Tandy DCM212 Operation Manual page 75

Appendix
B
S9 Carrier detect response time
definition
The
value
of
register
S9
determines the length of time
(carrier dura-
tion)
which
the
Modem
takes to recognize the
carrier
tone
and
send
the
CONNECT
result
code.
As
the value
increases,
the
possibility
of
detecting a
false carrier
from
noise
decreases.
The
default
value of S9
is
fixed
at
6 with the
unit
of 1/10 second
(0.6
seconds).
To
change,
input the desired duration
in
the range
1
to 255.
Note:
Do
NOT
confuse S9 with
the
carrier
tone wait
time
defi-
nition, S7.
510 Carrier
loss
time
definition
Register S10 decides
how
long the
Modem
waits for
carrier
before
dis-
connecting
the
line.
When
the
Modem
does not
receive
a
carrier
tone
within the time
fixed
by the S10
value,
it
disconnects the telephone
line.
If
you
set
the value to 255, the
Modem
assumes
the
carrier
is
always
present
and
ignores
carrier detect.
It is
defaulted
to 7
(0.7
seconds).
To
change, input the desired
number
in
the range
1
to 255.
511
Touch-tone
dialing
speed
definition
The
value
of
Sll defines
the duration
and
spacing of the tones during
touch-tone
dialing.
The
default value of Sll
is
70
in units
of
millisec-
onds.
The
minimum
value
for reliable
dialing
is
50
and
the
maximum
value
is
255.
Register Sll
does not
affect
the pulse
dialing speed;
it is
fixed at 10 pps.
512
Escape code guard time
definition
The
value
of S12 determines
the escape code guard
time.
This escape
guard time
is
specified to
20
minimum
and
255
maximum
in units
of
1/50 second.
The
default value
is
50,
that
is, 1
second.
Note: Beware
when
you
are assigning a small guard
time, since
the
guard time should
be
greater
than
the
time
required
to trans-
mit
one
of
the
3
escape
characters.
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