User guide

16
Voice Mode for the CDS-9022A and CDS-9052 Cellular Modems
Using voice mode requires DataRemote headset model DRH-HDST for proper
operation. To initiate voice mode from data mode, enter:
AT
OK (response from modem)
AT+CDV<phone number you wish to dial>
You will hear a faint beep over the headset after a few seconds and then ringing.
When called party answers go ahead and talk. If an extension number or other
numerical input is required to complete the connection enter:
ATDT<desired number>
To end the conversation and return to data mode, enter:
ATH
If the landline side hangs up during or at the end of a voice call, the DataRemote
modem will disconnect within 20 seconds and return to data mode automatically.