....................................................................................................................................................................................................................................
W
Wait to Restore Time (WRT)
Corresponds to the time to wait before switching back after a failure has cleared (in a revertive
protection scheme). The WRT can be between 0 and 15 minutes, in increments of one minute.
Wait-to-Restore (WTR)
Applies to revertive switching operation. The protection group enters the WTR state when all
Equipment Fail (EF) conditions are cleared, but the system has not yet reverted back to its
working line. The protection group remains in the WTR state until the Wait-to-Restore timer
completes the WTR time interval.
WAN
Wide Area Network
Wavelength Division Multiplexing (WDM)
A means of increasing the information-carrying capacity of an optical fiber by simultaneously
transmitting signals at different wavelengths.
WDCS
Wideband Digital Cross-Connect System
WDM
Wavelength Division Multiplexing
Wide Area Network (WAN)
A communication network that uses common-carrier provided lines and covers an extended
geographical area.
Wizard
A form of user assistance that automates a procedure through a dialog with the user.
WRT
Wait to Restore Time
....................................................................................................................................................................................................................................
Z
Zero Code Suppression
A technique used to reduce the number of consecutive zeros in a line-codes signal (B3ZS for
DS3 signals and B8ZS for DS1 signals).
....................................................................................................................................................................................................................................
365-372-333 R2.1
Issue 4, June 2005
Lucent Technologies
G L O S S A R Y
G L - 2 9