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Preliminary Spec. ver
1.4
KS8910 100/10 Mbps ETHERNET TRANSCEIVER
•
OC12 - 622.08 Mbit/s Optical Carrier 12, SONET Synchronous Transport Signal STS-12. Twelve byte-
interleaved STS-1 signals.
•
OC48 - 2488.32 Mbit/s Optical Carrier 48, SONET Synchronous Transport Signal STS-48. 48 byte-interleaved
STS-1 signals.
•
Octet - byte.
•
OSI - Open System Interconnection reference model layers adopted by the ISO application, presentation,
session, transport, network, data link (composed of LLC and MAC layers of LAN CSMA/CD), and physical
(composed of PLS and PMA layers of LAN CSMA/CD, connected by AUI). Also, Obsolete Systems
1
Interconnect.
•
Packet - According to 802.3 Tutorial, a packet is a frame, preceded by the preamble and the start frame
delimiter fields. Thus, it consists of (1) preamble, (2) start frame delimiter, (3) destination and (4) source
addresses, (5) length, (6) LLC data, (7) padding, and (8) frame check sequence fields.
•
PCI - Peripheral Component Interconnect. 32 or 64 bits wide, 0 to 33 MHz clock rate, 132 to 264 MBytes/s
(peak). Intel Corporation released version 1.0 of the PCI specification on June 22, 1992, and the PCI Special
Interest Group released revision 2.0 on April 30, 1993.
•
Ping - Packet InterNet Groper. Tests the reachability of another site by sending an ICMP echo request
message.
•
PCMCIA - Personal Computer Memory Card International Association. Also, People Can' t Memorize Computer
Industry Acronyms.
•
PDU - Protocol Data Unit in ATM.
•
PHY - Physical Layer Entity, as defined in the 802 Architecture and Overview Standard. The word PHY is used
to denote the set of functions associated with a physical layer protocol.
•
PLS - Physical Signalling layer of LAN CSMA/CD. See OSI.
•
PMA - Physical Medium Attachment. See OSI.
•
PMD - Physical Medium Dependent layer. PMD connects to MAC via MII on one side, and connects to MDI on
the other.
•
PPP - Point-to-Point Protocol. Successor to SLIP, Serial Line Internet Protocol. Provides router-to-router and
host-to-network connections over both synchronous and asynchronous circuits.
•
PSTN - Public Switched Telephone Network.
•
Preamble - The first field of a packet, up to seven bytes long. Each byte has value 10101010, transmitted left to
right.
•
QAM - Quadrature Amplitude Modulation. Modulation of both amplitude and phase, to increase the information
capacity of a channel.
•
RARP - Reverse Address Resolution Protocol. Maps a physical address to an Internet address. Only some
networks need it.
•
Repeater - Connects two or more Ethernet segments, with signal amplification and timing and preamble
regeneration, but without storing packets.
•
RJ-11 - Four-wire modular telephone connector.
•
RJ-45 - Eight-wire modular telephone connector.
1. Greg Chesson, "Protocol Engine Design", Summer Usenix Conference, Phoenix Arizona, 1987, pages
209-215.
APPENDIX
A-5
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