Verilink AS2000: The Basics (880-502981-001) Product Manual Manuel d'utilisateur télécharger pdf (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]

1 2 ... 133 134 135 136 137 138 139 140 141 142 143 ... 178 179

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