1000BASE-X

OSI

reference

model

layers

LAN and CSMA layers

Higher layers

LLC - logical link control

Reconciliation

LX-PMD

SX-PMD

CX-PMD

1000BASE-LX

(PCS, PMA, and LX-PMD)

1000BASE-SX

(PCS, PMA, and SX-PMD)

1000BASE-CX

(PCS, PMA, and CX-PMD)

LX-MDI

SX-MDI

CX-MDI

GMII - Gigabit media independent interface

PCS - Physical coding sublayer

PMA - Physical medium attachment

MAC control (optional)

MAC - media access control

Medium

Medium

Medium

1000BASE-X

PHY

To 1000 Mb/s baseband

repeater set or to

1000BASE-X PHY

(point-to-point link)

MDI - Media dependent interface

PHY - Physical layer device

PMA - Physical medium attachment

PMD - Physical medium dependent

LX-PMD = PMD for fiber - long wavelength

SX-PMD = PMD for fiber - short wavelength

CX-PMD = PMD for fiber - 150? balanced copper cabling

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