Ring Communications DNB100 User Manual
Page 8
September 2004
DIGITAL NETWORK BRIDGE
DNB100
F8
RING COMMUNICATIONS INC.
Figure F2 - RS422 Bridge Interconnection
J3 - 6 pin (RJ11) RS422 signals :
A two twisted pair installation utilizing RS422 signals can be used to connect two bridges up to 7000
feet apart.
Use a six wire RJ11 cord (BF961) with straight through wiring from J3 to a RJ11 jack (KB161).
Use two twisted pairs between the two RJ11 jacks as shown in Figure F2.
A strap MUST be installed between RTS and CTS of J2 (DB9), in order to disable flow control for
the RS422. To do this, simply place a strap between pin 7 and pin 8 of J2. You could also solder
this strap to a female DB9 connector with solder lugs on the rear, then insert it into the J2 connector.
Figure F2 illustrates the strapping of J2.