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| Analog Cellular - local | Analog Cellular - roaming | Iridium | Inmarsat B | Mobile Packet Data Service (MPDS) | |
|---|---|---|---|---|---|
| bps | 2400 | 2400 | 2400 | 64K | NA |
| cost | $0.15/min, 90 free minutes | $1.05/min | $0.95/min | $6.50/min | $3/Mbit |
| Time Slice | 60 sec | 60 sec | 60 sec | 6 sec | NA |
| Minimum Connection Duration, good connection | 45 sec | 45 sec | 45 sec | 45 sec | NA |
| Minimum Connection Duration, bad connection | NA | NA | 90 sec | 90 sec | NA |
| Compression Estimate | +10% | +10% | -30% | -30% | -30% |