# Timeline of train radio in Norway

The Norwegian railway network has used two types of train radio, Scanet and GSM-R. A train radio is a mobile telecommunications network that allows a train driver, maintenance crews and other rail transport officials to communicate with a dispatcher or each other. Scanet was an analog radio system installed on the main lines, limited to electrified lines with automatic train protection, between 1995 and 1999. The implementation left out many lines, which were instead covered by Nordic Mobile Telephone (NMT 450) network.
The lack of a train radio on the Røros Line was a contributing factor to the Åsta accident. This spurred the demand for full coverage. At the same time, the European Union required new systems to use the GSM-R standard, which will be implemented throughout Europe. GSM-R was rolled out between 2004 and 2007 and covers almost the entire network. It was also built to have 100% coverage in all tunnels, which was not achieved with Scanet. GSM-R was first rolled out on lines without Scanet, and then replaced the older system right-out. Both Scanet and GSM-R consist of mobile station in the trains, base stations along the track, and a core network connected to the central traffic control centers. The implementation of GSM-R cost 1.8 billion Norwegian krone.

## List

The following is a list of all railway lines with train radio. It includes the date of opening of the train radio, including the affected section, and the standard used. Freight-only lines are excluded from the list, even if they may have had Scanet or have GSM-R.
| Date | Line | Section | System |
| 7 May 1995 | Sørlandet | Drammen–Hokksund | Scanet |
| 7 May 1995 | Randsfjorden | Hokksund–Hønefoss | Scanet |
| 17 December 1996 | Sørlandet | Sira–Stavanger | Scanet |
| 7 May 1997 | Drammen | Oslo S – Drammen | Scanet |
| 7 May 1997 | Bergen | Hønefoss–Bergen | Scanet |
| 16 May 1997 | Sørlandet | Hokksund–Kristiansand | Scanet |
| 17 December 1997 | Sørlandet | Kristiansand–Stavanger | Scanet |
| 9 July 1998 | Gjøvik | Oslo S – Roa | Scanet |
| 9 July 1998 | Roa–Hønefoss | Roa–Hønefoss | Scanet |
| 9 July 1998 | Østfold | Oslo S – Kornsjø | Scanet |
| 9 July 1998 | Trunk | Lillestrøm–Eidsvoll | Scanet |
| 9 July 1998 | Dovre | Eidsvoll–Trondheim | Scanet |
| 9 July 1998 | Kongsvinger | Lillestrøm–Magnor | Scanet |
| 9 July 1998 | Vestfold | Drammen–Porsgrunn | Scanet |
| 9 July 1998 | Bratsberg | Nordagutu–Porsgrunn | Scanet |
| 8 October 1998 | Gardermoen | Lillestrøm–Eidsvoll | Scanet |
| 22 August 1999 | Gardermoen | Oslo S – Lillestrøm | Scanet |
| 15 May 2004 | Nordland | Rognan–Bodø | GSM-R |
| 1 December 2004 | Nordland | Trondheim S – Rognan | GSM-R |
| 1 December 2004 | Meråker | Hell–Storlien | GSM-R |
| 1 December 2004 | Stavne–Leangen | Stavne–Leangen | GSM-R |
| 1 December 2004 | Røros | Hamar–Støren | GSM-R |
| 1 December 2004 | Dovre | Dombås – Trondheim S | GSM-R |
| 1 May 2005 | Flåm | Myrdal–Flåm | GSM-R |
| 1 November 2005 | Gjøvik | Roa–Gjøvik | GSM-R |
| 1 November 2005 | Eastern Østfold | Ski–Sarpsborg | GSM-R |
| 2 January 2007 | Østfold | Oslo S – Kornsjø | GSM-R |
| 2 January 2007 | Gardermoen | Oslo S – Eidsvoll | GSM-R |
| 2 January 2007 | Trunk | Oslo S – Eidsvoll | GSM-R |
| 2 January 2007 | Kongsvinger | Lillestrøm–Charlottenberg | GSM-R |
| 2 January 2007 | Dovre | Eidsvoll–Dombås | GSM-R |
| 2 January 2007 | Gjøvik | Oslo S – Roa | GSM-R |
| 2 January 2007 | Drammen | Oslo S – Drammen | GSM-R |
| 2 January 2007 | Asker | Sandvika–Asker | GSM-R |
| 2 January 2007 | Spikkestad | Asker–Spikkestad | GSM-R |
| 2 January 2007 | Sørlandet | Drammen–Stavanger | GSM-R |
| 2 January 2007 | Randsfjorden | Drammen–Hønefoss | GSM-R |
| 2 January 2007 | Bergen | Hønefoss–Bergen | GSM-R |
| 2 January 2007 | Roa–Hønefoss | Roa–Hønefoss | GSM-R |
| 2 January 2007 | Vestfold | Drammen–Porsgrunn | GSM-R |
| 2 January 2007 | Bratsberg | Nordagutu–Porsgrunn | GSM-R |