Radio Shack Modem I TRS-80 Owner's Manual page 3

Introduction
The
Modem
I
is
a self-contained,
fsk (Frequency
Shift
Keying)
telephone
interface.
It
enables your computer
to
communicate
with other computers
via
ordinary telephone
lines.
The
Modem
I is
compatible with
all
trs-80
models
(except
Level
I
versions of the
Model
I
and Model
III)
and
with other
rs-232
c
standard devices.
Its
special features include:
•
Sends/receives
at
0-300 baud
for compatibility with
most
time-shared
computer
systems.
•
Selectable originate/answer
mode
for
operation
in
"remote"
or
"host"
terminal applications.
•
Full
duplex operation allows simultaneous communication between modems.
•
Direct (non-acoustic)
connection
to
phone
lines helps ensure
a
low
error
rate.
•
NORMal/CASsette switch
lets
you
use
rs-232-c
equipped computers and
trs-80
Model
I
Level
II
computers which do
not
have
an
rs-232~c interface. Select
norm
for rs-232-c use;
cass
for
use with
the cassette interface
of
Model
I
Level
II
Computers.
Cassette use requires optional/extra "Cassette-Comm"
software (Radio
Shack
Cat.
No.
26-1139) and
a cassette cable (26-3009).
•
Bell 103
compatible.
Note:
When
using
the
Cassette
Comm
software, communications
will
not be
in
a true
full
duplex mode.
For
further details, see the Cassette
Comm
instruction
manual.
Important Note
Before connecting your
Modem
I
to the
phone
lines,
you must
notify
your
local
telephone
company
of the:
Manufacturer: Radio Shack
Model:
Modem
I,
#26-1172
USOC
Number: RJ11C
FCC
Number: AA099R-69525-DM-N
Ringer Equivalence
Number
(REN): 0.0B
This information also appears on
the bottom
of
the
Modem.
The
Modem
I
must
not be connected
to:
[x]
Coin-operated
phones
[x]
Party-line
phones
[x]
Multiple-line
phones
Modem
I
Owner's Manual:
Copyright
©
1981
Tandy
Corporation.
All rights
reserved.