Corn
rn
and reference
When CO is entered, the transmitter is switched OFF and remains OFF until
C1 or reset command
Z
is entered.
As
long as the transmitter is OFF, the
Modem will not issue carrier even when it detects the answer modem’s carri-
er tone during originate mode operation. For further information, refer to
Data line monitoring
in later in this chapter.
H, h Hook switch control
Controls the hook switch of
a
telephone. The
HO
setting is comparable
to
the condition of the handset resting on the hook while the telephone line
is not in use. In the H1 setting, the handset is off the hook and the telephone
line is in use.
Use the
HO
setting for normal operation. When originating or answering calls,
the Modem controls the off hook condition automatically.
M,
m Speaker control
Controls the built-in speaker. Use M1 (default) to monitor a call in progress.
You can monitor signals on the telephone line such as a dial tone, ring-back
tone, busy signal and carrier tone. The speaker turns OFF when the Modem
recognizes
a
carrier signal and sends
a
CONNECT result code.
When you want to continue monitoring the data communication, use M2
instead of M1. Or, input MO if you do not want to use the speaker function
at all.
Registers
so
The value
of
register
SO
determines the number of times the phone will ring
before the Modem answers a call. Input any decimal number greater than
0
to set the Modem to auto-answer mode. If the value is set to
0,
the Modem
will not answer
a
call. Since the default value of
SO
is preset at
0,
use the
prescribed syntax (refer to
Command syntax
in Chapter 2) to change the value
when you use the Modem in auto-answer mode.
When DIP Switch
6
is OFF, the Modem will power-up in always auto-answer
mode with
SO
=
1. Answer command
A
disregards the
SO
value since it enters
answer mode immediately.
Defines the rings
for
answering a call
s1
Counts the rings
The value
of
S1
increases each time the phone rings and clears if no rings
occur within about 8 seconds of the last ring. This will operate only if the
value
of
SO
is greater than
0.
32
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