This section includes information on using nonsupported modems
and modifying your modem configuration file, MODEMS.INF, which contains
information describing each modem type supported by RAS. You should
not modify this file except to add sections for modems that are
not already supported.
Understanding MODEMS.INF |
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The MODEMS.INF file lists all the modems supported by RAS,
along with the initialization, dial, and listen command strings
each modem needs for correct operation. When you select a modem
during RAS installation, the Setup program associates the selected
modem with the specified communication port. RAS connection utilities
read MODEMS.INF to obtain the command strings for the modem associated
with each communication port.
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 | NOTE: The MODEMS.INF file is different for MS-DOS client workstations
than for Windows NT workstations or Windows NT
Advanced Servers. Use the MODEM.INF information in this chapter,
rather than the information in the Windows NT manuals,
even if you are connecting to a Windows NT network. |
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The MODEMS.INF file consists of two main parts:
Individual sections for each supported modem
The [default] section contains command
strings shared in common by most supported modems. The sections
for individual modems contain command strings that differ from those
in the [default] section.
The following MODEMS.INF listing includes introductory comments,
the complete [default] section, and two sample
sections for particular modems.
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#-----------------------------------------------------------------
# Some normal commands used. Where the commands are different for a
# particular modem, the new/different commands are listed under the
# section for that specific modem.
#-----------------------------------------------------------------
# &F Recall factory settings
# L1 Low speaker volume
# &C1 Track presence of data carrier
# &D2 Hang up and disable autoanswer when DTR goes from ON to OFF
# Q0 Modem returns result codes
# V1 Verbose (English words) return codes
# E1 Enable character echo in command state
# S7 Wait time for carrier
# &Q0 Async connection
# S0 Answer on ring number
# S2 Escape character
#-----------------------------------------------------------------
[Default]
MAXBAUD = 2400
[Default.INIT]
[Default.INIT.COMMAND]
COMMAND = AT&F &C1 &D2 Q0 v1 S0=0 S2=128 S7=55*cr
[Default.INIT.RESPONSE]
OK = *cr*lfOK*cr*lf
ERROR = *cr*lfERROR*cr*lf
[Default.LISTEN]
[Default.LISTEN.COMMAND]
COMMAND = *cr*ATS0=1*cr
[Default.LISTEN.RESPONSE]
OK = *cr*lfOK*cr*lf
ERROR = *cr*lfERROR*cr*lf
[Default.LISTEN.RESPONSE]
LOOP = *cr*lfRING*cr*lf
CONNECT = *cr*lfCONNECT*blank*baudrate*cr*lf
NO_CARRIER = *cr*lfNO*blankCarrier*lf
[Default.DIAL]
[Default.DIAL.COMMAND]
COMMAND = ATDT*phonenumber*cr
[Default.DIAL.RESPONSE]
CONNECT = *cr*lf
CONNECT*blank*baudrate
CONNECT = *cr*lfPLEASE*blankSET*blankTO*blank*baudrate*cr*lf
CONNECT = *cr*lfCONNECT
ERROR = *cr*lfERROR*cr*lf
LOOP = *cr*lfRINGING*cr*lf
NO_CARRIER = *cr*lfNO*blankCARRIER*cr*lf
NO_CARRIER = *cr*lfVOICE*cr*lf
NO_DIALTONE = *cr*lfNO*blankDIAL*blankTONE*cr*lf
NO_DIALTONE = *cr*lfNO*blank*DIALTONE*cr*lf
BUSY = *cr*lfBUSY*cr*lf
NO_ANSWER = *cr*lfNO*blankANSWER*cr*lf
#-----------------------------------------------------------------
[Hayes_V_Series_9600]
# &Q5 -- Error control connection
# S36=1 -- Fallback to async, no speed buffering
MAXBAUD = 9600
[Hayes_V_9600.INIT]
[Hayes_V_Series_9600.INIT.COMMAND]
COMMAND = AT&F &C1 &D2 Q0) V1 S0=0 S2=128 S7=55 &Q5 S36=1*cr
[Hayes_V_Series_9600.INIT.RESPONSE]
OK = *cr*lfOK*cr*lf
ERROR = *cr*lfERROR*cr*lf
#-----------------------------------------------------------------
[Intel_9600EX]
# \N1 Direct Mode
# Command line length cannot exceed 40
MAXBAUD = 9600
[Intel_9600EX.INIT]
[Intel_9600EX.COMMAND]
command = AT&F&C1&D2 V1 S0=0 S2=128 S7=55 &Q0 \N1*cr
[Intel_9600EX.INIT.RESPONSE]
OK = *cr*lfOK*cr*lf
ERROR = *cr*lfERROR*cr*lf
#----------------------------------------------------------------- |
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In the MODEMS.INF file, a pound sign (#) preceding a line
indicates a comment, which the Setup program ignores. Asterisks
(*) are escape characters that precede macros. These macros and
the functions they perform are listed in the following table:
When you select a modem during RAS installation, the Setup
program looks for a section with the name [modemname.INIT]. If it
does not find one, it uses the initialization strings defined in
the [default] section.
