x DSL Digital Subscriber Line Transparent LAN Service

Δίκτυα Η/Υ ΙΙ x. DSL Digital Subscriber Line

Δίκτυα Η/Υ ΙΙ Transparent LAN Service

Δίκτυα Η/Υ ΙΙ Copper vs Fiber

Δίκτυα Η/Υ ΙΙ Technologies • HDSL (High-bit-rate Digital Subscriber Line) E 1/T 1 dublex 4 -wire UTP 12000 ft 80 KHz-240 KHz • SDSL (Symmetric Digital Subscriber Line) 2 -wire as HDSL • ADSL -- Asymmetric Digital Subscriber Line • RADSL (Rate Adaptive Asymmetric Digital Subscriber Line)

Δίκτυα Η/Υ ΙΙ Η συνδεσμολογία του ADSL 1, 5 – 6, 1 Mbps 16 – 640 Kbps ATM Πάροχος Splitter ISP Πελάτης Splitter ADSL modem DSLAM PST N POTS

Δίκτυα Η/Υ ΙΙ Active vs Passive Termination

Δίκτυα Η/Υ ΙΙ Ο διαχωρισμός του φάσματος με echo cancellation ADSL option category 2 Echo Cancellation POTS UP STREAM 4 24 DOWN STREAM 1. 100 (KHz)

Δίκτυα Η/Υ ΙΙ VDSL • VDSL -- Very high data rate Digital Subscriber Line Downstream – 12. 96 Mbps (1/4 STS-1) 4, 500 feet of wire – 25. 82 Mbps (1/2 STS-1) 3, 000 feet of wire – 51. 84 Mbps (STS-1) 1, 000 feet of wire – Upstream 1. 6 -2. 3 Mbps

Δίκτυα Η/Υ ΙΙ Νέες Τεχνολογίες • • Hybrid Fiber Coax (HFC) Fiber to the Curb (FTTC) Fiber to the Home (FTTH) Multipoint multichannel distribution service MMDS cell 25 -35 miles 2. 15 GHz-2. 6 GHZ • Local multipoint distribution service LMDS cell 5 miles 27. 5 GHz-28. 35 GHZ

Δίκτυα Η/Υ ΙΙ Hybrid Fiber Coax HFC