| Data Services
in GSM |
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| n | Data
transmission standardized with only 9.6 kbit/s |
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| – | advanced
coding allows 14.4 kbit/s |
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| – | not
enough for Internet and multimedia applications |
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| n | HSCSD
(High-Speed Circuit Switched Data) |
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| – | already
standardized |
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| – | bundling
of several time-slots to get higher AIUR (Air Interface |
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| User
Rate)(e.g., 57.6 kbit/s using 4 slots, 14.4 each) |
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| – | advantage:
ready to use, constant quality, simple |
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| – | disadvantage:
channels blocked for voice transmission |
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