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IV PROGRAMMING
Programming the Model 748 is designed to be straight forward and user friendly. All programming
is done with menu driven prompts, in plain English. You may find that you don't even need the
manual! You can connect to a Model 748 for programming either locally through the RS-232 port or
remotely using the internal modem. All system and user programming is done with a terminal or
computer running terminal emulation software. The terminal or computer software must be capable
of supporting ANSI terminal codes or VT102. The 748 uses ANSI escape sequences for cursor and
screen control.
The local RS-232 port is valuable for initial test and adjustment, as well as general purpose
programming and monitoring. The Model 748 is a “program while operate” device. You can do
programming and device upload / download without taking the unit out of service. When using the
internal modem, the phone line is also in use, but dispatch activity is unaffected.
The Model 748 may be connected directly to an RS-232 terminal or computer when the equipment is
co-located. When this is not possible, the Model 748's internal modem may be used.
Office computer
or CRT terminal
with RS-232 port
Modem, can
be internal to
computer
Outside phone
line
Site phone line
Model 748 with internal modem
OFFICE
REPEATER SITE
Figure 4. Typical Modem Programming Arrangement
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