation..............................................................................6

3.1 Connecting the Twisted Pair Line Interface

3.2 Connecting the 10BaseT Ethernet Interface

3.3 Connecting Power

4.0 Operation .............................................................................10

4.1 Power- Up

4.2 Front Panel LED Status Monitors

4.3 Ethernet LED Status Monitors

4.4 Test Modes

Appendix A - Specifications........................................................14

Appendix B - Factory Replacement Parts and Accessories.......15

Appendix C - Interface Pin Assignments....................................16

Appendix D - Control Port Pin Assignment.................................37

11..00 WWAARRRRAANNTTYY IINNFFOORRMMAATTIIOONN

Patton Electronics warrants all Model 2112 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 following: 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.

1.1 RADIO AND TV INTERFERENCE

The Model 2112 generates and uses radio frequency energy, and
if not installed and used properly—that is, in strict accordance with the
manufacturer's instructions—may cause interference to radio and tele­vision reception. The Model 2112 has been tested and found to com­ply with the limits for a Class A computing device in accordance with
the specifications in Subpart J of Part 15 of FCC rules, which are
designed to provide reasonable protection from such interference in a
commercial installation. However, there is no guarantee that interfer­ence will not occur in a particular installation. If the Model 2112 does
cause interference to radio or television reception, which can be deter­mined by disconnecting the unit, the user is encouraged to try to cor­rect the interference by one or more of the following measures: mov­ing the computing equipment away from the receiver, re-orienting the
receiving antenna and/or plugging the receiving equipment into a differ­ent AC outlet (such that the computing equipment and receiver are on
different branches).

1.2 CE NOTICE

The CE symbol on your Patton Electronics equipment indicates
that it is in compliance with the Electromagnetic Compatibility (EMC)
directive and the Low Voltage Directive (LVD) of the European Union
(EU). A Certificate of Compliance is available by contacting Technical
Support.

3 4

1.3 SERVICE

All warranty and non-warranty repairs must be returned freight
prepaid and insured to Patton Electronics. All returns must have a
Return Materials Authorization number on the outside of the shipping
container. This number may be obtained from Patton Electronics
Technical Service at:

tel: [phone]

email: [e-mail]

www: http://www.patton.com

Patton Electronics' technical staff is also available to answer any
questions that might arise concerning the installation or use of your
Model 2112. Technical Service hours: 8AM to 5PM EST, Monday

through Friday.

22..00 GGEENNEERRAALL IINNFFOORRMMAATTIIOONN

Thank you for your purchase of this Patton Electronics product.
This product has been thoroughly inspected and tested and is warrant­ed for One Year parts and labor. If any questions or problems arise
during installation or use of this product, please do not hesitate to con­tact Patton Electronics Technical Support at [phone].

2.1 FEATURES

• Easy to Install -- No Configuration Required

• Full duplex bridging function over two wires

• Provides MAC level connection between two peer Ethernet LANs

• Operates transparently to higher level protocols such as TCP/IP,
DECnet, NETBIOS and IPX

• Automatically discovers, loads and deletes MAC addresses

• Point to Point distance of 3 Miles

• Loopback and pattern generator diagnostic

• LEDindicators for TD, RD, CTS, CD, DTR, TM, ER and NS
for line status

• LED indicators for status and link integrity for Ethernet port

• Made in the U.S.A.

2.2 DESCRIPTION
The Patton Electronics Model 2112-CO and 2112-CP 100-User

Ethernet LAN Bridge Extenders provide seamless LAN extension

between peered Ethernet LANs with all of the benefits of MAC level
bridging. You already own the twisted pair, why not use it to forward
Ethernet data to another Ethernet LAN -- up to 3.6 miles away!

Operating in pairs with a Model 2112-CO (looks like Central Office
equipment) on one end and a Model 2112-CP (looks like Customer
Premises equipment) on the other end, can automatically forward LAN
broadcasts, multi-casts and frames across the 2-Wire twisted pair link.
What’s more, the 2112s automatically add and delete MAC addresses,
only passing packets across the twisted pair that are meant for the
remote peered LAN. Higher level protocols such as TCP/IP, DECnet,
NETBIOS and IPX pass transparently through the Model 2112s without
modification.

WARNING! This device is not intended to be con-

nected to the public telephone network.

NOTE: Packages received without an RMA number will

not be accepted.

5 6

2.3 TYPICAL APPLICATION

The 2112-CO and 2112-CP work together to create an extension
between 2 peer Ethernet LANs with all the benefits of MAC bridging.
The following diagram shows a typical application

3.0 INSTALLATION

The Model 2112 requires no configuration. You only need to con­nect the Ethernet interface, line interface between the units and power.
This section describes these connections.

