USRobotics V.34 user manual YOU should

COURIER HIGH SPEED MODEMS

•If your machine has other than a 25- or 9-pin port, check your computer documentation or consult your dealer to find out what type of RS-232 connector is required.

WARNING: If you're planning to use the high speed computer-to-modem rates of 115.K, 57.6K or 38.4K bps, follow the instructions concerning the RS-232 cable in Appendix B. The guidelines there will help you to avoid signal degradation at very high speeds.

Communications Software. . .

. . .if the modem is attached to a computer instead of a terminal.

The software uses the modem's AT command set to control many communications functions, including configuring the modem, dialing, and answering calls, and also enables the transfer of files and other operations.

Some users prefer their communications software to take control of the modem, and are more comfortable with a program that makes the modem almost transparent. Others prefer a program that allows them to use the modem's AT command set sometimes, and their software at other times, depending on the task at hand.

Review Chapter 4 so that you have a basic understanding of the modem's requirements and operation.

Telephone Adapter. . .

. . .if you have an older telephone installation that does not have the appropriate modular wall jack and plug.

Adapters and RJ11C connectors are available from your telephone company or computer dealer.

YOU SHOULD. . .

Refer to Appendix F. . .

. . .if your phone line is user-installed or if it is leased from the telephone company.

External Modem Set Up 2-3