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IMT 546

WAN Technologies

By

Bob Larson

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R

outers

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Switching vs. Routing

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Wide Area Net works (WANs)

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Wide Area Net work (WAN)

Links net works or devices over larger geographicalarea Can be across town or across the globe

Connections can be part-time or full-time MODEM & ISDN are traditional part-time (on-demand)

E1/T1s, Frame Relay are traditional full-time net works

Cable and DSL are newer full-time (always-on) net works

Typically involve a 3rd-party service provider

WAN bandwidth determined by service provider Greater bandwidth the greater the monthly cost 

Connections are often Serial (64kbps-45Mbps) Typically slower than the LANs they connect 

Typically connect to LANs via a router

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Routers and WAN switches

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WAN Service Providers

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WAN Links Connect LANs

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Typical Corporate WAN Net works

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WAN Distribution Net work

Access Links

Distribution Links

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Dedicated Connections (Leased Lines)

Typical connections on a dedicated net workmay operate at the following speeds: 56 kbps

64 kbps

T1 (1.544 Mbps) US / E1 (2.048 Mbps) European

T3 (44.736 Mbps) US / E3 (34.064 Mbps) European

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Dedicated Links (New Kids on the Block)

Digital Subscriber Line (DSL)

 Asymmetric Digital Subscriber Line (ADSL)

High Data-Rate Digital

Subscriber Line (HD

SL)

Symmetrical Digital Subscriber Line (SDSL)

 Very High Data Rate Digital Subscriber Line(VDSL)

Cable modems

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Packet-Switched Net works

X.25 enhancement on POTS

Frame relay time-share alternative to leased lines

 ATM (cell relay) high speed through uniformity

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Circuit-switched Connections

 Asynchronous Dialup (POTS) Plain old telephone service (POTS)

ISDN Basic Rate Interface (BRI)

ISDN Primary Rate Interface (PRI)

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Integrated Services Digital Net work (ISDN)

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Wireless WAN Alternative

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2.4GHz Antennas for Long Range

13.5 dBi YagiDistances over 

7.3

miles @ 2 Mbps11.7 Km @ 2 Mbps

3.6 miles @ 11 Mbps

5.8 Km @ 11 Mbps

21 dBi Solid DishFor distances up to

25+ miles @ 2 Mbps40+ Km @ 2 Mbps

20.5 miles @ 11 Mbps

33 Km @ 11 Mbps

Note: Distances include5

0 feet of low loss cable and1

0 dB fade margin

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NoWY R Net work Fife

Link

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WAN Line Types and Bandwidth

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MCI UUNet 

Spans more than 4,500 Points of Presence (PoPs) throughout North America, Europe and the Pacific Rim, and is arguably the world's topInternet backbone. Link

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Link

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Link

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Latency

Link

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Technology Convergence

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What is AVVID?

 Architecture for Voice, Video and Integrated Data Provides the framework (strategy) for today's Internet 

business solutions Provides the road map for combining business and

technology strategies into one cohesive model Delivers the e-business infrastructure and intelligent 

net work services that are essential for rapid deployment of emerging technologies and new Internet businesssolutions

Provides an enterprise foundation that combines IPconnectivity with security, high availability, and quality of service

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IP Telephony (VoIP)

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IP Video Conferencing

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Wireless LANs (WLANs)

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Cisco AVVID Security

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 Virtual Private Net works (VPNs)

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Content Net working

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IP Contact Center

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Storage Net working

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Fin