User's Manual

PMP 450 Planning Guide
Glossary
pmp-0047 (June 2013)
III
Term
Definition
CIR
Committed Information Rate. For an SM or specified group of SMs, a level of
bandwidth that can be guaranteed to never fall below a specified minimum (unless
oversubscribed). In the Cambium implementation, this is controlled by the Low
Priority Uplink CIR, Low Priority Downlink CIR, High Priority Uplink CIR, and High
Priority Downlink CIR parameters.
CLIP
Cassegrain Lens for Improved Performance
Cluster
Management
Module
Module that provides power, GPS timing, and networking connections for an AP
cluster. Also known as CMM.
CMM
Cluster Management Module. A module that provides power, GPS timing, and
networking connections for an Access Point cluster.
CodePoint
See DiffServ.
Color Code Field
Module parameter that identifies the other modules with which communication is
allowed. The range of valid values is 0 to 255.
Community String
Field
Control string that allows a network management station to access MIB information
about the module.
CRCError Field
This field displays how many CRC errors occurred on the Ethernet controller.
Data Encryption
Standard
Over-the-air link option that uses secret 56-bit keys and 8 parity bits. Data Encryption
Standard (DES) performs a series of bit permutations, substitutions, and recombination
operations on blocks of data.
Demilitarized Zone
Internet Protocol area outside of a firewall. Defined in RFC 2647. See
http://www.faqs.org/rfcs/rfc2647.html.
DES
Data Encryption Standard. An over-the-air link option that uses secret 56-bit keys and
8 parity bits. DES performs a series of bit permutations, substitutions, and
recombination operations on blocks of data.
Desensed
Received an undesired signal that was strong enough to make the module insensitive to
the desired signal.
DFS
See Dynamic Frequency Selection
DHCP
Dynamic Host Configuration Protocol, defined in RFC 2131. Protocol that enables a
device to be assigned a new IP address and TCP/IP parameters, including a default
gateway, whenever the device reboots. Thus DHCP reduces configuration time,
conserves IP addresses, and allows modules to be moved to a different network within
the system. See http://www.faqs.org/rfcs/rfc2131.html. See also Static IP Address
Assignment.