8.2 The Commands
A
Answer (Go Off-Hook)
This command will cause the modem to go off-hook and send an
answer signal to the remote modem.
If the carrier signal is not received by the end of the answering
sequence, the modem disconnects and responds with:
NO CARRIER
If the answer sequence is aborted by dropping DTR, the modem
disconnects and responds with:
ABORTED
If the modem detects dial tone instead of a calling modem, it will
disconnect and respond with:
DIALTONE
/A
RTS Timeout Control
This command allows you to set a timeout facility to automatically
disconnect the modem.
/A0
Timeouts disabled. Default.
/A1
Loss-of-RTS timeout.
/A2
Anti-streaming timeout.
/A3
Loss-of-RTS and anti-streaming timeouts.
/A1
is normally only used with PSTN modems. It causes the
modem to disconnect when RTS goes low for a period held in
register S10.
/A2
is normally used on a leased line where you have a master and
number of slave modems and it is necessary to restrict the time that
any one modem is on-line. After RTS is raised, the modem will
disconnect after the period set in register S56. RTS must be
dropped and re-asserted to cause the modem to go on-line again.
S-register S10 determines the duration of the RTS timeout (S10 is
measured in increments of 1 second or 0.1 of a second, depending on
the setting of the
*B
command). S-register S56 determines the anti-
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