Article written by John Scourias, with comments in maroon by Tom Farley

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4. Radio link aspects

The International Telecommunication Union (ITU), which manages the international allocation of radio spectrum (among many other functions), allocated the bands 890-915 MHz for the uplink (mobile station to base station) and 935-960 MHz for the downlink (base station to mobile station) for mobile networks in Europe. Since this range was already being used in the early 1980s by the analog systems of the day, the CEPT had the foresight to reserve the top 10 MHz of each band for the GSM network that was still being developed. Eventually, GSM will be allocated the entire 2x25 MHz bandwidth.

Cellular Radio frequencies around the world

American Cellular
AMPS, N-AMPS, D-AMPS (IS-136) CDMA	824-849 MHz 869-894 MHz	Mobile to base Base to mobile
American PCS/GSM
Narrowband	901-941 MHz
Broadband	1850-1910MHz 1930-1990 MHz	Mobile to base Base to mobile
E-TACS
	872-905 MHz 917-950 MHz	Mobile to base Base to mobile
GSM
GSM has three main frequency bands around the world: 900 MHz, 1800 MHz, and 1900 MHz. It all depends on the country. Other bands may be used in the future or may be in trial right now.	935-960MHz 890-915MHz
	1800MHz
	1900 MHz.
JDC
	810-826 MHz 940-956 MHz 1429-1441 MHz 1477-1489 MHz	Mobile to base Base to mobile Base to mobile Mobile to base

GSM frequency spacing is 200Khz, AMPS is 30 Khz

American PCS/GSM/ Cellular frequencies

(A more specific view)

Click on the image above or on this link to view PCS/GSM frequencies in the U.S.

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