The emergency phone numbers, 117 and 112, were unavailable in many parts of the country last night and into this morning.
The problems were first spotted in canton Zurich last night – but then other cantons followed.
All areas of the country are affected.
People are being urged to call their local forces on listed numbers at the moment.
Anti-G7 march route dispute escalates
Geneva and the organisers of the anti-G7 march are at an impasse over the cortege route, less than three weeks before the summit in nearby Évian.
Swiss '10-million' vote could trigger massive border jams
Switzerland could see kilometre-long traffic jams at its borders if voters back the People's Party's "No to 10 million" initiative on 14 June.
Five teens stand trial for Annecy knife-attack
Five teenagers will stand trial in Annecy in neighbouring France this summer over a knife attack on a 14-year-old boy outside a school.
Fake Swiss expulsion letters target foreign residents
Foreign residents across Switzerland are being warned about fake letters claiming they will be expelled from the country.
Ice-hockey ticket prices hike
Ice-Hockey team Fribourg-Gottéron has raised season-ticket prices for next season, angering some fans just weeks after the club's first Swiss championship title.
May's record-breaking temperatures
Switzerland is on track to record one of the hottest and driest Mays in its history.
