Installation manual
o
o
General
Information
To
establish
a
switched
network
data
connection
in
manual
operation,
you
need
a
telephone:
•
To
call
or
answer
a
call
and
o
To
switch
the
circuit
to
the
modem
to
transfer
the
data.
The
following
applies
for
the
USA
and
Canada:
•
You
must
provide
a
telephone
that
uses
a
modular
jack.
You
should
also
have
the
switched
network
line
terminated
at
your
site.
•
The
Federal
Communications
Commission
(FCC),
Part
68,
Rules
and
Regulations
(July
1979)
also
affect
customer
premises
equipment
(CPE),
such
as
telephones
and
modems.
Part
68
requires
FCC
registration
of
all
CPE
attached
to
the
public
switched
telephone
network.
(It
also
requires
protective
circuits
to
protect
the
switched
telephone
network.)
o
Protective
circuits
can
be
provided
in
two forms.
Some
configurations
use
a
data
protective
coupler,
which
goes
between
an
unprotected
modem
and
the
switched
telephone
network.
More
recently
designed
modems,
such
as
the
IBM
5842,
include
the
protective
circuit
within
the
modem so
that
it
does
not
require
an
external
coupler
..
World
Trade
countries
must
follow
equivalent
regulations.
6-3