Paradyne 3821PLUS manual Fax Operation

Fax Operation 5

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1Fax Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Overview

The procedures for sending and receiving facsimile documents with your modem depend on the fax software you use. This chapter does not contain specific procedures, but rather information that may make it easier for you to use the documentation that came with your fax software.

•You must have configured your modem according to the specifications of your fax software manual. For example:

ÐSome fax software requires that the modem have Auto-Answer disabled. You can set this with the ATS0=0 command.

ÐSome fax software requires that the modem use software flow control. You can set this with the AT \Qn command.

Fax Operation

Your modem, in combination with your computer and fax software, is capable of emulating the functions of a fax machine. You can use it to send and receive fax files in communication with another fax modem, or with a standard fax machine. These fax files are images turned into the sort of data that can be stored in your computer.

Fax machines and fax modems use special protocols different from those used by standard modems. The device you intend to communicate with must be compatible with your modem, which means that it must be capable of using the same protocol. Your 3821Plus modem supports Class 1 (EIA 578) and Class 2 (EIA/TIA SP-2388) Group III fax, using V.17, V.29, or V.27ter modulations.

Before you can send or receive a fax, the following must be true:

•Your modem must be online with a compatible fax modem or fax machine.

•You must have fax software installed on your computer.

ÐDTR Action should be set for standard RS232-D operation. Use the AT&D2 command.

ÐLSD (Line Signal Detect) Control should be set for standard RS232-D operation. Use the AT&C1 command.

If your fax software requires that you change the configuration of your modem, see the appropriate sections of Chapter 4, AT Commands and S-Registers.

Your fax software uses AT commands to tell the modem what to do. These commands, and the replies your modem makes (such as ªOKº), may be displayed on your computer terminal during fax operation, but this depends on your software. You do not have to issue AT commands yourself, unless you use AT commands to configure the modem.

For more information about fax operation, see the manual that came with your fax software.

3821-A2-GB20-40 January 1999 5-1