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 will hang up. Any character entered during the connect sequence will abort the
connection attempt.
If +FCLASS=1.0 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. Following a delay of 70 ms, it
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.
1 If on-hook, the modem will go off-hook and remain in command mode.
Result Codes
OK <value> = 0 or 1.
ERROR Otherwise.
O - Return to On-Line Data Mode
This command specifies that the modem will enter the on-line data mode from the on-line
command mode with or without a retrain. If in the off-line command mode when this
command is entered, the modem reports ERROR.
Syntax
O[<value>]
Defined Values
<value> Decimal number corresponding to the selected option.
0 Enters on-line data mode from the on-line command
mode without a retrain. Handling is determined by
the Call Establishment task. Generally, if a
connection exists, this command connects the DTE
back to the remote modem after an escape (+++).
1 Performs a retrain then enters on-line data mode from
the on-line command mode.
Result Codes
OK <value> = 0 or 1 and a connection exists.
ERROR Otherwise or no connection exists.
L - Speaker Volume
This command sets the speaker volume control according to the parameter supplied.
Syntax
L[<value>]
Defined Values
<value> Decimal number corresponding to the selected option.
0 Off.
1 Low volume. (Default.)
2 Medium volume.
3 High volume.
Result Codes
