System identification number
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System Identification Number can represented by the acronym SID. It is a Global number to identify base stations for AMPS, TDMA or CDMA networks. This number sometimes has conflicts (see IFAST).
SID Codes
These codes are 15/16 bit values and can be listed within a Wireless Device to show preference for one network over another. TIA TR-45.2 assigned ranges to every country in the 1980's and national regulators assigned individual numbers. IFAST took over in 1997. This number space is 90% utilized, however many countries do not use all of their allocated codes.