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GSM Frequecy Band

GSM FREQUENCY BAND


 GSM frequency bands are the radio spectrum frequencies designated by the ITU for the operation of the GSM phones.

There are four GSM bands: 850, 900, 1800, and 1900. The most dominant bands in the United States are 850 and 1900, while the other two are used more in the rest of the world. And Another less common GSM version is GSM-450.

Well, different sites are compatible with different GSM frequency bands.Example Vodafone INDIA uses both 800 as well as 1800 Frequency Band for its Mobile Operation.

There are fourteen bands defined in 3GPP TS 45.005, which succeeded 3GPP TS 05.05:
 
System
Band
Uplink (MHz)
Downlink (MHz)
Channel Number
T-GSM-380
380
380.2–389.8
390.2–399.8
Dynamic
T-GSM-410
410
410.2–419.8
420.2–429.8
Dynamic
GSM-450
450
450.4–457.6
460.4–467.6
259–293
GSM-480
480
478.8–486.0
488.8–496.0
306–340
GSM-710
710
698.0–716.0
728.0–746.0
Dynamic
GSM-750
750
747.0–762.0
777.0–792.0
438–511
T-GSM-810
810
806.0–821.0
851.0–866.0
Dynamic
GSM-850
850
824.0–849.0
869.0–894.0
128–251
P-GSM-900
900
890.0–915.0
935.0–960.0
1–124
E-GSM-900
900
880.0–915.0
925.0–960.0
975–1023, 0-124
R-GSM-900
900
876.0–915.0
921.0–960.0
955–1023, 0-124
T-GSM-900
900
870.4–876.0
915.4–921.0
Dynamic
DCS-1800
1800
1710.0–1785.0
1805.0–1880.0
512–885
PCS-1900
1900
1850.0–1910.0
1930.0–1990.0
512–810
 
Frequency bands and channel arrangement
 
Standard or primary GSM 900 Band, P-GSM:
·         890 - 915 MHz: mobile transmit, base receive
·         935 - 960 MHz: base transmit, mobile receive
 
Extended GSM 900 Band, E-GSM (includes Standard GSM 900 band):
·         880 - 915 MHz: mobile transmit, base receive
·         925 - 960 MHz: base transmit, mobile receive
 
Railways GSM 900 Band, R-GSM (includes Standard and Extended GSM 900 Band);
·         876 - 915 MHz: mobile transmit, base receive
·         921 - 960 MHz: base transmit, mobile receive
 
DCS 1 800 Band:
·         1 710 - 1 785 MHz: mobile transmit, base receive
·         1 805 - 1 880 MHz: base transmit, mobile receive
 
NOTE: The term GSM 900 is used for any GSM system which operates in any 900 MHz band.
 
NOTE: The BTS may cover the complete band, or the BTS capabilities may be restricted to a subset only, depending on the operator needs.
 
DUAL BAND
 
Dual band refers to the capability of GSM network infrastructure and handsets to operate across two frequency bands e.g. 850/1900 MHz
 
TRI BAND
A Tri Band phone will operate on three different frequencies depending on the available network. e.g. 850/1800/1900 MHz.
 
Quad-band mobile
A quad-band mobile phone is operational on any of the four GSM frequencies - e.g. 850/900/1800/1900 MHz.
 
EXTERNAL LINKS
·         GSM frequency bands