•Absolute Radio Frequency Channel Number, a code to specify a pair of physical radio carriers and CHANNELS within the spectrum that is allocated for cellular mobile communications.
•ARFCN is USED for transmitting and receiving on the UM Interface, one to uplink signal and one to downlink signal.
•ARFCN's bandwidth is 270.833 kHz; channel spacing is 200 kHz in a given GSM band.
•The uplink-downlink spacing is GENERALLY 45 / 50 MHz.
•If Frequency Division Duplex is operated in the system, then the channel number is associated with both uplink and downlink radio channels.
•ARFCN is 1-124 within GSM900 spectrum, 512-885 within GSM1800, 512-810 within GSM1900, are used.

•Absolute Radio Frequency Channel Number, a code to specify a pair of physical radio carriers and channels within the spectrum that is allocated for cellular mobile communications.
•ARFCN is used for transmitting and receiving on the UM Interface, one to uplink signal and one to downlink signal.
•ARFCN's bandwidth is 270.833 kHz; channel spacing is 200 kHz in a given GSM band.
•The uplink-downlink spacing is generally 45 / 50 MHz.
•If Frequency Division Duplex is operated in the system, then the channel number is associated with both uplink and downlink radio channels.
•ARFCN is 1-124 within GSM900 spectrum, 512-885 within GSM1800, 512-810 within GSM1900, are used.