AOpen FM56-ITU/2 Manual page 60

Parameters:
number(not device number) as reflected in response to #VLS=?]
Default:
Result Codes:
connect to the telephone line. (A speaker is such a device, but a telephone line
with speaker ON is not such a device, and generates OK.)
4,or if already off-hook.
Command options:
#VLS?
command as an ASCII decimal value in result code format.
#VLS=? This query requests a report of the device types available
for selection. The response is a series of numbers separated by commas, and
each number indicates a device position number. Currently, device position
numbers do happen to correspond to device type numbers as 0,1,2,3,or 4, but
this correlation is not required (i.e.,0's could be placed in the first few device
position number locations to correspond to multiple telephone line connections.)
#VLS=n where n=0
(Default)
speaker)
and handset
#VLS=0 The default option on the modem. This command instructs
the modem that when entering any of the three voice operating submodes
(Online Command, Transmit, or Receive), that the telephone line interface should
be routed through the modem. The OK response is sent to the DTE, and any
previous connection is lost(i.e.,the modem ends up on-hook as a result of issuing
this command to connect to the telephone line).
#VLS=1 This command instructs the modem to route only the
handset through the modem. This setting can be chosen before recording a
greeting message.
#VLS=2 This command instructs the modem to route only the
speaker through the modem. This setting can Command Mode, and the VCON
response is generated for completeness. However, since this is an output only
device, nothing of consequence can happen until the DTE sends the #VTX
command.
#VLS=3 This command instructs the modem that only the auxiliary
input device (microphone) should be routed through the modem. This setting can
be chosen before recording a greeting message.
#VLS=4 This command is the same as #VLS=0,except that the
modem enables the internal speaker as well as the telephone line/handset
circuit.
n=0,1,2,3,or 4 [This is the device position
OK
This query returns the current setting of the #VLS
1
2
3
4
0
If n=0,1,2,3,or 4
VCON If device selected does not
ERROR If n does not equal 0,1,2,3,or
telephone line with telephone set
transmit/receive device (handset)
transmit only device (on-board
receive only (microphone)
telephone line with speaker on