Re: [TenTec] omni 6+ rs-232 chip failure???

["Stuart Rohre" <rohre@arlut.utexas.edu>]

Loop back testing for standard RS 232 on a 25 pin connector is as follows:
Transmit to Receive, pins 2 to 3; then connect pins 4&5; and another jumper
among 3 pins: 6,8,20.  Since you are looping back, you do not need to use
pin 7, signal ground, nor pin 1 chassis ground.  Now was that looping back
only on the Transceiver connector?  Of course, this is a standard for either
terminal or modem end of a circuit and should cause the appropriate lights
to illuminate in a modem. (or device acting as a modem).
73, Stuart K5KVH