MMDS System Multipoint Multichannel Distribution Service LMDS Local

Δίκτυα Η/Υ ΙΙ MMDS System Multipoint Multichannel Distribution Service

Δίκτυα Η/Υ ΙΙ LMDS Local Multipoint Distribution System

Δίκτυα Η/Υ ΙΙ Co-sited base station

Δίκτυα Η/Υ ΙΙ Analog fibre architecture

Δίκτυα Η/Υ ΙΙ Data Rate: Type: Connector: Line Code: Impedance: 2048 Kbps CEPT-I, meets CCITT G. 703 and G. 823 2 x BNC (unbalanced), RJ-45 (balanced) HDB 3 or AMI 75 Ohm (unbalanced), 120 Ohm (balanced)

Δίκτυα Η/Υ ΙΙ Satellite Bands C already congested.

Δίκτυα Η/Υ ΙΙ Iridium (Dysprosium) • 66 sats • Altitude 750 Km • Both user and base station moving • $7 / min • Phone-set $3. 000 • Project cost $5 billion • Went into chapter 11, August 1999

Δίκτυα Η/Υ ΙΙ Teledesic-840 • Craig Mc. Caw, Bill Gates and AT&T Wireless Services. • IP-based system, designed to support data, voice and video at the same quality level as fiberbased terrestrial systems. • Ka Band • Total 20. 000 T 1 • An Internet in the sky • 2004, cost $9 billion

Δίκτυα Η/Υ ΙΙ Very Small Aperture Terminal • 1 m antenna • Uplink 1 Watt – 19. 2 Kbps • Downlink – 512 Kbps

Δίκτυα Η/Υ ΙΙ VSAT Hub Indonesia! Delay (typical 540 msec) Delay on air: 3μsec/Km Delay in copper/fiber: 5μsec/Km