Lased Line | WAN


WAN Terms :

WAN :

1- Customer premises equipment ( CPE )
ISP DSL Modem

2- Demarcation Point
( CPE ) .
DP

3- Local loop
(last-mile )

4- Central office (CO )


5- Toll network
Switches ISP WAN
6- Channel Service Unit/Data Service Unit ( CSU/DSU )
Clock rate Routers Modulation Demodulation Digital Analog Data .

.... Data Digital Analog
Analog Digital signals .

WAN Connection Type :

1- Point-to-Point Links ( Leased line )

WAN Connections 24 bandwidth Voice over IP Bandwidth 45Mbps

2- Circuit Switching

CPE CPE Data Dial-up ISDN Connections Data ADSL .

3- Packet Switching

Packet traffic . Network Network .

Digital Subscriber Line (DSL) :

ISDN 128 Mbps . DSL

1- Symmetrical DSL

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2 Asymmetrical DSL
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Cable Modem :

bandwidth

Serial Cable :

1- EIA/TIA-232
2- EIA/TIA-449
3- V.35 ( used to connect to a CSU/DSU )
4- EIA-530
5- X.21
6- RS-366
7- Smart Serial