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between network elements. The words “port” and “line” may often be used
synonymously. “Port” emphasizes the physical interface, and “line” emphasizes the
interconnection. Either may be used to identify the signal being carried.
PWB
Printed Wiring Board
PWDM
Passive Wavelength Division Multiplexing
PWR
Power
PWR ON
Power On
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Q
Q-LAN
Thin Ethernet LAN which connects the manager to Gateway Network Elements so that
management information between Network Elements and management systems can be
exchanged.
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R
RAM
Random Access Memory
Remote Network Element
Any Network Element that is connected to the referenced Network Element through
either an electrical or optical link. It may be the adjacent node on a ring, or N nodes
away from the reference. It also may be at the same physical location but is usually at
another (remote) site.
Ring
A configuration of nodes comprised of network elements connected in a circular fashion.
Under normal conditions, each node is interconnected with its neighbor and includes
capacity for transmission in either direction between adjacent nodes. Path-switched rings
use a head-end bridge and tail-end switch. Line-switched rings actively reroute traffic
over the protection capacity.
Route
A series of contiguous digital sections.
Router
An interface between two networks. While routers are like bridges, they work
differently. Routers provide more functionality than bridges. For example, they can find
the best route between any two networks, even if there are several different networks in
between. Routers also provide network management capabilities such as load balancing,
Glossary
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365-374-187
Issue 1, December 2005
Lucent Technologies - Proprietary
See notice on first page
GL-9