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Beyond Godly |
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Posts: 3703 Joined: Mon May 31, 2004 10:11 pm Location: 51°23' 0°30
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GSM is circuit switched. If the TraceME unit sends data via GSM, a channel is reserved (just like for voice communication) and data is transmitted. You’re charged for the time the channel is reserved.
GPRS is ‘always on’ and packet switched. Data is sliced into packets and transmitted through the GSM network. This is faster and cheaper because network capacity is used more effectively. You’re charged for the amount of data that’s being transported, not for the time that the unit is online.
kudos sasha+gregory // PPT's Unofficial President
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