Low-Level Modem Command Dictionary - HP 82718A Expansion Pod Reference Manual

Low-Level Modem Command Dictionary
C (COUNT)
I
C
ring count
t'10DOUT
II
~·~C 2
II
:~.:CHF.:$':: 1 :::)
Sets the
ring count.
The
ring count
is a single hex digit
(a-F)
that specifies either the number of
rings (0-15) to wait before answering an incoming call, or the number of rings to wait before aborting a
dialing operation. The
ring count
is set to
a
when the modem is initialized, and its current value is
preserved while the modem is off.
If the modem is on-hook and in MODEM mode, it will answer an incoming call after
ring count
rings.
After each incoming ring, the modem will report RING IN and OK. After
ring count
rings have been
detected, the modem will automatically report RING IN, go off-hook (i.e., answer the incoming call, and
enter ANSWER mode. The behavior at this point is as if the A (ANSWER) command was executed. See the
A command for details.
If
ring count
is zero, the modem will be ORIGINATE-ONLY when in MODEM mode; each incoming ring
will be reported, but the incoming call will not be answered. Only if
ring count
is a number other than
zero will the modem be AUTO-ANSWER when in MODEM mode, and answer the incoming call.
If the modem is on -hook and in VOICE mode, it will not answer incoming calls. However, after each
incoming ring, the modem will report RING IN and OK, regardless of the value of
ring count.
The P
(PICKUP) command can be used to answer the incoming call in VOICE mode.
While the modem is counting incoming rings, any command sent to the modem will cause the modem to
restart counting incoming rings (in effect, extending the
ring count).
The
ring count
is also used when dialing. When dialing, the modem will wait
ring count
+ 4 rings
before aborting the dialing operation. Refer to the D (DIAL) and R (REDIAL) commands.
Responses: none
D (DIAL)
I
D
[dial string]
t'10DOUT
II
\D I
9~'J
1':: :::00) 555-1212
II
:U=:HF~:$'::
1:::::'
Takes the modem off -hook and dials a sequence of numbers. If you have already stored a dial string
using one of the the three D, R (REDIAL), or X (XMIT), the string is an optional parameter; the
D
command will dial the most-recently entered dial string. If no dial string has been stored since the
modem was last turned on or initialized, or if the last dialing command containing a dial string was
aborted, the dial string is a required parameter.
A dial string can contain any number of characters, but only the first 32 recognized characters will be
dialed or stored. The dial string recognizes several special characters, listed below. All other characters
are ignored except for the characters related to low -level command strings:
' a s
(backspace-ASCII 8 or
control-H),
g~~
(cancel-ASCII 24 or control-X), comma, and carriage return .......... .
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