Market Central 6000833 User manual

Market Central
www.secureswitch.com
500 Business Center Drive Pittsburgh, PA 15205 USA
412.494.2800 CAGE 1BGJ7
Market Central®is a registered trademark of Market Central, Inc.
4 Port RJ45 Modem Splitter
Part # 6000833

1. Specifications
Power: Non-powered -no power supply required
Size:4.0"W x 2.25"Dx 1.0"H
Weight:6 oz
MTBF >100,000 hours
Altitude Tolerance Any
Temperature Tolerance Operating: 32° to 158° F (0° to 70° C);
Storage: -4° to 185° F (-20° to 85° C)
Humidity Tolerance Up to 95% non-condensing
Interface: RS232
Connectors
(1) single style RJ45 socket connector -(MASTER)
(1) quad style RJ45 connector -(PORT 1 -4)
Leads Supported
Pins 3, 4, 5, 7, and 8 connected straight thru between the MASTER and PORT 1 -4.
Pins 1, 2, and 6 “diode ORed” from PORT 1 -4 to the MASTER port.
.
2. Introduction/Operation
The RJ45 Modem Splitter is designed to permit multiple terminals to share a single modem. The modem
splitter is a passive, non-powered devices and are transparent to data formats, rates & protocols. Data
received from the line and output by the modem as RS232 voltage levels is simultaneously transmitted thru
the modem splitter to all of the terminal devices attached to that modem splitter Likewise, RS232 control
signals output by the modem are simultaneously transmitted to all of the attached terminal devices.
RS232 data output by the attached terminal devices is logically “OR’d” by the modem splitter and then
transmitted to the modem. Because of this, only one terminal device may send data to the corresponding
modem at a time. If more than one terminal device connected to that modem splitter sends data at the same
time, the electrical signals will be combined causing the data going to the modem to be corrupted. The
RS232 control signals output by the terminal devices are likewise logically “OR’d” so that if a control
signal is active on any of the terminal devices (RTS for example), the modem splitter will assert that signal
to the modem. If that signal is not asserted by any of the attached terminal devices, then the modem splitter
will pass thru this inactive state signal to the modem.
This design approach allows the RS232 messages output by the modem to be broadcast to all of the
attached terminal devices, and for the appropriate terminal device to respond to each message. The message
protocol typically includes an identifier so that the terminal devices are able to identify which messages are
addressed to them. When the addressed terminal device is ready to reply, if it uses hardware handshaking it
will assert the RTS signal which the modem splitter transmits via it’s logical “OR”circuitry to the modem.
The modem will respond by asserting the CTS signal which is then broadcast via the modem splitter back
to all the terminal devices including the one that is asserting the RTS signal, thus allowing flow control
regardless of which terminal device is active.

3. Installation
The MASTER port is intended to be connected to a DCE device such as a modem using an RJ45 straight
thru cable and the appropriate RJ45/DB adapter. All other ports are intended to be connected to DTE
terminal devices –again using straight thru cables.
There are no user configurable settings in the RJ45 Modem Splitter. Simply connect your modem or other
DCE device to the MASTER port, and connect the associated terminals or other DTE devices to PORT 1 -
4 on that Modem Splitter. For the GND signal and any signals that flow from the DCE (modem) to DTE
(terminal) direction, use pins 3, 4, 5, 7 & 8 on the RJ45 connectors. For signals that flow from the DTE to
DCE direction use pins 1, 2 and 6. A typical configuration would be to connect the RTS, DTR and TD
signals from the modem and the terminal devices to pins 1, 2 and 6 respectively on the modem splitter
ports, and to connect the RD, GND, RI, DCD and CTS signals from the modem and the terminal devices to
pins 3, 4, 5, 7 and 8 on the modem splitter ports. Once all of the connections have been made, power up
your modems and terminals as normal. The system is now ready for operation
4. Troubleshooting
Verify that all adapters and cables used to connect the modem and the terminal devices to the modem
splitter are pinned correctly. Replace a suspect cable with a known good cable.
Check to make sure that the modem is connected to the MASTER port and that the terminal devices are
connected to PORTS 1 thru 4.
If problems persist, try connecting only one terminal device and the modem to the modem splitter. If
correct operation occurs, then add a second terminal device and so on until the problem recurrs. Note that if
the modem and/or the terminal devices do not output RS232 signals levels that conform to specifications,
you may still be able to achieve reliable operation either by using shorter cables or by changing to a slower
data rate.

Market Central, Inc.
WARRANTY AND LIMITATION OF LIABILITY
Market Central warrants that the products manufactured and sold by it or by one
of its authorized resellers will, when sold, be free of defects in workmanship or material
under normal service and use. Products which have been changed or altered in any
manner from their original design, or which are improperly or defectively installed,
serviced or used, are not covered by this warranty. If any failure to conform to this
warranty becomes apparent during a period of one (1) year after date of sale, Market
Central shall, upon prompt, written notice and compliance by the customer with such
instructions as it shall give with respect to the return of defective products or parts,
correct such non-conformity by repair or replacement of the defective part of parts.
Correction in the manner provided above shall constitute a complete fulfillment of all
obligations and liabilities of Market Central with respect to the quality of said products.
THE FOREGOING WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER
WARRANTIES OF QUALITY, WHETHER WRITTEN, ORAL OR IMPLIED,
INCLUDING, WITHOUT LIMITATION, ANY WARRANTY OF
MERCHANTABILITY OR FITNESS FOR PURPOSE.
THIS WARRANTY AND THE OBLIGATIONS AND LIABILITIES OF MARKET
CENTRAL HEREUNDER ARE EXCLUSIVE AND IN LIEU OF AND BUYER
HEREBY WAIVES ALL OTHER REMEDIES, WARRANTIES, GUARANTIES OR
LIABILITIES, EXPRESS OR IMPLIED, ARISING BY LAW OR OTHERWISE
(INCLUDING WITHOUT LIMITATION ANY OBLIGATIONS OF MARKET
CENTRAL WITH RESPECT TO FITNESS FOR PURPOSE, MERCHANTABILITY
AND INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES OR LOST
PROFITS) OR WHETHER OR NOR OCCASIONED BY MARKET CENTRAL'S
NEGLIGENCE. THIS WARRANTY SHALL NOT BE EXTENDED, ALTERED OR
VARIED EXCEPT BY A WRITTEN INSTRUMENT SIGNED BY A DULY
AUTHORIZED OFFICER OF MARKET CENTRAL.
Market Central, Inc.
500 Business Center Drive
Pittsburgh, PA 15205
USA
www.secureswitch.com CAGE Code 1BGJ7
412.494.2800
Copyright©2011 Market Central, Inc. All rights Reserved

Market Central, Inc.
500 Business Center Drive
Pittsburgh, PA 15205
USA
www.secureswitch.com CAGE Code 1BGJ7
412.494.2800
Market Central®is a registered trademark of Market Central, Inc.
Copyright©2011 Market Central, Inc. All rights Reserved