Product Features

Installing Your Modem

Using the AT Command Set

Upgrading your Modem

Modes of Operation

Dialing, Answering, and Hanging Up

Configuring with DIP Switches

Working with Memory

Controlling Result Code Displays

Controlling EIA-232 Signaling

Accessing and Configuring the Courier 56K Business Modem Remotely

Controlling Data Rates

Dial Security

Flow Control

Handshaking, Error Control, Data Compression, and Throughput

Displaying Querying and Help Screens

Testing the Connection

Dedicated/Lease Line and Synchronous Applications




Alphabetic Command Summary

Flow Control Template

Result Code Meanings and Sets

Technical Information

V.25 bis Reference


Fax Information for Programmers

Viewing LEDs

Regulatory Information and Limited Warranty



Courier 56K Business Modem Command Reference

Controlling Result Code Displays

This chapter contains information about:

Result Code Display Commands

The commands listed below control whether result codes are displayed, and in what format they are displayed.

If you want the modem to
Display result codes.
Do not display result codes.
Do not display result codes while in Answer mode. See the Modes of Operation chapter in this guide for a description of modes.
Display result codes in numeric form.
Display result codes in verbal form.
Display sets of result codes. Refer to the Result Code Meanings and Sets appendix in this guide.

(Default ATX7)

Note: DIP switch 3 overrides the Q0-Q1 setting, DIP switch 2 overrides the Vn setting, and DIP switch 7 overrides the Q2 setting.


Additional Result Code Subsets

Note: ARQ (Automatic Repeat Request) is used in this manual to denote calls that use error control.

For your modem to

NOT display ARQ result codes. This setting pertains only to the display of codes and not to ARQ function.


Display ARQ result codes. If the Courier 56K Business Modem is set to X0 and the connection rate is 1200 bps-56 Kbps, a result code is displayed.

Display modulation indicators (HST, V32, VFC, V34, V90, or V92). If your software cannot handle the added modulation information, select &A1 or &A0.
Display error control (LAPM, HST, MNP, or NONE) and data- compression type (V42 bis, MNP5) indicators.
AT&A3 (Default)

Note: The numeric identifiers for &A3 result codes are the same as those used for &A2. If you request numeric display (V0) and &A3, you won’t be able to distinguish &A2 from &A3 codes. Also, &A3 result codes may not be compatible with some software.


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