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

Viewing LEDs

This appendix explains how to view the twelve LEDs on the front of your Courier 56K Corporate modem.

This LED
Status
Means your Courier 56K Corporate modem
HS
On
Has made a 4800 bps or faster connection. Once this light is on, it remains on until reset. This can be configured with S69.
Off
Has not made a 4800 bps or faster connection since last reset
AA
On
Is ready to accept calls
Blinking
Has detected an incoming call
Off
Is not ready to accept calls
CD
On
Has detected a carrier from a remote device or carrier detect has been forced on (using DIP switch 6)
Off
Has not detected a carrier
OH
On
Has control of the line
Off
Does not have control of the line
RD
Flashing
Is sending data to your computer
Off
Is idle
SD
Flashing
Is receiving data from your computer
Off
Is idle
DTR
On
Has received a Data Terminal Ready (DTR) signal from your computer, or DTR is forced on (using DIP switch 1)
Off
Has not detected DTR
MR
On
Is powered on
Flashing
Is retraining with a remote device or is in Test mode
Off
Is powered off
RTS
On
Has detected the Ready to Send (RTS) signal from your computer
Off
Has not detected the RTS signal from your computer
CTS
On
Is sending your computer the Clear to Send (CTS) signal
Off
Is not sending your computer the CTS signal
SYN
On
Is in synchronous mode
Blinking
Has activated Dial Security
Off
Is not in synchronous mode/Dial Security not active
ARQ/FAX
On
Is using V.42 bis error correction
Flashing
Is retransmitting data to the remote modem
Blinking
Is in fax mode
Off
Is not using error control, not retransmitting data, and not faxing