T
Tim Thornton
Hello,
We are having problems when we try and put 2 modem drivers
onto 1 COM port.
We need this in two cases: the user may need to attach
different external modems to the COM port (e.g. GSM or
satellitte phone), or he may be using a GSM phone with
GPRS, and because the modem handling for GPRS is different
a different driver needs to be installed. These are laptop
users who cannot add additional COM ports to their
machines.
The user has 2 dial-up networking (DUN) settings, one for
each modem driver. Windows selects the modem driver to use
seemingly at random. If logging is switched on, the log is
also placed in a modem's log file at random. However the
log entry shows which modem driver is being used, and this
is always correct, so we can see when Windows is using the
wrong driver.
Has anyone else experienced this? Anyone got a workaround?
FYI, Windows 98 handles this without any problem, but 2000
said this does not work by design on the MS support pages,
and there is nothing about it in XP. Also, according to
our software engineers, Windows guidelines now stop us
writing our own modem driver to circumvent this problem.
Regards,
Tim Thornton
We are having problems when we try and put 2 modem drivers
onto 1 COM port.
We need this in two cases: the user may need to attach
different external modems to the COM port (e.g. GSM or
satellitte phone), or he may be using a GSM phone with
GPRS, and because the modem handling for GPRS is different
a different driver needs to be installed. These are laptop
users who cannot add additional COM ports to their
machines.
The user has 2 dial-up networking (DUN) settings, one for
each modem driver. Windows selects the modem driver to use
seemingly at random. If logging is switched on, the log is
also placed in a modem's log file at random. However the
log entry shows which modem driver is being used, and this
is always correct, so we can see when Windows is using the
wrong driver.
Has anyone else experienced this? Anyone got a workaround?
FYI, Windows 98 handles this without any problem, but 2000
said this does not work by design on the MS support pages,
and there is nothing about it in XP. Also, according to
our software engineers, Windows guidelines now stop us
writing our own modem driver to circumvent this problem.
Regards,
Tim Thornton