[cisco-voip] VG224 with modem connection

[Robin H]

I need to access my user's PC for troubleshooting remotely. Can I use
a dial-up modem connected to my VG224 to achieve this purpose?
The setup will be:
PSTN -- Cisco3825 -- LAN -- VG224 -- dial-up modem (V.90) --  PC1.

I have searched cisco.com but still not sure if using
modem-passthrough can work. Also couldn;t find reference for the
maximum speed it can support. Anyone can help to comment or give a
link information? Thank you

regards,
Robin