HP 82718A Expansion Pod Reference Manual page 80

LOW-LEVEL MODEM
III
~CO_M_M_A_N_D
__ DI_C_T_IO_N_A_R_Y __________
~~
This section describes all the low-level modem commands provided by the HP 82718A Expansion Pod.
First, the name of the command is given. The next line lists the syntax of the command and its expected
parameters. An example of the use of the command follows. The description of the command appears
next, and includes any cautions, set off by bullets, that should be observed when using the command.
Finally, a list of possible responses that may be reported by the command is given.
Notes on syntax: Optional parameters are surrounded with brackets ([
D.
All examples assume the
command character is
%.
A (ANSWER)
t'10[lOUT
II
~'~A
II
:~.:CHF.:$':: 1 :::::.
Places the modem in
ANSWER
mode, takes the modem off-hook, transmits the answer carrier tone, and
waits about 20 s for an originate tone. If the modem receives a originate tone before the 20 s expires, the
CONNECT
response is reported. If not,
NO ANS
is reported and the modem goes back on -hook and into
MODEM mode. If the modem receives a carrier that is not in the answer band, it reports BAD ANS, and goes
back on-hook and into MODEM mode.
Responses: 1, 2, B
B
(BREAK)
I
B duration
t'10[lOUT
II
~'~E:
4
II
:~.:CI·-IF~:$'::
1 :::::.
Sends a break (binary zero, or long-space disconnect). The
duration
is a single hex digit
(O-F)
that
specifies the number of 250-ms intervals during which the break will be sent (0-15 intervals, which
equals 0 to 3. 75 s). To send a break longer than 3. 75 s, use more than one B command in the command
string. If the modem is in VOICE mode, the B command will just wait for the duration of the break.
Responses: none
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