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twisted pair physical media dependent (LAN) (TP-PMD)

Twisted Pair Physical Medium Dependent(TP- PMD) is an ANSI standard initiated in 1993. The X3T9.5/93-223 working group specified TP-PMD for the transmission of FDDI data on TP cables up to a maximum distance of 100 meters.

At the physical layer, TP-PMD uses Multi Level Coding( MLC) and Multi Level Transmission( MLT-3). The TP-PMD standard provides for the use of UTP cables with 100 ohms as well as STP cables with an impedance of 150 ohms. The RJ45 connector or the Sub-D connector can be used as the plug.

TP-PMD has the advantage that it builds on established standards and preserves the MAC layer. It is used in FDDI, Copper Distributed Data Interface( CDDI) and Twisted Pair Distributed Data Interface( TPDDI), among others.

Informations:
Englisch: twisted pair physical media dependent (LAN) - TP-PMD
Updated at: 11.02.2011
#Words: 118
Links: terminal portability (ISDN) (TP), photonic mixer device (sensor) (PMD), American national standards institute (ANSI), standard (STD), working group (WG)
Translations: DE
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