I am looking to integrate voice and data over a T1 at our office. We currently have 12 phone lines and a DSL line. We are looking to increase the speed of our internet connection and use the T1 to also handle our voice data. I know this is possible, but can it work with the Merlin Legend? Our current sent is all analog. Can this system be upgraded to support a T1? ANY RECOMMENDATION WOULD BE GREATLY APPRECIATED.