[Serusers] Need SER config help.

To all, I'm new to SER and SIP; I was able to get SER up and running, but having trouble with some of the advance stuff. I would like to hire someone to help teach me the detail and get these services up and running faster. Here is our basic layout. We have multiple Cisco ATA's in BDD point to our SIP SERVER (SER), then they can TERM into one of three carrier, I would like to setup were if it failed to connect to one it will go to the other. When also have DID's that need to be pointed to different users on the network. Another problem we have is that we need live, accurate CDRS's. I tried to do it via Perl script, but it seems to be buggy. I just need some one to help out. Please contact me ASAP. -Gregory TIGRISNET voice(a)tigrisnet.net MSN:voipin@hotmail.com