modem network?

i have a bunch of old 2400 internal modems from back when dialup actually seemed like a good idea.  is there any way i can hook these things up to my computers to set up a LAN through the phone lines in my house, without negatively affecting my existing phone service?

Sure, if you really want a VPN slower than dial-up.
If by "negative effects", you mean complete interruption of phone service; have at it!

speed's not of particular concern to me, i just want to be able to extend my network across the house without resorting to wifi so i can access the web from my room.  i cannot drill holes in the walls or otherwise do anything else useful to string cat6 across the place or my landlord will shoot me.

complete interruption of the phone service would be a bad thing.

you'd be better off just getting a couple of 50ft ethernet cables and stringing them under your carpet.  GTFO.

If you really can't do straight ethernet or wi-fi, look into powerline ethernet adapters.

The speed on a 2400 baud modem network WILL piss you off, regardless of your application.  2400 bps = 2.4 Kbps = 0.3 KBps under best conditions.

Are you even sure they are 2400 baud modems?  And if they are internal, do your machines even have slots that would accommodate something that ancient?

>>1
Dude, throw away that shit.

>>4
He'd be better off carrying the data back and forth on floppy disks.

Hahaha wow. 2400 baud. Them were the days.

But surfing the web over 2400 baud? That's crazy talk. IIRC, downloading a 1MB file took an hour over 2400, and since many webpages nowadays are over 100KB for the HTML and CSS alone...

If you don't have web access in your room, read a book.