I have a modem/router (ADSL) and a wired network.

My daughter (who cons the occasional man into fixing some ofher computer disasters) has just had a clear-out of her drawer of spare computer parts left behind by the said occasional men (who, I should add, do nothing other than fix computers, she has a permanent man for other things) and sent me the oddments.

Oddments include a spare ADLS USB modem .

Can I use that on another phone socket on my ADSL line to give me another access point to the internet that was NOT on my network?