For example, the Hayes Smartmodem 2400™ uses the
same set of command strings as listed in the [default]
section. Therefore, the only line in the [Hayes_Smartmodem_2400]
section is the MAXBAUD line.
#-----------------------------------------------------------------
[Hayes_Smartmodem_2400] MAXBAUD = 2400 |
The Intel_9600EX modem, however, uses different initialization
strings from those shown in the default section. Therefore, these
strings are defined separately in the [Intel_9600EX]
section.
#-----------------------------------------------------------------
[Intel_9600EX]
# \N1 Direct Mode
# Command line length cannot exceed 40
MAXBAUD = 9600
[Intel_9600EX.INIT]
[Intel_9600EX.COMMAND]
command = AT&F&C1&D2 V1 S0=0 S2=128 S7=55 &Q0 \N1*cr
[Intel_9600EX.INIT.RESPONSE]
OK = *cr*lfOK*cr*lf
ERROR = *cr*lfERROR*cr*lf
#----------------------------------------------------------------- |
Because the Intel_9600EX modem uses the LISTEN and DIAL strings
listed in the [default] section, only the
INIT strings need to be listed in the [Intel_9600EX]
section.
If a modem's command strings are identical to those already
listed for another modem, the name of the latter modem can be used
as an alias for the former. For example, the MODEMS.INF section
for Hayes_Ultra reads:
#-------------------------------------------------------------
[Hayes_Ultra]
MAXBAUD = 9600
Alias=Hayes_V_Series_9600 |
The Alias line tells the Setup program that the Hayes Ultra
modem uses the same command set as the Hayes V Series 9600 modem.
Adding a New Modem to MODEMS.INF
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| NOTE: Microsoft Product Support Services only supports the
version of MODEMS.INF that ships with Microsoft LAN Manager
Remote Access service. If you modify the file and your new modem
does not work, restore the original version of the file, and use
one of the modems listed earlier in this appendix. |
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If you are using a modem that is not explicitly supported
in MODEMS.INF, you can append a new section containing the command
strings required by your modem. The name of the section should be
the name of your modem and should be enclosed in brackets. If the
[default] section does not contain the command
strings required by your modem, use the macros defined in the preceding
section to define new ones. Examples of their use are shown in the
listing of the MODEMS.INF file.
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| NOTE: When adding a new section to MODEMS.INF, append it to
the end of the file, rather than inserting it somewhere in the middle.
This precaution reduces the chances of inadvertently corrupting
existing entries. |
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To modify MODEMS.INF for a new modem
Back up your existing MODEMS.INF file.
Type the section title, using the format [modemname].
Add a MAXBAUD line listing the modem's maximum baud
rate. This is the computer-to-modem speed, not the modem-to-modem
speed.
*May vary depending on CPU speed, memory speed, software running,
and other factors.
Check to see if the [modem_name.init]
section for the modem needs to be different from the one listed
in the [default] section. If it does, then
add an [init] section to the section for the new modem, below the
MAXBAUD line.
If you changed the [modem_name.init]
section, then repeat the previous step for the [modem_name.listen]
and [modem_name.dial] sections. Normally,
you should not have to change these sections.
Being meticulous when you create a new modem section can save
debugging time later. It is recommended that you document your work
so that others can quickly understand the entries in case you are
not available, or so you can remember a year later what you did
and why you did it. Be sure to type a pound sign (#) at the beginning
of each comment line.
The following macros can be used in the MODEMS.INF file:
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