Synxcom SM9234D, Руководство пользователя

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AT Commands
Page 73
This command may not be permitted in some countries.
Result Code
OK
A - Answer
The modem will go off-hook and attempt to answer an incoming call if correct
conditions are met. Upon successful completion of answer handshake, the modem
will go on-line in answer mode. This command may be affected by the state of Line
Current Sense, if enabled. (Most countries do not require Line Current Sense.)
Operation is also dependent upon +FCLASS command and country-specific
requirements.
If +FCLASS=0 is selected, the modem will enter the connect state after
exchanging carrier with the remote modem. If no carrier is detected within a
period specified in register S7, the modem hangs up. Any character entered during
the connect sequence will abort the connection attempt.
If +FCLASS=1, 1.0, or 2 is selected, the modem will go off-hook in V.21 answer
mode. It will generate the V.21 2100 Hz answer tone for 3 ± 0.5 seconds and,
following a delay of 70 ms, will proceed as if the +FTH=3 command were issued.
At any stage up to (but excluding) the +FTH=3 command state, any character will
abort the communication. (See the description of the +FTH command for details.)
H - Disconnect (Hang-Up)
This command initiates a hang up sequence.
This command may not be available for some countries due to PTT restrictions.
Syntax H<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 The modem will release the line if the modem is
currently on-line, and will terminate any test (AT&T)
that is in progress. Country specific, modulation
specific, and error correction protocol specific (S38)
processing is handled outside of the H0 command.
1 If on-hook, the modem will go off-hook and enter
command mode. For US models, the modem will
remain off-hook. For W-class models, the modem will
return on-hook after a period of time determined by
S7.
Result Codes
OK <value> = 0 or 1
ERROR Otherwise.