Hello, I work at a b-school in Mumbai, India. Due to our remote location (away from city) we get very poor bandwidth. In order to service user requirements, we have purchased several cable modem connections (from local cable Internet ISP) in addition to a couple of ISDN lines (128kbps each), a 256kbps wireless (RF) link to a nearby ISP and one leased line (256kbps). (None of these lines provide anything close to their rated speeds).
Right now, we are using selected incoming lines for selected subnets (eg: leased line for faculty subnet, cable modems for individual class rooms etc) though they all are part of a complex LAN and go through one of several gateway servers. Unfortunately, these lines go down often and everyday, some group of users loses their internet.
I am looking for an inexpensive way to join all these connections, so that i have a larger aggregate pool of bandwidth for ALL my users. Should one line get over-loaded or fail, another should be used. Cheaper line (usage cost) should be maxed out first etc.
Short of exorbitant Cisco routers and the like, I am unable to find a solution that doesnt involve huge investments in hardware/software. Any suggestions will help 400 internet starved MBA students and their therapists (the faculty!)