There is a lot of info missing from your post, such as what is being used as the DHCP server? Is the IP set being connected to a working network or directly to the BCM?
It sounds like the set is working as it should. My first thoughts, based on the supplied info, is that it is set for full DHCP and that that it has a really high retry count for both the S1 and S2 servers. Eventually that set should display "server unreachable".
Looks like you can get into programming so why don't you change DHCP to partial and manually set your S1 server to the address of the BCM, make sure your port is 7000 and keep your retry count down to about 10 or lower (same settings should apply to S2 except the retry set to 2 or something).
If you must leave DHCP turned on in the BCM, make sure it's set for "IP phones only". It's been my experience though that even leaving it set that way it can cause cause connectivity issues with the sets because of the customer's DHCP server responding first and therefore having the wrong address for the S1 and S2 servers. So, if the network already has a DHCP server, leave it off in the BCM, configure the set for partial and manually programm the S1 and S2 server parameters.
If you've never programmed those 1100 series sets, you're in for a treat. Get ready to pull some hair out as they are a pain in the a@#! until you get the hang of them.