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IS-136 DAM PS (1/2)
• Also referred to as digital AMPS (DAMPS), American Digital Cellular (ADC), North American TDMA (NA-TDMA), or even TDMA.
• The successor of IS-54 (IS-54c == IS-136)
• About four months to create the IS-54 specifications.
• The same frequency spectrum as AMPS.
• Also defined for 1850 - 1990 PCS spectrum.
IS-136 DAMPS (2/2)
• FDMA - TDMA (Time Division multiple Access) / FDD (Frequency Division Duplex) technology
• Carrier spacing = 30kHz.
• 3 channels (time slots) per frequency carrier
• Speech coding ratę: 7.95 kbps
• Capacity: about 3 times that of AMPS
• Roaming management standard: EIA/TIA IS-41
• Service area: North America
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