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Tandy protocol mode operation
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This chapter will give you an idea of what the DCM-7 can do in the Tandy
protocol mode. A Videotex Plus communications package for Tandy's Model
II, 12, 16 and 6000 microcomputers is used in the sample sessions following.
With this software package you can communicate with a variety of informa-
tion services and host computer systems. The examples will help familiarize
you with some of the operations the Modem is capable of performing.
If
you are using an MS-DOS operating system, move directly to the auto
logon session using DeskMate's Telecom in Chapter 3, Hayes protocol mode
operation. XENIX users may want to skip to Appendix D.
For a detailed discussion of all the available commands in Tandy protocol,
refer to Appendix A.
Manual v. automatic operation
When you want to dial an information service (such as CompuServe or Dow
Jones) or communicate with another person whose computer is also using
VIDTEX, set the Modem to manual operation mode. In this mode, you can
control what the system does by manually dialing and answering the phone.
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When you want the DCM-7 to dial a phone number or answer the phone
for you, set it to automatic operation mode. In this mode, the Modem dials
the phone number you store in its memory or answers the phone when some-
one calls you. Automatic mode, for instance, lets you dial the information
service number without picking up the phone - just type the number along
with the proper DCM-7 programming commands on the computer keyboard.
Originate v. answer mode
To place a call to an information service or another person using VIDTEX,
set the DCM-7 to originate mode. In this mode, the call originates from your
computer. When you want to receive a call (answer the phone), set the DCM-7
to answer mode. Note that originate and answer modes can be used either
manually or automatically.
Sample programming sessions
All Modem functions are controlled by ASCII encoded commands that you
send from your computer keyboard. Use the wake-up command* to open
the DCM-7 for programming.
1. Check again that all peripherals are correctly connected and receiving
power.
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