Patton electronics 2124 User manual

USER
MANUAL
MODEL 2124/2130
Ethernet
MicroBridge
SALES OFFICE
[phone]
TECHNICAL SUPPORT
[phone]
Part# 07M2124-UM
Doc# 08306U2-001,
Rev. B
Revised 10/27/06
An ISO-9001
Certified Company

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TABLE OF CONTENTS
1.0 Warranty Information ................................................................. 2
1.1 Radio and TV Interference............................................................ 2
1.2 CE Notice...................................................................................... 3
1.3 Service.......................................................................................... 3
2.0 General Information.................................................................... 4
2.1 Features........................................................................................ 4
2.2 Description.................................................................................... 4
3.0 PPP Operational Background.................................................... 5
3.1 Applications .................................................................................. 5
4.0 Installation................................................................................... 8
4.1 Connect to 10BaseT Ethernet Port............................................... 8
Connect the 10BaseT Ethernet Port to a Hub.............................. 8
Connect the 10BaseT Ethernet Port to a PC (DTE)..................... 8
4.2 Power Connection ........................................................................ 9
AC Power Supply (100-240VAC) ................................................. 9
DC Power................................................................................... 10
5.0 Configuration ............................................................................ 13
5.1 LED STATUS MONITORS......................................................... 13
LAN side LEDs........................................................................... 13
LED Descriptions........................................................................ 14
Power and DCE/DTE interface LEDs......................................... 14
A Patton Electronics Model 2124
Specifications ........................................................................... 16
B Patton Electronics Model 2130
Specifications ........................................................................... 17
C 2124/2130 Factory
Replacement Parts ................................................................... 18
D 10BaseT Interface Pin Assignment
(RJ-45 Female Connector)
(DTE Configuration).................................................................. 19
E V.24 Terminal Interface Pin Assignment
(DB-25 Male Connector).......................................................... 20
F EIA-530 Terminal Interface Pin Assignment
(DB-25 Male Connector).......................................................... 21
G Power Supply Interface............................................................ 22

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1.0 WARRANTY INFORMATION
Patton Electronics warrants all Model 2124/2130 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 specif-
ically disclaims all other warranties, expressed or implied, and the instal-
lation or use of this product shall be deemed an acceptance of these
terms by the user.
1.1 RADIO AND TV INTERFERENCE
The Model 2124/2130 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 televi-
sion reception. The Model 2124/2130 has been tested and complies
with the limits for a Class A computing device in accordance with the
specification in Subpart J of Part 15 of FCC rules, that are designed to
provide reasonable protection from such interference in a commercial
installation. However, this is no guarantee that interference will not occur
in a particular installation. If the Model 2124/2130 does cause interfer-
ence to radio or television reception, which can be determined by discon-
necting the unit, the user is encouraged to try to correct the interference
by one or more of the following measures: moving the computing equip-
ment 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). In the
event the user detects intermittent or continuous product malfunction due
to nearby high power transmitting radio frequency equipment, the user is
strongly advised to use only a shielded twisted pair data cable that is
bonded to metalized external outer shield plugs at both ends. The use of
a shielded cable satisfies compliance with the Electromagnetic Compati-
bility (EMC) directive.

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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 LowVoltage Directive (LVD) of the Union European (EU). A Cer-
tificate of Compliance is available by contacting Patton Technical Sup-
port.
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 Mate-
rials Authorization (RMA) number on the outside of the shipping con-
tainer. This number may be obtained from Patton Electronics Technical
Support at:
Tel: [phone]
Email: http://www.patton.com
www: suppor[email protected]
Note Packages received without an RMA number will not be
accepted.
Patton Electronics’technical staff is also available to answer any ques-
tions that might arise concerning the installation or use of your Model
2124/2130. Technical Support hours: 8AM to 5PM EST, Monday
through Friday.
WARNING! This device is not intended to be connected to the public
telephone network.

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2.0 GENERAL INFORMATION
Thank you for your purchase of this Patton Electronics product.This
product has been thoroughly inspected and tested and is warranted for
OneYear parts and labor. If any questions or problems arise during
installation or use of this product, please do not hesitate to contact Pat-
ton Electronics Technical Support at [phone].
2.1 FEATURES
• Integral V.24 Male to 10BaseT Ethernet (Model 2124)
• Integral EIA-530 Male to 10BaseT Ethernet (Model 2130)
• Industry standard, shielded RJ-45 10BaseT connection
• 802.3 Ethernet supported by Transparent LAN bridging
• PPP Bridging Control Protocol (RFC 1638) with auto detection for
compatibility with existing Patton Bridge Modules
• 4096 MAC address table
• 1 MB RAM; 128KB FLASH
• Throughput latency of 1 frame
• Automatic LAN MAC address aging
• Nine LEDs monitor power, LAN, and DTE Interface signals
2.2 DESCRIPTION
The Patton Model 2124/2130 MicroBridge is an Ethernet Bridge that pro-
vides LAN extension when used in conjunction with a V.24 or EIA-530
DCE device, such as a DSU/CSU, NTU, or router.The Model 2124/2130
performs transparent Ethernet bridging and functions at the MAC level,
thus is transparent to higher level protocols such as TCP/IP, DECnet,
NETBIOS, and IPX network protocols.Only broadcast, multicast, or
frames set up for peered LAN are forwarded.The Model 2124/2130 is
802.3 Ethernet compliant and supports PPP Bridging Control Protocol
(RFC 1638) on the DTE side.

