WAN Technologies: An Overview of Dial-up, Leased Line, and ISDN Connections, Slides of Network and System Administration

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WAN TECHNOLOGIES

Technology Options

Dial-up Leased Line ISDN X. Frame Relay ATM DSL Cable Modem Microwave Point-to-Point Link VSAT

Dial-up

Dial-up

RAS

Leased Line

Used to provide point-to-point dedicated network connectivity. Analog leased line can provide maximum bandwidth of 9. 6 Kbps. Digital leased lines can provide bandwidths : 64 Kbps, 2 Mbps (E 1 ), 8 Mbps (E 2 ), 34 Mbps (E 3 ) ...

Leased Line Internet Connectivity

ISP Broadba nd Internet Connecti vity ISP Router Interface Converter LL Modem G. LL Modem V. Router ISP PREMISES (^) CUSTOMER PREMISES PSTN

ISDN

Two types of user access are defined Basic Access - Consists of two 64 Kbps user channels (B channel) and one 16 Kbps signally channel (D channel) providing service at 144 Kbps. Primary access - Consists of thirty 64 Kbps user channels (B channels) and a 64 Kbps signally channel (D channel) providing service at 2. 048 Mbps (One 64 Kbps channel is used for Framing and Synchronization). Basic B B D Information 128 Kbps (Voice & Data) Signaling 16Kbps Primary B B D Information 1920 Kbps Voice & Data Signaling 64 Kbps Docsity.com

ISDN

TE

TE2 TA

NT

4W 2W

ISDN devices S/T interface U interface Devices NT1 - Interface Converter TE1 - ISDN devices TE2 – Non ISDN Devices (need TA) TA - Terminal Adapter (ISDN Modem)Docsity.com