3.1 CONNECTING THE TWISTED PAIR LINE INTERFACE

The Model 2112 supports communication between two peer
Ethernet LAN sites at a distance up to 3.6 miles (5.8 km) over 24AWG
(.5mm) twisted pair wire. Follow the steps below to successfully con­nect the Model 2112 Line Interfaces.

1. These units work in

pairs

. One unit in the pair must be a
Model 2112-CO (looks like Central Office equipment), and the
other unit must be a Model 2112-CP (looks like Customer
Premises equipment). It does not matter which end is the
2112-CO and which is the 2112-CP.

2. To function properly, the two Model 2112s must be connected
together using twisted pair metallic wire. This twisted pair
must be

unconditioned

, dry, metallic wire, between 19
(.9mm) and 26 AWG (.4mm). Standard dial-up telephone cir­cuits, or leased circuits that run through signal equalization
equipment, or standard, flat modular telephone type cable,
are

not acceptable

.

Corporate Headquarters

LAN

LAN

Ρεµοτε/Σατελλιτε Οφφιχε

Model 2112-CO

Model 2112-CP

2-Wire Leased Line

Figure 2. Model 2112 Rear Panel.

Figure 1. Typical Application

Line

Interface

10BaseT
Interface

IEC Power

Jack

Power
Switch

7 8

3. Observe the Signal/Pin relationships on the Model 2112’s Line
Interface jack. This Line Interface is a 2 wire interface.

4. Connect the Line interface of a Model 2112-CO to the Line
interface of a Model 2112-CP with a twisted pair cable as
shown below:

SIGNAL PIN PIN SIGNAL

Tip 4 --------------------------4 Tip
Ring 5 --------------------------5 Ring

3.2 CONNECTING THE 10BASET ETHERNET INTERFACE

The RJ-45 jack labeled “Interface Port” is the 10BaseT interface.
This port is designed to connect directly to a 10BaseT network. Figure
4, below, shows the Signal/Pin relationships on this interface. You may
connect this port to another Ethernet port via a Type 4 or Type 5 cable
that is up to 330 feet long.

3.2.1 Connecting the 10Base-T Ethernet Port to a Hub

The Model 2112 10Base-T interface is configured as DTE (Data
Terminal Equipment), just like a 10Base-T network interface card in a
PC. Therefore, it “expects” to connect to a 10Base-T Hub using a
straight-through RJ-45 cable. Use the diagram below to construct a
cable to connect the 2112 to a 10Base-T Hub.

2112 10Base-T Hub
RJ-45 Pin No. RJ-45 Pin No.

1 (TX+)-------------------------------------------------1 (RX+)
2 (TX-)--------------------------------------------------2 (RX-)
3 (RX+) -------------------------------------------------3 (TX+)
6 (RX-)--------------------------------------------------6 (TX-)

3.2.2 Connecting the 10Base-T Ethernet Port to a PC (DTE)

The Model 21121 10Base-T interface is configured as DTE (Data
Terminal Equipment). If you wish to connect the 2112 to another DTE
device such as a 10Base-T network interface card in a PC, you must
construct a 10Base-T crossover cable as shown in the diagram below.

2112 10Base-T DTE
RJ-45 Pin No. RJ-45 Pin No.

1 (TX+) 1 (TX+)
2 (TX-) 2 (TX-)
3 (RX+) 3 (RX+)
6 (RX-) 6 (RX-)

Figure 4. Line Interface.

1 TD+ (data output from 2112
2 TD- (data output from 2112)
3 RD+ (data input to 2112)
4 (no connection)
5 (no connection)
6 RD- (data input to 2112)
7 (no connection)
8 (no connection)

1
2
3
4
5
6
7
8

NOTE: Any modular twisted pair cable connected to the
Model 2112 must be shielded cable, and the outer shield
must be properly terminated to a shielded modular plug on
both ends of the cable

Figure 3. Model 2112 twisted pair line interface.

1 (N/C)
2 (N/C)
3 (N/C)
4 (Tip)
5 (Ring)
6 (N/C)
7 (N/C)
8 (N/C)

1
2
3
4
5
6
7
8

9 10

3.3 CONNECTING POWER

The Model 2112 is available with a Universal AC power supply
that is operable in power environments from 100 to 253VAC. No con­figuration is necessary for the power supply (See Appendix B for
domestic and international power plug options).

