🚀 go-pugleaf

I have a Dynamode 56K internal modem (1456VQH-R (INT1)) that does not detect
a dialtone, however with the modem speaker enabled, the dialtone can quite
clearly be heard. The modem is in a Via mvp3, AMD K6-2/300, 64MB system,
motherboard manufacturer unknown. The modem appears to be seated properly
etc. as the windows modem diagnostics works (see below). A second,
identical, modem also doesn't detect a dial tone while connected to this
computer, although both work in a PII 300, BX chipset, 96MB system, on the
same phone line and with all the same cabling.
This obviously suggests either a problem with the motherboard/bios or the
windows installation, although windows 98 has been reinstalled on the AMD
system to no apparent effect.
The modem drivers have been upgraded to version 30.

The windows diagnostic gives the following information:

ATI1    255
ATI2    OK
ATI3    2.1.2.135
ATI4    Rockwell HCF 56K Data, Fax, RTAD, PCI Modem
ATI5    181
ATI6    DP Rev BA
ATI6    V90 SPX Ram Ver 29
ATI6    V90 CTL Ram Ver 29
ATI6    K56FLEX SPX Ram Ver 47
ATI6    K56FLEX CTL Ram Ver 47
ATI7    255

As also noted the motherboard manufacturer is unknown so no flash upgrades
are possible. I have tried searching for the manufacturer on a motherboard
search engine but the BIOS upgrades from the manufacturers given for both
the part number (P5MVP3  AIR) and BIOS number
(08/31/1998-VP3-586B-SMCC-2ASLESHCC-00  Lucky Tech inc(?)) didn't work.

Also after attempting to dial using Dial Up Networking the modem does not
appear to hang up, or as the windows modem diagnostic puts it "Port already
open!". Using a Bitware terminal program and typing ATDT the modem returns
NO DIALTONE.

The modem has worked TWICE before, when first installed a freeserve account
was set up, freeserve was installed of course, and the modem dialled in and
set the account up. However after disconnecting from freeserve the modem
would no longer dial again.
After I messed with the system, removing sound card, moving the modem
around, disabling on board serial ports etc. the modem did dial once more,
but again stopped. Now no amount of messing now seems to get the modem up
and running!

If any one can help me to fix this problem and get the AMD system online I
would be very grateful, thank you.