User guide

March 2005 Glossary
Through Software Release 6.1
Page 418 of 425 Issue 1
Canopy System User Guide
Late Collision Field
This field displays how many late collisions occurred on the Ethernet
controller. A normal collision occurs during the first 512 bits of the
frame transmission. A collision that occurs after the first 512 bits is
considered a late collision. A late collision is a serious network
problem because the frame being transmitted is discarded. A late
collision is most commonly caused by a mismatch between duplex
configurations at the ends of a link segment.
Latency Tolerance
Acceptable tolerance for delay in the transfer of data to and from a
module.
Line of Sight
Wireless path (not simply visual path) direct from module to module.
The path that results provides both ideal aim and an ideal Fresnel
zone.
Linux
A registered trademark of Linus Torvalds.
LNK/5
Furthest left LED in the module. In the operating mode, this LED is
continuously lit when the Ethernet link is present. In the aiming mode
for a Subscriber Module or a Backhaul timing slave, this LED is part of
a bar graph that indicates the quality of the RF link.
Logical Unit ID
Final octet of the 4-octet IP address of the module.
LOS
Line of sight. The wireless path (not simply visual path) direct from
module to module. The path that results provides both ideal aim and
an ideal Fresnel zone.
LUID
Logical Unit ID. The final octet of the 4-octet IP address of the module.
MAC Address
Media Access Control address. The hardware address that the factory
assigns to the module for identification in the Data Link layer interface
of the Open Systems Interconnection system. This address serves as
an electronic serial number.
Management
Information Base
Space that allows a program (agent) in the network to relay
information to a network monitor about the status of defined variables
(objects).
Master
Designation that defines the role of a component relative to the role of
another. This designation both applies to a Backhaul module that
provides synchronization over the air to another Backhaul module
(a Backhaul timing slave) and applies to a Bandwidth and
Authentication Manager (BAM) server whose SQL database is
automatically copied onto a redundant BAM server (BAM slave). In
each case, the master is not a product. Rather, the master is the role
that results from deliberate configuration steps.
Media Access Control
Address
Hardware address that the factory assigns to the module for
identification in the Data Link layer interface of the Open Systems
Interconnection system. This address serves as an electronic serial
number.