Specifications

VoiceFinder VoIP Gateway Configuration Guide (APOS 2.0) Release Version 3.1
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digital signal processing.
CODEC
Stands for COder-DECoder. CODEC is: 1. A built-in circuit device that converts
analog signals to digital bit streams and vice versa based on a pulse code modulation
method; 2. A DSP software algorithm that compresses or decompresses voice or audio
signals over Voice over IP, Voice over Frame Relay, or Voice over ATM.
Console
A DTE interface through which a command enters a host
CoS
Stands for Class of Service. CoS refers to the standard method that enables a
higher-level protocol to make a lower-level protocol process messages. For the SNA
lower-level area routing, CoS is used to determine the optional path for lower-level
area nodes to set a given session. CoS consists of a virtual path number and a
transmission priority field. Also called ToS
Decryption
Decryption means restoring data to the original non-encrypted state by applying the
encryption algorithm to the encrypted data in reverse.
DHCP
Stands for Dynamic Host Configuration Protocol. DHCP has a mechanism that
reassigns an IP address dynamically in order for the host to recycle unnecessary IP
addresses.
DNS
Stands for Domain Name Server. This is a server system used for the Internet to
convert the name of a network node name to an address.
DS-3
Stands for Digital Signal level 3. This is a frame processing standard used to transmit
digital signals at a rate of T3 (44.736Mbps).
DSP
Stands for Digital Signal Processor. This is a dedicated processor that processes only
digital signals. DSP is used as a sub-processor for voice processing in NEXT.
DTMF
Stands for Dual Tone MultiFrequency. Two voice-band tones are simultaneously used
for dialing (just like touch tones).
E&M
Stands for either recEive and transmit or Ear and Mouth. Typically, this is a trunking
device used for switch-to-switch or switch-to-network two-way communications. The
analog E&M interface of Cisco is a RJ-48 connector for PBX trunk lines. E&M is
available for E1/T1 digital interfaces.
E1
This is a wide area digital transmission technique used mainly in Europe. E1 enables
data transfer at a rate of 2,048Mbps. E1 can be lent by regular service providers for a
private use.
Encryption
Encryption means that a specific algorithm is applied to data in order to convert data
to a form that unauthorized users cannot identify.
Ethernet
Baseband LAN standard initiated by Xerox Corporation and co-developed by Xerox,