Nordic Mobile Telephone (NMT)
Nordic Mobile Telephone (NMT, NMT-450, and NMT-900) is a first generation analog cell phone system. Originally designed for and by Nordic countries (Finland, Sweden, Norway, Denmark) it was widely deployed around the world, for example in Saudi Arabia, Russia and Switzerland. It was completely automatic and allowed for users to roam freely in participating countries. Nowadays (as of 2015) NMT is defunct.
Voice is transmitted as NFMNarrowband Frequency Modulation, data as FSKFrequency-Shift Keying. Data rate is 1200 baudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second., with mark/space frequencies of 1200/1800 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz)..
|System||Uplink (MHzMegaHertz (MHz) 10^6 Hz)||Downlink (MHzMegaHertz (MHz) 10^6 Hz)||Channel Width|
|NMT-450||453 - 457.5||463 - 467.5||25 kHzKiloHertz (kHz) 10^3 Hz|
|NMT-900||890 - 915||935 - 960||25 kHzKiloHertz (kHz) 10^3 Hz|
- Nordic Mobile Telephone article on Wikipedia
- RadioScanner.RU NMT Info (Russian)
- WAVECOM Database: NMT450
- shoc Database: NMT450