US Robotics COURIER User Manual page 154

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COURIER HIGH SPEED MODEMS
VOICE/DATA
The voice/ data switch is located on the modem's front panel.
While the switch's primary function is to toggle back and forth
between voice and data communications, this new feature also
allows you to perform other functions at the touch of a switch.
Set Register S32 for any one of the functions, and change that
function any time you wish.
Additionally, a new feature of the Courier modem allows you to
use the voice/ data switch to set the modem for remote configu-
ration. This is described in the next section of this appendix,
Remote Access.
NOTE: Use the voice/ data switch when the modem is in
Command mode (offline). If you press the switch while the
modem is online, the modem hangs up and returns a NO
CARRIER result code.
VOICE/DA TA OPERA TIONS-S32= 1, S32=2 OR AT COMMANDS
When you assemble the Courier, you have the option of plug-
ging your phone into the second modular jack of the modem so
it's available for voice calls. You can also switch between the
phone and modem during a call.
Users of Courier modems have always been able to phone and
make arrangements with another user before turning control of
the call over to the modems. However, it was difficult to switch
from data to voice. Now, if the remote modem has handset
exclusion, you can change from voice to data and back again,
with or without issuing a command.
Handset exclusion means that if the modem is using the phone
line, your phone (handset) is automatically disconnected.
However, if you keep the handset off hook, once you hang up
the modem the handset takes over the phone line and you can
use voice communications again. If the remote user does not
have handset exclusion, you may not be able to switch back to
voice mode successfully once you have switched to data mode.
The following instructions begin with toggling voice/ data
communications with the switch. These are followed by
instructions for doing the same thing with AT commands. Keep
Fax and Other Operations E-3