User's Manual

PMP 450 Planning Guide Glossary
Term Definition
DiffServ Differentiated Services, consistent with RFC 2474. A byte in the type of service (TOS)
field of packets whose values correlates to the channel on which the packet should be
sent. The value is a numeric code point. Cambium modules map each of 64 code points
to values of 0 through 7. Three of these code points have fixed values, and the
remaining 61 are settable. Values of 0 through 3 map to the low-priority channel; 4
through 7 to the high-priority channel. The mappings are the same as 802.1p VLAN
priorities. (However, configuring DiffServ does not automatically enable the VLAN
feature.) Among the settable parameters, the values are set in the AP for all downlinks
within the sector and in the SM for each uplink.
Disable To turn off a feature in the module after both the feature activation file has activated
the module to use the feature and the operator has enabled the feature in the module.
See also Activate and Enable.
DMZ Demilitarized Zone as defined in RFC 2647. An Internet Protocol area outside of a
firewall. See http://www.faqs.org/rfcs/rfc2647.html
.
Dynamic Frequency
Selection
A requirement in certain countries and regions for systems to detect
interference from other systems, notably radar systems, and to avoid co-channel
operation with these systems.
Dynamic Host
Configuration
Protocol
See DHCP.
Electronic Serial
Number
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. Same as MAC Address.
Enable To turn on a feature in the module after the feature activation file has activated the
module to use the feature. See also Activate.
ESN Electronic Serial Number. 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. Same as MAC Address.
EthBusErr Field This field displays how many Ethernet bus errors occurred on the Ethernet controller.
Ethernet Protocol Any of several IEEE standards that define the contents of frames that are transferred
from one network element to another through Ethernet connections.
Fade Margin The difference between strength of the received signal and the strength that the receiver
requires for maintaining a reliable link. A higher fade margin is characteristic of a more
reliable link. Standard operating margin.
FCC Federal Communications Commission of the U.S.A.
Field-programmable
Gate Array
Array of logic, relational data, and wiring data that is factory programmed and can be
reprogrammed.
IV
pmp-0047 (March 2014)