How to Enable Adaptive Answer on U.S. Robotics V.Everything 56K Modem
ID: Q190659
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The information in this article applies to:
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Microsoft BackOffice Small Business Server versions 4.0, 4.0a
SYMPTOMS
The U.S. Robotics V.Everything 56K V.90 modem may not correctly perform
adaptive answering if the modem is installed using the INF file provided by
U.S. Robotics. The U.S. Robotics 56K V.90 modem may always answer as a fax
modem. Adaptive answering is used to distinguish between an incoming fax or
data call.
CAUSE
The Microsoft Fax server software included with Microsoft BackOffice Small
Business Server has a hardcoded list of modem response strings from modems
that have been successfully tested with Microsoft Fax and adaptive
answering. The U.S. Robotics INF file for the U.S. Robotics V.Everything
V.90 modem may have a different modem response string than the one expected
by Microsoft Fax Server. If the modem response string included in the
modem's INF file does not match exactly the expected value, Microsoft Fax
server will not enable adaptive answering.
RESOLUTION
To resolve this issue, download the latest Courier modem driver from the 3COM Web Site.
WORKAROUND
Before you try to change the INF, make sure that, when installing the
driver for the modem, you had selected the correct option from the list of
modems. The compact disc that accompanies USR modems contains settings and
drivers for several different types of modems and their descriptions may
sound close to what you are installing; however, they may not be exactly
right or match your modem.
In the case of the USR Courier v.everything 56K modem, when you use the
"Have disk" option and read the drivers off of the CD, three manufacturers
are listed on the left.
You should select US Robotics Inc. (the third option) and not 3COM. After
the correct manufacturer is selected, proceed to the description that
exactly matches your modem; for example, Courier V.everything 56K Internal
or External. Be aware that a similar description exists under the 3COM
manufacturers' list, but this will not work properly with the USR modem.
You must edit the modem response string in the U.S. Robotics' INF file to
change the modem response string so that it matches exactly the string that
is expected by Microsoft Fax Server. The list of accepted response strings
is included in the Faxadapt.lst file. This file is located in
C:\Winnt.sbs\System32. The Microsoft Fax server expects the U.S. Robotics
V.Everything modem to have a response string of:
COURIER V.EVERYTHING::U.S. ROBOTICS, INC.::U.S. ROBOTICS, INC.
- You must make the following changes in the INF file provided by U.S.
Robotics. In this example, the assumption is made that the modem is
actually a U.S. Robotics Courier V.Everything External with V.90
firmware.
Original U.S. Robotics Mdmcrv90.inf File:
[Strings]
USR = "U.S. Robotics Access Corp."
Modem1 = "Courier V.Everything EXT PnP (V.90&x2)"
Modem2 = "Courier V.Everything EXT (V.90&x2)"
Modem10 = "Courier V.Everything INT PnP (V.90&x2)"
Modem11 = "Courier V.Everything INT (V.90&x2)"
Modem12 = "Courier V.Everything INT (V.90&x2)"
Modem13 = "Courier V.Everything INT (V.90&x2)"
Modem14 = "Courier V.Everything INT (V.90&x2)"
Modified File to Allow Microsoft Fax to Enable Adaptive Answer:
[Strings]
USR = "U.S. ROBOTICS, INC."
Modem1 = "Courier V.Everything EXT PnP (V.90&x2)"
Modem2 = "COURIER V.EVERYTHING"
Modem10 = "Courier V.Everything INT PnP (V.90&x2)"
Modem11 = "Courier V.Everything INT (V.90&x2)"
Modem12 = "Courier V.Everything INT (V.90&x2)"
Modem13 = "Courier V.Everything INT (V.90&x2)"
Modem14 = "Courier V.Everything INT (V.90&x2)"
- After the file is modified, add the modem using the Modems tool in
Control Panel, but do not let the applet detect the modem.
- Click Have Disk and browse to the directory containing the modified INF
file.
- Select the modem titled Courier V.Everything from the list of modems.
- After the modem is installed, configure RAS and Fax server
appropriately.
MORE INFORMATION
The above procedure was tested and verified on the U.S. Robotics Courier
V.Everything 56K V.90 modem with Supervisor rev 7.3.14 and DSP rev 3.0.13
firmware. The steps may be modified to work with other modems, but
Microsoft has not tested any other modems and can not guarantee the
results.
The third-party products discussed here are manufactured by vendors
independent of Microsoft; we make no warranty, implied or otherwise,
regarding these products' performance or reliability.
Additional query words:
Smallbiz
Keywords : SBS
Version : winnt:4.0,4.0a
Platform : winnt
Issue type : kbprb