Specifications

4-2 Courier V.Everything External Modem: Getting Started

The Voice/Data Switch

The Voice/Data switch allows you to alternate voice and data

over the same connection. You call the remote user by

telephone, then you each press the Voice/Data switch on the

Courier. After you’re finished sending and receiving files, press

the Voice/Data switch to return to voice.

You can accomplish the same function by sending AT

commands, and you can also assign a different function to the

Voice/Data switch if you don’t plan to use it for alternating

voice and data.

Changing back to voice after the modems connect requires that

both modems have handset exclusion. Handset exclusion means

that when the modem is using the phone line, the modem

automatically disconnects the phone (handset). 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.

If the remote user does not have a Voice/Data switch, he or she

can follow the instructions for using the appropriate AT

command. See the next section for details.

Using the Voice/Data Switch



S32=1, S32=2

Either user can start the call, but you need to decide up front

which modem will originate and which will answer.

Send the modem that will originate ATS32=1 <Enter>

Sending ATS32=1 tells the Courier to go on line and send

ATD <Enter> when you press the Voice/Data switch.

Send the modem that will answer ATS32=2 <Enter>