File photo dated March 26, 2020 of Swisscom headquarters in Bern, Switzerland. Emergency numbers in many parts of Switzerland, including cities such as Zurich, Basel and Geneva, were unavailable from 11.45pm on Thursday until 7.53am on Friday. Swisscom has identified the source of the problem and is investigating the technical failure. The breakdown hit the emergency numbers 112 and 117 (police), 118 (fire service), and 144 (ambulance). The outage seemed to only affect landline connections. By contrast, mobile connections were not affected, Swisscom said. Photo by Francois Glories/ABACAPRESS.COM