The Airport Expresstrain from Oslo Airport to the Central Station takes 20 minutes. There are also trains and busses which will take 40 minutes. Outside the Central Station, Jernbanetorget, tram number 12 and 13 and bus number 30, 31 and 32 will take you to Anker. The stop is called Hausmannsgate. There is at taxi rank by the Central Station. Walking distance from the Central Station to Anker: 7–8 minutes.
If you arrive at Torp Airport there are buses going to Oslo Bus Terminal. For details on this bus see www.torp.no. There is a taxi rank by the Oslo Bus Terminal. If you want to take public transportation you have to walk to Jernbanetorget (by the Central Station). Tram number 12 and 13 and bus number 30, 31 and 32 will take you to Anker. The stop is called Hausmannsgate. Walking distance from Oslo Bus Terminal to Anker: 10 minutes.