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11.. . APPENDIX K: MODEM CONFIGURATION
USING THE OMP-MODL 11-133
APPENDIX K: MODEM CONFIGURATION
SUPPLEMENT
As modem initialization is never as easy as it should be, this appendix was written
to provide additional assistance in the configuration of modems for communication
between the PC (equipped with the LOCAL modem) and the OMP-MODL (equipped
with the REMOTE modem). Four different configurations with 2400 baud and 14.4
Kbaud modems are provided for general reference (also see modem material
covered in Chapter 5).
Obviously, other combinations will exist, however, it is hoped that some
understanding of the setups can be gleaned from the following examples and
explanations to make life easier. Intelligent experimentation is commonly the best
method for modem configuration... however, after experimentation, if a reliable
connection can’t be implemented, please call our technical support group for
additional assistance.
Modem commands beyond the basics are not standardized and have evolved over
the years as different manufacturers have implemented more advanced features.
Hence, standard commands can’t be supplied for the plethora of modems available
on the market today. The following short list of commands is fairly consistent
between modems:
AT Attention command
&F0 Use factory defaults settings 0 (common usage)
&F1 Use factory defaults settings 1 (also common)
E0 Turn off local Echo of commands
Q0 Enable Result Codes
V1 Use Verbal Result Codes
Local 2400 to Remote 2400 (MDM-2400 Modem Option)
Within the HyperWare Modem Communication Dialog Box, set:
Baud Rate: 2400
Initialization String: AT&F0E0Q0V1 or AT&F1E0Q0V1.
This sets the local modem to its factory defaults (F0 or F1) and then
turns Echo Off and enables Verbal Result Codes. (No error
correction or compression is used in 2400 Baud modems so no
additional settings are required to configure those features in the
Initialization String box).
Local 2400 to Remote 14.4 (MDM-14.4 Modem Option)
Within the HyperWare Modem Communication Dialog Box, set:
Baud Rate: 2400
Initialization String: AT&F0E0Q0V1 or AT&F1E0Q0V1.
This sets the local modem to its factory defaults (F0 or F1) and then
turns Echo Off and enables Verbal Result Codes (usually two
commands, one to Enable Result Codes and one to select Verbal
rather than numeric). (No error correction or compression is used in