Problems That Occur Before Connecting
15-3
Double characters are appearing on your monitor
This is a signal that both the Business Modem's local echo and your
software's local echo are on.
Type the command to turn off your online echo (ATF1) or turn your
communications software's local echo off (refer to your software's
documentation).
After you dial, the Business Modem reports NO CARRIER and then hangs up
■
Try increasing S7 and decreasing S9 to allow more time for the
connection.
■
Try calling a different device. If you are trying to connect to an older
modem at 2400 bps or less, it may not support error control. Try
sending AT&M0, and then try the call again. Reset the Business
Modem (send ATZ) after you finish the call.
Hear ringing but the Business Modem won't answer
■
Look at the TR LED to make sure that your terminal or computer is
sending a DTR signal via the EIA-232 interface.
■
Send ATI4 to the Business Modem and check that S0 is set to a value
higher than 0.
■
Set &F1 and S0=1, then try again.
The Business Modem acts as though a data link has been established, but no call was
received,
Carrier Detect (CD) may be overridden (with &C0), but your system may
require that the override be turned OFF (with &C1). Review your
communications software manual to see what CD operations are
required.
The Business Modem behaves as if <Enter> were pressed when you don't press any keys
Your software may be misreading signals from the Business Modem when
the Business Modem sends a Carriage Return and a Line Feed before and
after the RING and CONNECT messages. Sending the Quiet mode
command, ATQ1, should solve the problem.
Содержание U.S. Robotics 56K Voice
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...