We currently have 2 ground start lines entering our nortel option11c. The local phone company has been doing a city wide conversion to a "fiber to home project" and now our hospital is due for the conversion and will be converting to a fiber access. The phone company said that we will have to convert from a ground start to a loop start and were concerned on how this would affect the phone system. Will this require a hardware change to our system or just some programming revisions to handle how these 2 main lines come into our pbx? I would like to get an idea of what to expect so we can plan ahead for support since this is a little beyond my telephony knowledge.