Agilent Technologies HSSI WanProbe J3916A - Manual (Page 158)

Glossary
138
Encapsulation
The processing of wrapping data with a new protocol header for transmission over
the network.
Equipment
T1 and E1 equivalent of DTE. Also, the data signal generated by the user.
Equipment Build Out
This is an option used to set the transmitter signal level and pulse shape to match
the length of cable to the first repeater on the network.
Errored Seconds
Tells how many of the elapsed seconds had errors.
ESF (Extended Superframe Format)
An Extended Superframe consists of 24 frames with 193 bits each. One of the 193
bits is used for framing and called the framing bit. In ESF, not all of the framing
bits (24) are needed. Six of these framing bits are used for framing, six are used
for a CRC, and the remaining 12 bits make up a data link for control and
maintenance.
Ethernet
A LAN developed by Xerox Corp., Digital Equipment Corp., and Intel Corp. It
uses the CSMA/CD method of access and transmits at 10 Mbit/s on a bus
topology. The IEEE 802.3 standard evolved from Ethernet, but they are not
exactly the same. Network devices based on both standards can co-exist on the
same medium, but they cannot exchange data directly without special, bilingual
software that can decode packets of both types.
EtherTwist
The Hewlett-Packard Company’s version of 10Base-T.
Extended LAN
A network consisting of two or more LANs that are connected by bridges, routers,
or other similar devices. Resources on the LANs can be accessed by users on any
of the LANs. See also LAN.