Glossary
GL-20 July 2008 Alcatel-Lucent 7342 ISAM FTTU ONT R04.05.06
ONT Product Information Manual Edition 01 3FE 51892 AAAA TCZZA
UTC Coordinated Universal Time
A time scale that couples Greenwich Mean Time, which is based solely on
the Earth's inconsistent rotation rate, with highly accurate atomic time.
V ac Volts alternating current
VCL Virtual Channel Link
VCSL Video Coupler Shelf, LGX compatible
VCW2 Video Coupler WDM Cassette, 2 PON
A unit that is installed into the Video Coupler Shelf-LGX (VCSL) of an
FTTU system. Each VCW2 contains two WDM units, which allows each
line termination (LT) card installed in the packet optical line termination
(P-OLT) to connect to a single VCW2.
V dc Volts direct current
VDSL Very-high-bit-rate Digital Subscriber Line
A technology that enables very high speed asymmetric data transmission
rates over a single twisted-pair copper telephone wire, but at shorter ranges
than other xDSL types. VDSL consists of two versions: VDSL1, which is the
original VDSL, and VDSL2. The 7342 ISAM FTTU supports VDSL2.
VDSL1 is converted to VDSL2 on migration to release FGU 04.05.05 and
higher.
VLAN Virtual Local Area Network
A VLAN divides a physical LAN into multiple virtual LANs whose
members are not necessarily based on location. VLAN specifications are
contained in IEEE 802.1Q.
VOD Video On Demand
A service that allows many users to request the same videos at the same time.
Requires a high-end video server with hundreds of gigabytes of storage.
VoIP Voice over IP
VoIP carries voice transmissions in packets and uses Internet Protocols (IP)
instead of using legacy public switched telephone network (PSTN)
circuit-switched technologies and protocols. VoIP avoids the tolls charged
for POTS.
V-OLT Video Optical Line Termination
VP/VC Virtual Path/Virtual Channel
VRF Virtual Routing and Forwarding
A logical or virtual routing function with associated routing table that can be
instantiated in a router capable of supporting IP VPN services.
W Watt
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