Do you want full video and audio, with pan, zoom and tilt? Are you looking for an indoor or outside setup? Do you want constant monitoring, or something intermittent?
Is there internet access, phone access, power?
Need more info, but PTZ cameras are getting pretty inexpensive. If there’s a PC and internet access already, then you could just leave a camera running.
Yes, more information is needed, particularly whether you’re considering indoor/outdoor, the distance to a power supply (or whether it’ll be battery operated), and whether there is a computer available.
The cameras themselves don’t record (you’ll need to add a DVR for that), but you can get ones that will wake up when they sense movement and e-mail you some stills every few minutes or so. They’ll even track the movement if they are smart PTZ. That would probably be the best you can do over dial up. I have one here in front of me that has its own internal web server, so all it needs is a broadband connection (no need to leave a PC running).