Nortel Networks Remote Gateway 50 - Manual (Page 251)

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Main Office Configuration for Survivable Remote Gateway 50 Configuration Guide
256
List of terms
Branch office
An SRG that is remote from the main office. The SRG provides telephony
services using the main office servers (for Normal Mode) or local system
services when the SRG loses IP communication with the main office (Local
Mode).
CDP
Coordinated Dialing Plan. Under the recommended Coordinated Dialing
Plan, the Branch User ID can be an extension (for example, 4567). For more
information about CDP, refer to Dialing Plans: Description (553-3001-183).
dialing plan
Each system uses a specific numbering configuration (dialing plan) that
determines how calls will be handled over a private or public network.
DSP
Digital Signal Processing, which refers to manipulating analog information,
such as sound or photographs that have been converted into a digital form.
DSP also implies the use of a data compression technique.
When used as a noun, DSP stands for Digital Signaling Processor, a special
type of coprocessor designed for performing the mathematics involved in
DSP. Most DSPs are programmable, which means that they can be used for
manipulating different types of information, including sound, images, and
video.
ESA
Emergency Services Access is a feature that places a customer in compliance
with federal legislation that requires the Private 911 type of functionality