Officials from Monroe County and the city of Rochester say that planned construction work on Saturday morning affected calls made to 911.
It happened just after 7:00 a.m. during a planned disconnect of fiber cable for construction at the Scottsville Road/390 interchange.
A statement from the county and city says that a Frontier Network redundant system failed to activate, so callers to 911 may have received a fast-busy signal from 7:05 to 7:40 a.m.
Beginning at 7:40 a.m. Saturday, all 911 calls in Monroe County were re-routed to the 911 center in Livingston County and as of early Saturday afternoon they were being handled by Ontario County.
Ontario County then transferred 911 calls to the Rochester/Monroe County Emergency Communications center for dispatch.
Monroe County crews are working with Frontier to make the needed repairs. Normal 911 functions were restored on Saturday as of 3:00 p.m.
