Our company currently uses a Norstar MICS with a T1 connection for our phone service. Our phone company (ATT) wants to get rid of this T1 line and move our internet and phone onto the same, faster Fiber Optic service. Are there any issues to be aware of when making this change? Will the ATT router handle the conversion of the analog lines to data or is that all done by the MICS? I'm not super familiar with telephony and even less familiar with the Norstar systems. Thanks in advance.