Alcatel-Lucent 1665 Installation Manual page 393

Glossary
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DSX - Digital Cross-Connect Panel
A panel designed to interconnect to equipment that operates at a designated rate. For example, a
DSX-3 interconnects equipment operating at the DS3 rate.
DTE - Data Terminating Equipment
That part of a data station that serves as a data source (originates data for transmission), a data sink
(accepts transmitted data), or both.
Dual Homing
A network topology in which two Alcatel-Lucent 1665 DMX serve as hosts supporting up to 16
OC-3 rings or 4 OC-12 rings. Each OC-3 and OC-12 ring is interconnected between the two
separate hosts.
DWDM
Dense Wave Division Multiplexer
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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
FC100
Fibre Channel 100 Mbps interface
FC400
Fibre Channel 400 Mbps interface
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.
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Alcatel-Lucent 1665 DMX R9.0
365-372-304R9.0 Issue 2
July 2010
Terms and definitions
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