Alcatel-Lucent 1665 Installation Manual page 355

Terms and definitions
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E
EC-1, EC-n - Electrical Carrier
The basic logical building block signal with a rate of 51.840 Mb/s for an EC-1 signal and a rate of
n times 51.840 Mb/s for an EC-n signal. An EC-1 signal can be built in two ways: A DS1 can be
mapped into a VT1.5 signal and 28 VT1.5 signals multiplexed into an EC-1 (VT1.5 based EC-1) or
a DS3 can be mapped directly into an EC-1 (DS3 based EC-1).
ECI - Equipment Catalog Item
The bar code number on the faceplate of each circuit pack used by some inventory systems.
ES - Errored Seconds
A performance monitoring parameter.
ESF - Extended Super Frame
The format for a DS1 signal.
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F
FE - Far End
Any other network element in a maintenance subnetwork other than the one the user is at or working
on. Also called remote.
FE ACTY - Far End Activity
An LED on the SYSCTL circuit pack faceplate.
FEBE - Far End Block Error
An indication returned to the near-end transmitting node that an errored block has been detected at
the far end.
FEPROM - Flash EPROM
Nonvolatile Electrically-erasable Programmable Read-Only Memory.
FERF - Far End Receive Failure
An indication returned to the transmitting terminal that the receiving terminal has detected an
incoming section failure.
FE SEL - Far End Select
An LED on the faceplate of the SYSCTL circuit pack.
FIT
Failures in 10
Free Running
An operating condition of a clock in which its local oscillator is not locked to an internal
synchronization reference and is using no storage techniques to sustain its accuracy.
FT-2000
Lucent's SONET OC-48 Lightwave System.
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Alcatel-Lucent 1665 DMXtend R10.0
365-372-327R10.0 Issue 1
January 2013
-9
hours of operation.
G L- 1 9