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7-2
C
HAPTER
7: C
ONTROLLING
EIA-232 S
IGNALING
Data Set Ready
Under normal conditions, the Business Modem sends a Data Set Ready
(DSR) signal to your computer when it is ready to send and receive data.
CAUTION:
Do not change the default setting of &S0 unless you know
that your installation requires a different setting. Few Windows
communications programs, if any, will require the Business Modem to
control DSR (&S1).
Use the following command to control how the modem sends the DSR
signal.
Example:
Issuing
AT&S3
configures the Business Modem to send a
pulsed DSR signal after sending the Carrier Detect (CD) signal.
For you modem
Command
To send the DSR signal at all times.
AT&S0
(Default)
When originating a call, to send the DSR signal after dialing
when the Business Modem detects the remote analog device’s
answer tone
AT&S1
When answering a call, to send DSR after the Business Modem
sends its answer tone.
AT&S1
After sending Carrier Detect (CD), to send a pulsed DSR signal,
followed by a Clear to Send (CTS) signal. Use this option for
specialized equipment such as automatic callback units.
AT&S2
After sending Carrier Detect (CD), to send a pulsed DSR signal.
AT&S3
To send a DSR signal to your computer at the same time the
Business Modem sends the CD signal.
AT&S4
To send DSR normally (with CTS) after sending CD.
In order to change the DSR pulse time (in 20-second
increments), set S-Register 24. (See Appendix B,
Alphabetic
Command Summary
).
AT&S5
Содержание OfficeConnect 56K Business
Страница 1: ... http www 3com com 3Com OfficeConnect 56K Business Modem Command Reference Published January 1999 ...
Страница 14: ...4 ABOUT THIS GUIDE ...
Страница 32: ...1 18 CHAPTER 1 CONNECTING TO YOUR ISP ...
Страница 42: ...3 6 CHAPTER 3 MODES OF OPERATION ...
Страница 64: ...7 4 CHAPTER 7 CONTROLLING EIA 232 SIGNALING ...
Страница 72: ...8 8 CHAPTER 8 CONTROLLING DATA RATES ...
Страница 80: ...9 8 CHAPTER 9 ACCESSING AND CONFIGURING THE BUSINESS MODEM REMOTELY ...
Страница 96: ...11 6 CHAPTER 11 FLOW CONTROL ...
Страница 108: ...12 12 CHAPTER 12 HANDSHAKING ERROR CONTROL DATA COMPRESSION AND THROUGHPUT ...
Страница 112: ...13 4 CHAPTER 13 DISPLAYING QUERYING AND HELP SCREENS ...
Страница 124: ...14 12 CHAPTER 14 TESTING THE CONNECTION ...
Страница 132: ...15 8 CHAPTER 15 TROUBLESHOOTING ...
Страница 162: ...B 14 APPENDIX B ALPHABETIC COMMAND SUMMARY ...
Страница 168: ...C 6 APPENDIX C FLOW CONTROL TEMPLATE ...
Страница 210: ...14 GLOSSARY ...