Tap in on a serial data
stream and transparently feed another monitor, printer or other device.
Dipswitches on Models 9PCDT and 232CDT allow programming to monitor the
main Transmit and Receive data lines individually or together.
Model 232CDY connects
into all 25 data lines and may be used as a Data Tap or to connect one
PC port to two RS-232 serial devices for simultaneous or intermittent
use.