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3.0 PPP OPERATIONAL BACKGROUND
PPP is a protocol used for multi-plexed transport over a point-to-point
link. PPP operates on all full duplex media, and is a symmetric peer-to-
peer protocol, which can be broken into three main components:1. A
standard method to encapsulate datagrams over serial links; 2. A Link
Control Protocol (LCP) to establish, configure, and test the data-link con-
nection;3.A family of Network Control Protocols (NCPs) to establish and
configure different network layer protocols.
In order to establish communications over a point-to-point link, each end
of the PPP link must first announce its capabilities and agree on the
parameters of the link’s operation.This exchange is facilitated through
LCP Configure-Request packets.
Once the link has been established and optional facilities have been
negotiated, PPP will attempt to establish a network protocol. PPP will
use Network Control Protocol (NCP) to choose and configure one or
more network layer protocols. Once each of the network layer protocols
have been configured, datagrams from the established network layer
protocol can be sent over the link. The link will remain configured for
these communications until explicit LCP or NCP packets close the link
down, or until some external event occurs.
The PPP Bridging Control Protocol (BCP), defined in RFC 1638, config-
ures and enables/disables the bridge protocol on both ends of the point-
to-point link. BCP uses the same packet exchange mechanism as the
Link Control Protocol (LCP). BCP is a Network Control Protocol of PPP,
bridge packets may not be exchanged until PPP has reached the net-
work layer protocol phase.
3.1 APPLICATIONS
In situations where a routed network requires connectivity to a remote
Ethernet network, the interface on a router can be configured as a PPP
IP Half Bridge. The serial line to the remote bridge functions as a Virtual
Ethernet interface, effectively extending the routers serial port connec-
tion to the remote network.The bridge device sends bridge packets
(BPDU's) to the router's serial interface.The router will receive the layer
three address information and will forward these packets based on its IP
address.
Figure 1 shows a typical Cisco router with a serial interface configured
as a PPP Half Bridge.The router serial interface uses a remote device
that supports PPP bridging to function as a node on the remote Ethernet
network.The serial interface on the Cisco will have an IP address on the
same Ethernet subnet as the bridge.

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Figure 1. Cisco router with serial interface, configured as PPP Half Bridge.
For example, the customer site is assigned the addresses 192.168.1.0/
24 through 192.168.1.1/24.The address 192.168.1.1/24 is also the
default gateway for the remote network.The above settings remove any
routing/forwarding intelligence from the CPE.The associated Cisco con-
figuration will set serial interface (s0) to accommodate half bridging for
the above example.
Authentication is optional under PPP. In a point-to-point leased-line link,
incoming customer facilities are usually fixed in nature, therefore authen-
tication is generally not required.If the foreign device requires authenti-
cation via PAP or CHAP, the PPP software will respond with default
Peer-ID consisting of the units Ethernet MAC address and a password
which consists of the unit’s Ethernet MAC address.
Some networking systems do not define network numbers in packets
sent out over a network. If a packet does not have a specific destination
network number, a router will assume that the packet is set up for the
local segment and will not forward it to any other sub-network. However,
in cases where two devices need to communicate over the wide-area,
bridging can be used to transport non-routable protocols.
Figure 2 illustrates transparent bridging between two routers over a
serial interface (s0). Bridging will occur between the two Ethernet Inter-
faces on Router A (e0 and e1) and the two Ethernet Interfaces on Router
B (e0 and e1).

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Figure 2. Transparent bridging between two routers over a serial link.

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4.0 INSTALLATION
The 2124/2130 is equipped with Network, DTE, and power interfaces.
This section briefly describes connnection to each interface.
4.1 CONNECT TO 10BASET ETHERNET PORT
The shielded RJ-45 Ethernet port on the Model 2124/2130 is designed to
connect directly to a 10BaseT network. Figure 3 shows the 10BaseT RJ-
45 port pin description.You may make connections up to 300 feet using
type 4 or 5 cable.
Figure 3. Model 2124/2130 Ethernet connector pinout
Connect the 10BaseT Ethernet Port to a Hub
The Model 2124/2130 10BaseT interface is configured as DTE (Data
Terminal Equipment).Use the diagram below to construct a cable to con-
nect the 2124/2130 to a 10BaseT Hub.
Connect the 10BaseT Ethernet Port to a PC (DTE)
The Model 2124/2130 10BaseT interface is configured as DTE (Data
Terminal Equipment).To connect the 2124/2130 to another DTE such as
a 10BaseT network interface card in a PC, construct a 10BaseT cross-
over cable as shown in the diagram below.

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4.2 POWER CONNECTION
The Model 2124/2130 offers either an AC or DC power supply.
The 2124/2130 provides a strap selectable power supply.
AC Power Supply (100-240VAC)
The Model 2124/2130 uses a 5VDC, 2A universal input 100-240VAC,
power supply (center pin is +5V).The universal input power supply is
equipped with a male IEC-320 connector.This power supply connects to
the Model 2124/2130 via a barrel jack on the rear panel.A variety of
international power cords are available for the universal power supply.
The Model 2124/2130 powers up as soon as it is plugged into an AC out-
let.The unit does not have a power switch.
The 2124/2130 is factory set to be used with the AC power supply.
Note Default setting has strap on position 7 and 8 on J3 for AC power
supply. See Figure 4 below.