Question: I'm setting up an offsite DR facility on a budget. The office has 2 ADSL lines coming in to identical router/modem devices.

I'm looking for a cost effective (cheap) way of joining the two connections so that the network only sees one link to the outside world.

Primarily I'm looking for ADSL failover as opposed to load balancing and bonding but if the solution does all theree then that's fine.

Is anyone aware of a device that does this, or alternatively software that could be installed on a PC with multiple NIC's to manage this sort of thing?

Thanks in advance.

Answer: 
Get a DrayTek 2955
<http://draytek.co.uk/products/vigor2955.html>

Loads of feature for a one time price only
Have a look at Endian Community firewall. It allows multiple connections to be setup with failover. It's free, and also a solid firewall/proxy too.

[Endian - Secure everyThing](http://www.endian.org)

Download the ISO and install on any old bit of hardware with multiple NICs.