Assembling and Cabling Devices. Physical Data Link (MAC layer) LAN Physical Layer Implementations Ethernet 100baseTX 10BaseT 802.3 10Base510Base2 100baseFX.

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Presentation transcript:

Assembling and Cabling Devices

Physical Data Link (MAC layer) LAN Physical Layer Implementations Ethernet 100baseTX 10BaseT Base510Base2 100baseFX Specifications for 10MB Ethernet 802.3u Specifications for 100MB (Fast) Ethernet 100baseT4 10BaseF DIX Standard

Comparing Ethernet Media Requirements 10Base5 100BaseTX 10BaseT 100BaseFX Media Maximum Segment Length Topology Connector 50-ohm coax (thick) 500 meters Bus 100 meters Star Point-to-Point EIA/TIA Cat 3, 4, 5 UTP 2 pair EIA/TIA Cat 5 UTP 2 pair 62.5/125 micron multi- mode fiber AUI ISO 8877 (RJ-45) Duplex media- interface connector (MIC) ST ISO 8877 (RJ-45) 400 meters100 meters

UTP Device The RJ-45 Connector 1 8 8Pair 4 R Wire Pair T is Tip R is Ring Pair 3 T2 Pair 3 R2 Pair 2 T3 Pair 1 R1 Pair 1 T1 Pair 2 R3 Pair 4 T4 Pin

UTP Implementation Straight-through Wires on cable ends are in same order Pin Label 1RD+ 2RD- 3TD+ 4NC 5NC 6TD- 7NC 8NC Cable 10BaseT/ 100BaseTx Straight-through Pin Label 1TD+ 2TD- 3RD+ 4NC 5NC 6RD- 7NC 8NC Server/Router 8 1 wgwg gb wowo wbwb obr w br 1 8 Straight-through Cable 8 1 Hub/Switch 8 1 wgwg gb wowo wbwb obr w br

UTP Implementation Crossover Some wires on cable ends are crossed 8 1 wowo o b wgwg wbwb gbr w br Cable 10BaseT/ 100BaseT Crossover Pin Label 1RD+ 2RD- 3TD+ 4NC 5NC 6TD- 7NC 8NC Pin Label 1RD+ 2RD- 3TD+ 4NC 5NC 6TD- 7NC 8NC Crossover Cable wgwg g wbwb wowo bobr w br Hub/Switch

Straight-through versus Crossover Use a crossover cable when BOTH ports are designated with an x or neither port is designated with an x. Use straight-through when only one port is designated with an X. 1x 2x 3x 4x 1x 2x 3x 4x 1x 2x 3x 4x

WAN Physical Layer Implementations PPP Frame Relay EIA/TIA-232 EIA/TIA-449 X.21 V.24 V.35 HSSI ISDN BRI (with PPP) RJ-45 NOTE: Pinouts are different than RJ-45 used in campus HDLC

WAN Serial Connectors CSU/ DSU End user device DTE DCE Service provider

Data Terminal Equipment End of the user’s device on the WAN link Data Communications Equipment End of the WAN provider’s side of the communication facility DCE is responsible for clocking DCE DTE Modem CSU/DSU S S S S S S S S S S S S DTE DCE DTE vs DCE

Fixed Interfaces

Modular Interfaces

ISDN Connections

Setting up a Console Connection