Verilink AS2000: The Basics (880-502981-001) Product Manual - Manual (Page 138)

Acronyms and Definitions
Glossary-18 Verilink Access System 2000: Basics
ES See errored second (ES) .
ES-L See errored seconds-line .
ES-P See errored seconds-path .
ESF See Extended Superframe
Format (ESF) .
ESF data link See facility data link (FDL) .
ESF error event An event that occurs when an ESF
contains either a CRC-6 error
event or an out-of-frame (OOF)
event.
event log The activity log file. The event log
shows the data and time for each
user’s action. Each time a system
event occurs (such as a system
start-up, shut-down, log in, log off,
start or finish of polling, etc.), a
record is made and saved (logged)
to the database. These events can
then be viewed at a later time.
Excess Burst Size (Be) In frame relay networks, the
maximum amount of data in bits
that the service provider can
transfer over the Committed Burst
Size (Bc) during a certain time
interval, Tc. These frames are
discard eligible.
Extended Superframe Format (ESF) An AT&T framing standard that
provides frame synchronization,
cyclic redundancy check, checking
data, and link bits. This standard
allows errors to be stored and
retrieved easily, enhancing
network maintenance. The
Extended Superframe framing
format divides a 1.544 Mbit/s (T1)
line into four main sections and
contains 24 frames: --(1) Traffic
and signalling [1.536 Mbit/s]—
Divided into 24 64-kbit/s channels
in one frame. --(2) Framing [2
kbit/s] --(3) CRC-6 [2 kbit/s] --(4)
Facility data link [4 kbit/s]