Complex sentence: Over the next few years, the AM broadcasting equipment deteriorated to a point at which it was no longer functional, and student programming moved to an intranet streaming format, calling itself WGCC, even though this was not a legitimately-issued callsign.
Split into simpler sentences: Over the next few years, the AM broadcasting equipment deteriorated to a point at which it was no longer functional. Student programming subsequently moved to a carrier-current station and later to an intranet streaming format, calling itself WGCC, even though this was not a legitimately-issued callsign.