Ethernet Bridge EtherBridge-R

Bridge Ethernet LAN Segments with the Asynchronous Serial Ethernet Bridge

  • No configuration, easy setup mode LAN bridge
  • Learning ethernet bridge
  • Protocol independent
  • No routing configuration required..... ever
  • 10/100BaseT ethernet interface
  • RS-232/422/485(4 wire, RS-485 2-wire available with multi-point firmware ) interface at 230.4 Kbps
  • Opto-isolated RS-422/485 version available
  • Available with optional 2nd independent WAN port
  • Ideal companion to 900 mHz and 2.4 gHz spread spectrum wireless modems
  • Advanced Management allows SNMP, web browser, telnet, or terminal management
  • Meets RoHS Specifications
  • Point-to-point and multi-point versions available


Indicators (front panel)
Lan Connection
Data Port


Download the UserManual

How To Order



The EtherSeries Bridge is an easy to use serial ethernet bridge. The link between the EtherSeries serial bridges is asynchronous RS-232, RS-422, or RS-485 (4 wire) (RS-485 2-wire with multi-point firmware) running at speeds between 300 bps and 230.4 Kbps.

Ethernet bridging is also available on the second WAN port, which is ideal for higher density host sites or daisy chaining bridges, commonly used for SCADA applications.

The EtherSeries Bridge is 100% protocol independent. It will bridge TCP/IP, AppleTalk, DecNet, NetBEUI, or any protocol that can be transported over ethernet. This makes the asynchronous Ethernet Bridge easy to set up. No configuration is necessary.

The asynchronous EtherSeries Bridge transfers data over the bridge only if it is destined for an ethernet address (MAC layer address) on the other side of the bridge. Traffic is filtered, much the same way an ethernet switch filters ethernet traffic, to maximize available bandwidth. Unless advanced management is required, no IP address is involved and there is no set-up other than matching serial port speeds. Advanced management allows SNMP, web browser, and telnet based management of the bridge.

The Ethernet bridge learns the addresses quickly. This allows, for example, a technician to be working at one end of the bridge with a laptop computer, then move the laptop to the other side, with no need to reset the bridge. The bridge learns within a few packet times that the computer and its ethernet address moved to the other side of the bridge.

For low traffic LAN bridge locations, this can be deployed as a dial-up bridge. As an ethernet client bridge, the LAN bridge would dial into a host ethernet bridge location upon command. This is the ideal way for bridging ethernet at remote sites that don't justify full time connections.

The EtherSeries bridge is much easier to use than a router. There is no IP address that must be set up in the bridge. There is no subnet mask to setup. There is no destination IP address to setup. You just plug it in and use the network. Popular in the early 90's, bridging technology was often abandoned as communication equipment hardware grew to offer routing capability. However, using a router for small networks adds tremendous complexity, overhead, and requires knowledge of protocols and IP subnetting. In addition, there are many non-routable protocols in use. The availability of an inexpensive ethernet LAN bridge now brings back those economies and simplicity for LAN connections that typically use fewer than several hundred computers.




Link and Activity LEDs


One Press button switch used to establish operating mode.

WAN Port

Interface: RS-232, V.24, RS-422/485(4 wire, RS-485 2 wire available with multi-drop firmware) with speeds up to 230,000 bps asynchronous Connector: DE-9P RS-232 (commonly known as a DB-9 PC connector)

LAN Connection

Interface: 10BaseT or 100BaseT

Front view (single port model)

Front view (two port Opto-isolated RS-422/485 model)

Front view (two port model)

Rear view






Download a pdf version of the manual from here.


How to Order

The standard product is shipped for point-to-point use. Specify no-cost multi-point firmware if required.

Need it fast?  Buy on-line or call toll free 800-432-2638!

Item Number Description Price Buy Now!
ESB01-R EtherSeries Bridge with 1 Serial Port (5-30VDC and 120 VAC power supply) $395 Qty:
ESB02-R EtherSeries Bridge with 2 RS-232/422/485 Serial Ports (5-30VDC and 120 VAC power supply) $495 Qty:
ESB02-RI EtherSeries Bridge with 2 Opto-Isolated RS-422/485 Serial Ports (5-30VDC and 120 VAC power supply) $595 Qty:
ESB-MP-FW Optional Mult-Point Firmware for EtherSeries Bridges. All units in a system must have similar firmware! No Charge Qty:
9501033 Optional 36-72 VDC Input Power Supply $ 75 Qty:
9501081 Optional 125 VDC Input Power Supply $ 125 Qty:
9902090 Optional DIN rail mounting clips $ 5 Qty:

Data Comm for Business Inc.
2949 County Road 1000 E
Dewey, Il 61840
Voice: 217-897-6600
Toll Free: 800-4-DCB-NET
Toll Free: 800-432-2638
Email: Contact Page
Fax: 217-897-8023
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EtherPath®, EtherSeries®, EtherPoll®, EtherBridge® and EtherModem® are Registered Trademarks of Data Comm for Business, Inc.