Introduction - AOR AR-210 Operating Instructions Manual

AR-210 Manual III

INTRODUCTION

The AOR Model AR-210 Terminal Node Controller is designed as a link between your radio trans-
ceiver and a simple data terminal (or personal computer). This Terminal Node Controller (TNC) al-
lows you to operate new computer-based communications mode – "Packet-Radio". You will find
this unit convenient and easy to use.
The most unique and important feature of Packet-Radio transmissions, unlike RTTY, is that they are
virtually error free. Information that you intend to transmit is first made into digital groups, or
packets. Confirmation of correct reception of these packets is then returned to the originating sta-
tion by the destination station. If the originating station does not receive confirmation, it automati-
cally resends the packets until the correct information is confirmed, or the contact is terminated.
A modem (modulator / demodulator) that can operate at very high baud rates is included in the
unit. This results in very short transmissions by each station and allows several stations to use the
frequency at the same time. Also, due to the choice of operating parameters, you are not aware of
the presence of other stations on frequency.
The unit also functions as an automatic repeater. You may use it as an unattended repeater, a bea-
con or a "mailbox" with the appropriate computer and software. You may also use it with a FSK or
AFSK FM station on the VHF and UHF bands.
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In addition to your radio equipment, you will need either an ASCII data terminal or a personal
computer that has an RS-232C output and uses a terminal emulator program. Such programs are
widely available for connecting your computer to a modem like the Hayes Smart modem. They are
often used to access CompuServe, GEnine o other computer telephone service.
The demonstration terminal software supplied with the AR-210 package is for the IBM PS/2,
PC/XT/AT and compatible computers.
A 9 pin straight computer cable supplied with the AR-210 is for the IBM AT or compatible comput-
ers, but you may need a different cable and connectors if the supplied cable does not fit your com-
puter.
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