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This chapter explains how to use new features not covered in the Courier
I-modem Command Reference manual.
Data Over Voice
Data Over Voice (DOV) is a feature that allows the I-modem to make
more cost effective 3.1 kHz analog calls while allowing the I-modem to
send digital data at 56 kbps.
Note: DOV is becoming widely used due to the fact that Regional Bell
Operating Companies usually charge less for analog calls than digital
calls. DOV allows users to pay a lower fee while taking advantage of the
digital transmission.
Protocols Supported by Data Over Voice
You can use Data Over Voice with V.120 and Multilink PPP calls.
Configuring Data Over Voice
Use the following *V2 settings to control Data Over Voice:
To force
V.120 DOV calls
Multilink PPP DOV calls
Incoming analog Multilink PPP
calls through the data port
Other I-modem Features
Other I-modem Features
Use these commands
*V2=0 and S69.5=1
*V2=5 and S69.5=1 and the usual
PPP setting
*V2=5, S69.5=1 and S67.2=1 and
the usual PPP setting
Appendix A
A-1
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