3.3.1 Connecting to an AC Power Power Source

The Universal Interface AC Supply is equipped with a male IEC­320 power connection. A domestic (US) power supply cord is supplied
with the unit at no extra charge. To connect the standard or universwal
power supply, follow these steps:

1. Attach the power cord (supplied) to the shrouded male IEC­320 connector on the rear of the Model 2112.

2. Plug the power cord into a nearby AC power outlet

3. Turn the rear power switch ON.

4.0 OPERATION

Once the Model 2112 is properly installed, it should operate trans­parently. This sections describes power-up, reading the LED status
monitors, and using the built-in loopback test modes.

4.1 POWER-UP

To apply power to the Model 2112, first be sure that you have read
Section 3.3, and that the unit is connected to the appropriate power
source. Then power-up the unit using the rear power switch.

4.2 FRONT PANEL LED STATUS MONITORS

The Model 2112 features eight front panel LEDs that monitor
power, the Ethernet signals, network connection and test modes.
Figure 4 (below) shows the front panel location of each LED.
Following Figure 4 is a description of each LEDs function.

TD & RD Glows red to indicate an idle condition of Binary

“1” data on the respective terminal interface signals.
Green indicates Binary “0” data.

CTS Glows green to indicate that the Clear to Send

signal from the modem is active.

CD Glows red if no carrier signal is being received from

the remote modem. Green indicates that the remote
modem’s carrier is being received.

DTR Glows green to indicate that the Data Terminal

Ready signal from the terminal is active.

ER Glows red to indicate the likelihood of a Bit Error in

the received signal. During the 511 or 511/E test, ER
will flash to indicate that the Test Pattern Detector
has detected a bit error.

Figure 4. Model 2112 Front Panel

WARNING! There are no user-serviceable parts in

the power supply section of the Model 2112. Voltage
setting changes and fuse replacement should only be
performed by qulified service personnel. Contact
Patton Electronics Technical Support at (301)975­1007, via our web-site at www.patton.com, or by email
at [e-mail] for more information

11 12

TM Glows red to indicate that the Model 2112 has

been placed in Test Mode. The unit can be placed in
test mode by the local or remote user.

NS Glow red to indicate that the local Model 2112 has

not yet connected with the remote.

4.3 ETHERNET LED STATUS MONITORS

The Model 2112 features two LEDs that monitor general operating
status and the 10Base-T twisted pair link integrity (located on the rear
of the unit). Figure 5 (below) shows the LEDs located directly beneath
the RJ-45 jack. Following Figure 5 is a description of each LEDs func­tion.

Status Blinks yellow from one to four times to indicate

system status. Each pulse pattern is separated by a
2 second “off” period. Greater pulse patterns have
higher priority (buffer saturation has greater priority
than an empty MAC table). Valid system statuses
are:

Pulses

Status

1 System status ok.
2 No MAC entries in the MAC address table.
3 Clear to send (CTS) or Carrier Detect (CD)

from base unit is not asserted.
4 Bridge module buffer is saturated.
5 WAN receive frame(s) too large.
6 WAN receive frame(s) not octet aligned.
7 WAN receive frames(s) aborted.
8 Detected WAN receive frame(s) with bad

CRC.
9 Detected LAN receive frame(s) too large.
10 Detected LAN receive frame(s) not octet

aligned.

11 Detected LAN receive frame(s) with bad CRC.
Link Glows green to indicate good link integrity on the

10Base-T twisted pair line.

4.4 TEST MODES

The Model 2112 offers a proprietary loopback test mode, plus a
built-in V.52 BER test pattern generator, to evaluate the condition of
the modems and the communication link. These tests can be activated
physically from the front panel.

4.4.1 Using Local Line Loopback (LLB)

The Local Line Loopback (LLB) test checks the operation of the
local Model 2112, and is performed separately on each unit. Any data
sent to the local Model 2112 in this test mode will be echoed (returned)
back to the user device.

To perform a LLB test, follow these steps:

1. Activate LLB. Move the front panel toggle switch UP to
“Local”. Once LLB is activated, the Model 2112 transmitter
output is connected to its own receiver. The “TM” LED should
be lit.

2. Verify that the data terminal equipment is operating properly
and can be used for a test. If a fault is indicated, call a
technician or replace the unit.

4.4.2 Remote Digital Loopback (RDL)

Remote Digital Loopback (RDL) is not an available feature on the
Model 2112.

4.4.3 Using the V.52 (BER) Test Pattern Generator

To use the V.52 BER tests in conjunction with the loopback test follow
these instructions:

1. Locate the “511/511E” toggle switch on the front panel of the
2112 and move it UP. This activates the V.52 BER test
mode and transmits a “511” test pattern into the loop. If any
errors are present, the local modem’s red “ER” LED will blink
sporadically.

