Cambium PTP 450 series, User Manual

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PMP 450 Configuration and User Guide Glossary
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ptp-450 (July 2014)
IPv4 Traditional version of Internet Protocol, which defines 32-bit fields for data
transmission.
IBHS Industrial, Scientific, and Medical Equipment radio frequency band, in the 5.8-GHz
ranges.
L2TP over IPSec Level 2 Tunneling Protocol over IP Security. One of several virtual private network
(VPN) implementation schemes. Regardless of whether Subscriber Modules have the
Network Address Translation feature (NAT) enabled, they support VPNs that are based
on this protocol.
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.
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, 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).
Maximum
Information Rate
(MIR)
The cap applied to the bandwidth of an BHS or specified group of BHSs. In the
Cambium implementation, this is controlled by the Sustained Uplink Data Rate, Uplink
Burst Allocation, Sustained Downlink Data Rate, and Downlink Burst Allocation
parameters.
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.
MIB 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).
MIR See Maximum Information Rate.