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.