Figure 5. Model IM1/I Panel

Status LED

Link LED

Quik-Connect

Interface Module

Interface Port

13 14

2. If the above test indicates no errors are present, move the
V.52 toggle switch DOWN, activating the “511/E” test with
errors present. If the test is working properly, the local
modem's red “ER” LED will glow. A successful “511/E” test
will confirm that the link is in place, and that the Model
2112’s built-in “511” generator and detector are working
properly.

APPENDIX A

PATTON ELECTRONICS MODEL 2112 SPECIFICATIONS

LAN Connection: RJ-45, 10Base-T, IEEE 802.3 Ethernet
MAC Address Table Size: 4096 entries

MAC Address Aging: MAC addresses deleted after 8 minutes

inactivity

On-board Memory: 512 KB RAM; 128 KB FLASH
Frame Latency: 1 frame
Transmission Line: Two-Wire unconditioned twisted pair

Diagnostics: V.52 compliant bit error rate pattern

(511/511E pattern) generator and detec
tor with error injection mode; Local Line
Loopback activated by front panel switch

LED Status Indicators: TD, RD, CTS, CD, DTR, NS(no signal),

ER (error), TM (test mode) on front
panel; (1) general status; (1) link integri
ty on rear panel

Connectors: RJ-45 on line side; RJ-45 on Ethernet

Port

Power: 100-253 VAC, 50-60 Hz (universal

input);

Temperature Range: 32-122°F (0° -50°C)
Altitude: 0-15,000 feet
Humidity: 5 to 95% non-condensing
Dimensions:

7.3” x 6.6” x 1.62” (185mm x 168mm x
41mm)

15 16

APPENDIX B

PATTON ELECTRONICS MODEL 2112 FACTORY REPLACEMENT

PARTS

AND ACCESSORIES

Patton Electronics Model #

Description

0805US ...........................American Power Cord

0805EUR.........................European Power Cord CEE 7

0805UK ...........................United Kingdom Power Cord

0805AUS.........................Australia/New Zealand Power Cord

0805DEN.........................Denmark Power Cord

0805FR............................France/Belgium Power Cord

0805IN.............................India Power Cord

0805IS.............................Israel Power Cord

0805JAP..........................Japan Power Cord

0805SW...........................Switzerland Power Cord

AAPPPPEENNDDIIXX CC

MODEL 2112 INTERFACE PIN ASSIGNMENT

10BASE-T Interface Pin Description

(RJ-45 Female Connector)

(DTE Configuration)

1 TD+ (data output from 2112)
2 TD- (data output from 2112)
3 RD+ (data input to 2112 )
4 (no connection)
5 (no connection)
6 RD- (data input to 2112)
7 (no connection)
8 (no connection)

1
2
3
4
5
6
7
8

17

AAPPPPEENNDDIIXX DD

MODEL 2112 INTERFACE PIN ASSIGNMENT

(continued)

Line Interface Pin Description

(RJ-45 Female Connector)

All Rights Reserved

Figure 3. Model 2112 twisted pair lineinterface.

1 (N/C)
2 (N/C)
3 (N/C)
4 (Tip)
5 (Ring)
6 (N/C)
7 (N/C)
8 (N/C)

1
2
3
4
5
6
7
8

Dear Valued Customer,

Thank you for purchasing Patton Electronics products! We
do appreciate your business. I trust that you find this user manual
helpful.

W e manufacture one of the widest selections of data commu­nications products in the world including CSU/DSU’s, network termina­tion units, powered and self-powered short range modems, fiber optic
modems, interface converters, baluns, electronic data switches, data­line surge protectors, multiplexers, transceivers, hubs, print servers
and much more. We produce these products at our Gaithersburg, MD,
USA, facility, and can custom manufacture products for your unique
needs.

W e would like to hear from you. Please contact us in any of
the following ways to tell us how you like this product and how we can
meet your product needs today and in the future.

Web: http://www.patton.com

Sales E-mail: [e-mail]

Support E-mail: [e-mail]

Phone - Sales [phone]

Phone - Support [phone]

Fax: [phone]

Mail: Patton Electronics Company

7622 Rickenbacker Drive
Gaithersburg, MD 20879 USA

W e are committed to a quality product at a quality price.
Patton Electronics is BABT and ISO 9001 certified. We meet and
exceed the highest standards in the industry (CE, UL, etc.).

It is our business to serve you. If you are not satisfied with
any aspect of this product or the service provided from Patton
Electronics or its distributors, please let m e

know.

Thank you.

Burton A.Patton

V ice President

P.S. Please tell us where you purchased this product.
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