Alcatel-Lucent 1643 AMS Operation Manual page 354

Glossary
Domain
The domain of an ITM-SC is the set of all SDH network elements that are controlled by
that particular ITM-SC.
Downstream
At or towards the destination of the considered transmission stream, i.e. in the direction
of transmission.
DPLL
Digital Phase-Locked Loop
DPS
Data communication Packet Switch
DR
Digital Radio
DRI
Dual-Ring Interworking
DS-n
Digital Signal, Level n
DTMF
Dual-Tone Multi-Frequency
Dual Homing
An STM-1/STM-4 ring with 1643 AM/ 1643 AMS equipment can be dual homed on a
ring consisting of Metropolis® ADM (Universal shelf), Metropolis® ADM (Compact
shelf), or WaveStar® ADM 16/1. Also STM-16 rings can be dual homed with the
Metropolis® ADM (Universal shelf)).
Dual-Node Interworking
Dual Node Interworking (DNI) is a configuration of two ring networks that share two
common nodes. DNI allows a circuit with one termination in one ring and one
termination in another ring to survive a loss-of-signal failure of the shared node that is
currently carrying service for the circuit.
DUS
Do not Use for Synchronization
DWDM
Dense-Wavelength Division Multiplexing
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E EC-n
Electrical Carrier, Level n
ECC
Embedded Control Channel
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GL-8 Alcatel-Lucent - Proprietary
See notice on first page
365-312-803R7.2
Issue 4, May 2007