Contents:

Connecting to your ISP

Using the AT Command Set

Upgrading your Modem

Modes of Operation

Dialing, Answering, and Hanging Up

Working with Memory

Controlling Result Code Displays

Controlling EIA-232 Signaling

Accessing and Configuring the Courier 56K Corporate 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

Troubleshooting

Appendixes

S-Registers

Alphabetic Command Summary

Flow Control Template

Result Code Meanings and Sets

Technical Information

V.25 bis Reference

ASCII Chart

Fax Information for Programmers

Viewing LEDs

Regulatory Information

Glossary

Courier 56K Corporate Modem Command Reference

Displaying Querying and Help screens

This chapter contains information about:

Note: To view screen captures of the help screens in the following chapter, refer to the Alphabetic Command Summary appendix in this guide.

Overview

The Courier 56K Corporate modem can display information such as the current settings, product code, and call duration.

Common Inquiry Commands

For your modem to display
Command
Current settings
AT14
NVRAM settings
AT15
Link diagnostics summary
AT16


Querying

Here is a complete list of ATIn commands.

For your modem to
Command
Display a four-digit product code.
ATI0

Perform a checksum of the modem’s read-only memory (ROM) and display the results. (This function is used only in factory testing.)

The Courier 56K Corporate modem should always display the same number unless the flash has been updated.

ATI1
Perform a test of the modem’s random-access memory (RAM) and display either OK (0) or ERROR (4), followed by OK when the test is completed. You may want to use this command if the Courier 56K Corporate modem appears to be malfunctioning.
ATI2
Display the Courier 56K Corporate modem’s banner, or product title.
ATI3
Display the Courier 56K Corporate modem’s current configuration.
ATI4
Display the configuration saved in nonvolatile random access memory (NVRAM). If your Courier 56K Corporate modem connects to a device that has Dial Security and local access enabled, you cannot view the stored phone numbers.
ATI5

Display a diagnostic summary. During a connection, the Courier 56K Corporate modem monitors and stores information about link operations. When the call is ended, you can request a diagnostic summary.

The duration of the last call or the real time is displayed, depending on the modem clock setting.

For calls under data compression, the number of characters sent may be less than the number of octets sent, due to data compression operations.

ATI6
Display the product configuration.
ATI7
Lists phone numbers with redial instructions.
ATI8
Displays modem’s Plug and Play ID.
ATI9
Display the Dial Security Account Status. For security administrators only, unless local security is disabled (S53=0 or S53.2=0)
ATI10
Display a connection report that USRobotics Technical Support representatives use to help you solve problems.
ATI11

Display caller ID information from the current call (if in progress) or the last call (if between calls).

The caller ID information remains until either the modem is reset or until the modem receives another valid caller ID signal.

ATI15
Display a connection report that USRobotics Technical Support representatives use to help you solve problems.
ATI16
Display a connection report that USRobotics Technical Support representatives use to help you solve problems.
ATI17

 

Displaying Help


The Courier 56K Corporate modem provides six Help, or command summary, screens: basic AT command set, ampersand (&) command set, percent (%) command set, dial command options (D), S-Registers (S), and the octothorpe (#) command set.

Note: Help screens are not available when a modem makes a synchronous connection using &M6 or &M7.

For your modem to display Command
A partial summary of the basic command set AT$
A partial summary of the ampersand command set AT&$
A partial summary of S-Register functions ATS$
A partial summary of percent command set AT%$
A summary of the octothorpe command set AT#$
Help screen for dial commands ATD$

Note: To see the remainder of the screen for any given command, press any key.