Both sites have Innovative T1 links. There is no throttling. All regular internet traffic at the RH site uses the BBVI link. It doesn't have a throttle either. Traffic often goes up to 3.2 mb/sec. There isn't any traffic caps.
The only traffic across the T1's are remote desktop connections. There are 6 of them during the day, not counting mine. The servers are all at RH.
I have had a remote desktop connection from my house running since last Thursday. I have some ping tests going on that link and a web page connection. It hasn't dropped. I have a second one running to mirror a user at YH.
There is a VPN tunnel that runs over the BBVI links between the two sites. It is only used for printing to the LAN printer from EHS and AC.