Lucent Technologies LambdaUnite Installation Manual page 327

Doping
The addition of impurities to a substance in order to attain desired properties.
Downstream
At or towards the destination of the considered transmission stream, for example, looking in the
same direction of transmission.
DPLL
Digital Phase Locked Loop
DRAM
Dynamic Random Access Memory
Drop and Continue
A circuit configuration that provides redundant signal appearances at the outputs of two network
elements in a ring. Can be used for Dual Node Ring Interworking (DNI) and for video
distribution applications.
Drop-Down Menu
A menu that is displayed from a menu bar.
DS1
1.5 Mbps interface
DSNE (Directory Service Network Element)
A designated Network Element that is responsible for administering a database that maps
Network Elements names (node names) to addresses (node Id). There can be one DSNE per
(sub)network.
DTE (Data Terminating Equipment)
The equipment that originates data for transmission and accepts transmitted data.
DTMF
Dual Tone Multifrequency
DUR
Dual Unit Row
DUS
Do not Use for Synchronization
....................................................................................................................................................................................................................................
365-374-059
Issue a, January 2002
Lucent Technologies G L O S S A R Y
G L - 1 1