EMC
Electromagnetic Compatibility
EMI
Electromagnetic Interference
EPROM
Erasable Programmable Read-Only Memory
EQPT
Equipment
Errored Seconds (ES)
A performance monitoring parameter. ES
″
type A
″
is a second with exactly one error; ES
″
type
B
″
is a second with more than one and less than the number of errors in a severely errored
second for the given signal. ES by itself means the sum of the type A and type B ESs.
ES
Errored Seconds
ESD
Electrostatic Discharge
ESF
Extended Super Frame
Event
A significant change. Events in controlled Network Elements include signal failures, equipment
failures, signals exceeding thresholds, and protection switch activity. When an event occurs in a
controlled Network Element, the controlled Network Element will generate an alarm or status
message and send it to the management system.
Extended Superframe Format (ESF)
A T1 format that uses the framing bit for non-intrusive signaling and control. A T1 frame is
sent 8,000 times a second, with each frame consisting of a payload of 192 bits, and with each
frame preceeded by a framing bit. Because ESF only requires 2,000 framing bits for
synchonization, the remaining 6,000 framing bits can be used for error detection.
....................................................................................................................................................................................................................................
F
Facility
A one- or two-way circuit that carries a transmission signal.
Facility Loopback
A facility loopback is where an entire line is looped back.
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365-372-333 R2.1
Issue 4, June 2005
Lucent Technologies
G L O S S A R Y
G L - 9