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Bridges Hardware Guide

Bridges Hardware Guide Silver Spring Networks 27

Glossary

Access Point (AP) An Access Point is a router that

performs the function of communicating over both a

Wide Area Network (WAN) and the Neighborhood

Area Network (NAN). See also primary Access

Point.

alternate Access Point See secondary Access

Point.

AMR (Automated Meter Reading) A form of ad-

vanced metering that uses communications devic-

es to send data from the meter to the utility. This

includes simple energy consumption data to outage

detection and over-the-air meter programming.

ANSI American National Standards Institute. A stan-

dards organization that administers the standard-

ization and conformity assessment system used in

the U.S. and around the world. When ANSI adopts

a standard, it disseminates a code to identify the

standard. For example, ANSI Standard C12.19.

asynchronous In networking communications, an

asynchronous signal occurs without a correspond-

ing request for that signal. A last gasp from a meter

is an example of an asynchronous signal.

attenuation The decrease in amplitude of a signal

during its transmission from one point to another.

backbone device Normally a poletop device such as

an Access Point or a Relay. In some cases, a meter

that acts as a relay can be designated as a back-

bone device. In some cases, a Relay may not be a

backbone device. All backbone devices are includ-

ed in the backbone ping schedule.

backhaul To transmit data to a point from which it can

be sent over a network (hauled back) to the data

center.

bandwidth The amount of data transmitted in a given

amount of time, usually measured in bits per sec-

ond, kilobits per second, or megabits per second.

C&I (Commercial & Industrial) The reference to

commercial and industrial energy and water cus-

tomers.

capacitor bank Used to improve electric power sys-

tem efficiency and to aid in transmission voltage

stability during disturbances.Two varieties exist:

distribution capacitor banks and substation capaci-

tor banks. An example of an RTU device.

CDMA Code-Division Multiple Access. A digital wire-

less technology that uses spread spectrum technol-

ogy to send its signals over a wider bandwidth than

the original signal.

child A meter that is associated with a Relay is a child

of that Relay. Similarly, a Relay is a child of the Ac-

cess Point to which it is associated. A meter can

also be a child of another meter. In this case, the

parent meter is acting as a Relay.

churn Refers to endpoint devices recalculating the

egress route to their preferred Access Point on a

frequent basis. This is a sign of network instability

because an endpoint’s IP address may become

stale, resulting in missed reads.

crumb A single node in a series of hops comprising a

source-routed path. As a source-routed path is de-

fined by the Master bridge or an Access Point, each

hop in the dedicated downstream path is termed a

‘crumb’ as in a trail of ‘bread crumbs.’

Customer Premise Equipment (CPE) Customer

Premise Equipment is all telecommunications ter-

minal equipment located on the customer premis-

es, such as a cable modem, router, or access point.

DA-NEM Distribution Automation-Network Element

Manager. A software application that allows users

to manage the devices comprising a DA network.