USRobotics V.34 user manual Before Installing the Modem

COURIER HIGH SPEED MODEMS

A 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.

Refer to Appendix G. . .

. . . if your modem is installed in a Hewlett Packard system that uses the Ack/Enq communications protocol.

BEFORE INSTALLING THE MODEM

A typical new modem user has a PC with a printer connected to the PC's parallel printer port, and a mouse cable attached to the PC's first serial port. For this user, the modem is the only device that requires a second serial port. If this is your situation, you can skip this entire section except for DIP Switches, just before Installing the Modem. Just remember that after you load your communications software, you'll have to set the software to use the COM2 serial port.

IBM PC-compatible serial ports are referred to as COM ports. Two COM ports are standard: COM1 and COM2. DOS recog- nizes up to four COM ports, although more can be pro- grammed. The Courier is set at the factory to use COM2. This is because many computers are shipped with COM1 equipped with an external serial connector for attaching a device such as a serial printer or serial mouse. If you have one or more of these devices, you're probably already familiar with COM ports on a PC.

3-2 Internal Modem Set Up