Most flash upgrades for the internal 56 data/fax accura modem (hayes) make the modem lock. Both the flex and v90 versions here work, unlike the newer ones which never work. IMPORTANT-> you must use the pins on the modem to force the COM (1-4), and install a generic 56 driver to that COM port. afterwards, you may remove the pins and allow the plug 'n play to configure the modem.
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