Cabling and Wiring the System
4-18
TI545/TI555 System Manual
4.4
Connecting Modems
The CPU can communicate through Port 1 to an operator interface via
dedicated line or dial-up phone modems. Dedicated line operation is a line
used exclusively to connect the modems. Dial-up phone operation connects
the modems by telephone lines. Refer to Figure 4-12 for a typical
configuration.
NOTE:
The modems must provide an EIA RS-232C DCE interface to the
TI545/TI555 controller and operator interface and must have a built-in V.32
error correction capability.
Although the TI545 and TI555 controllers support both full- and half-duplex
communications, TISOFT only supports full-duplex communications.
RS-232
(9-Pin Port)
TI555
Programming
Device
Modem
Modem
Connect in accordance
with the modem manual
25-9 Pin female adapter,
INMAC 359–4 (or equivalent)
Cable
(2462553–0001)
Cable
(2462553–0001)
25-9 Pin female adapter,
INMAC 359–4 (if needed)
EIA RS-232C
connector
EIA RS-232C
connector
Figure 4-12
Modem Configuration
Overview