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Contents:

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

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 and Limited Warranty

Glossary

Courier 56K Business Modem Command Reference

Flow Control Template

Hardware Flow Control

The table below lists the Hardware flow control template. To load this template send AT&F1 to your modem.

NVRAM Options
Setting
Description
Handshake option
B0
ITU-T answer sequence
Transmitter
C1
Enabled
Command mode echo
E1
Enabled
Online local echo
F1
Disabled
Speaker volume
L2
Medium
Speaker control
M1
ON during dial through connect
Result codes
Q0
Enabled
Verbal or numeric result codes
V1
Verbal result codes
Result code subset
X7
Extended. Includes all codes except VOICE
Protocol response codes
&A3
Full protocol codes
Serial port rate select
&B1
Serial port rate fixed higher than connect rate
Guard tone
&G0
U.S./Canada
Transmit data hardware flow control
&H1
Hardware flow control
Received data software flow control
&I0
Disabled
Analogue data compression
&K1
Enabled
Normal or leased lines
&L0
Normal lines
Error control/sync
&M4
Normal/error control
Highest Link rate select
&N0
Variable
Pulse dialing type
&P1
U.S., Canada, and other countries
Received data hardware flow control
&R2
Enabled
Data Set Ready
&S0
Always on
Remote Digital Loopback (RDL)
&T5
Deny RDL
Lowest Link rate select
&U0
Variable
Synchronous transmit clock timing source
&X0
Modem
Break handling
&Y1
Clear buffer, send immediately
Synchronous Clock Speed
%N6
9600 bps
Caller ID
#CID=0
Caller ID disabled
Word length*
8
 
Parity*
0
None
DTE rate* (Kbps)
19.2
_

* Detected by each modem from the AT prefix of the &W command that writes your defaults to NVRAM. Set your software to the desired word length, parity, and serial port rate defaults before sending the modem the AT... &W string.


Software Flow control

The table below lists the Software flow control template. To load this template send AT&F2 to the modem. Items in bold denote the changes to (or differences from) the &F1 template.

NVRAM Options
Setting
Description
Handshake option
B0
ITU-T answer sequence
Transmitter
C1
Enabled
Command mode echo
E1
Enabled
Online local echo
F1
Disabled
Speaker volume
L2
Medium
Speaker control
M1
ON during dial through connect
Result codes
Q0
Enabled
Verbal or numeric result codes
V1
Verbal result codes
Result code subset
X7
Extended. Includes all codes except VOICE
Protocol response codes
&A3
Full protocol codes
Serial port rate select
&B1
Serial port rate fixed higher than connect rate
Guard tone
&G0
U.S./Canada
Transmit data hardware flow control
&H2
Software flow control
Received data software flow control
&I2
Enabled
Analogue data compression
&K1
Enabled
Normal or leased lines
&L0
Normal lines
Error control/sync
&M4
Normal/error control
Highest Link rate select
&N0
Variable
Pulse dialing type
&P1
U.S., Canada, and other countries
Received data hardware flow control
&R1
Enabled
Data Set Ready
&S0
Always on
Remote Digital Loopback (RDL)
&T5
Deny RDL
Lowest Link rate select
&U0
Variable
Synchronous transmit clock timing source
&X0
Modem
Break handling
&Y1
Clear buffer, send immediately
Synchronous Clock Speed
%N6
9600 bps
Caller ID
#CID=0
Caller ID disabled
Word length*
8
 
Parity*
0
None
DTE rate* (Kbps)
19.2
_


* Detected by each modem from the AT prefix of the &W command that writes your defaults to NVRAM. Set your software to the desired word length, parity, and serial port rate defaults before sending the modem the AT... &W string.

 

No Flow Control

The table below lists the No Flow Control template. To load this template send AT&F0 to the modem. Items in bold denote the changes to (or differences from) the &F1 template.

NVRAM Options
Setting
Description
Handshake option
B0
ITU-T answer sequence
Transmitter
C1
Enabled
Command mode echo
E1
Enabled
Online local echo
F1
Disabled
Speaker volume
L2
Medium
Speaker control
M1
ON during dial through connect
Result codes
Q0
Enabled
Verbal or numeric result codes
V1
Verbal result codes
Result code subset
X1
Basic
Protocol response codes
&A1
ARQ protocol codes
Serial port rate select
&B0
Variable serial port rate
Guard tone
&G0
U.S./Canada
Transmit data hardware flow control
&H0
Disabled
Received data software flow control
&I0
Disabled
Analogue data compression
&K1
Enabled
Normal or leased lines
&L0
Normal lines
Error control/sync
&M4
Normal/error control
Highest Link rate select
&N0
Variable
Pulse dialing type
&P1
U.S., Canada, and other countries
Received data hardware flow control
&R1
Disabled
Data Set Ready
&S0
Always on
Remote Digital Loopback (RDL)
&T5
Deny RDL
Lowest Link rate select
&U0
Variable
Synchronous transmit clock timing source
&X0
Modem
Break handling
&Y1
Clear buffer, send immediately
Synchronous Clock Speed
%N6
9600 bps
Word length*
7
 
Parity*
1
Even
DTE rate* (Kbps)
9600
_


* Detected by each modem from the AT prefix of the &W command that writes your defaults to NVRAM. Set your software to the desired word length, parity, and serial port rate defaults before sending the modem the AT... &W string.