Uplink Balancing - Can the RED use more than one WAN connection?

Hi,
I am thinking about using a cable modem for additional bandwidth and as a backup in case my T1's go down. I have an ASG220 in the main office and a RED in my remote office. My concern is that the ASG hostname is the IP of my T1 WAN link. Is the RED smart enough to know to use the secondary WAN link if the primary becomes unavailable? Or can the ASG Hostname field support more than one IP address? Also, can the RED use both WAN links at the same time for additional throughput?

Thanks,
Ben