Black Box Network Hardware 4 Port RJ 45 Modem Splitter RS 232 on RJ 45 User Manual

TL421A  
4-Port RJ-45 Modem Splitter (RS-232 on RJ-45)  
Split data from a single modem to four RS-232  
DTEs.  
Passive, non-powered. Operates transparent to data formats and speeds.  
Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500)  
FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax  
Customer  
Support  
724-746-0746 • Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence,  
PA 15055-1018 • Web site: www.blackbox.com • E-mail: [email protected]  
Information  
 
4-Port RJ-45 Modem Splitter (RS-232 on RJ-45)  
3. Installation  
There are no user-configurable settings in the 4-Port RJ-45 Modem Splitter. Simply  
connect your modem or other DCE device to the Master port, and connect your  
terminals or other DTE devices to Ports 1–4 on the Modem Splitter. For the GND  
signal and any signals that flow from the DCE to DTE direction, use Pins 3, 4, 5, 7,  
and 8. For signals that flow from the DTE to DCE direction, use Pins 1, 2, and 6. A  
typical configuration would be to connect RTS, DTR, and TD to Pins 1, 2, and 6  
respectively, and to connect RD, GND, RI, DCD, and CTS to Pins 3, 4, 5, 7, and 8.  
Once all the connections have been made, power up your modem and terminals as  
normal. The system is now ready for operation.  
Page 3  
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About Black Box  
Black Box provides an extensive range of networking and infrastructure products.  
You’ll find everything from cabinets and racks and power and surge protection  
products to media converters and Ethernet switches all supported by free, live 24/7  
Tech support available in 30 seconds or less.  
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are registered trademarks of BB Technologies, Inc. Any third-party trademarks appearing in this white paper  
are acknowledged to be the property of their respective owners.  
TL421A, version 2  
724-746-5500 | blackbox.com  
 

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