Symbol Technologies 1813-A2-GB20-00 User Manual

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1813 VoIP Gateway User’s Guide

bridge:

A device that links local or remote area networks together, forwarding packets based on

a MAC address (compare with Gateway).

broadband:

Communication channels operating at transmission rates in excess of 64 kbps.

broadcast:

The simultaneous transmission to two or more communication devices.

Burst Tolerance. The limit parameter of the Generic Cell Rate Algorithm (GCRA).

buffer:

A temporary storage used to compensate for a difference in the rate of flow of data.

bus:

An assembly of conductors that carries signals to and from devices along its path and

serves as a common connection for a group of related devices.

busy:

A device’s operational state, when the device is occupied with processing a call.

Byte:

Eight bits arranged in sequence.

channel:

A bi-directional communications pathway between a host server and a client.

CHAP:

Challenge-Handshake Authentication Protocol. A PPP protocol to ensure authentication

of the connection between two devices.

circuit:

A logical connection between two devices.

CO:

Central Office, the local telephone exchange, also called PSTN.

COM port:

A computer’s serial communications port.

CPE:

Customer Premises Equipment. Equipment used by the end user.

cross talk:

Undesired coupling of a signal from one circuit, or channel, to another.

data rate:

The speed measured in bits per second that data is transferred over the carrier line.

Default:

A pre-defined original value.

demodulation:

The recovery, from a modulated carrier, of a signal.

DHCP server:

A server that dynamically allocates network addresses and delivers

configuration parameters to hosts.

DHCP:

Dynamic Host Configuration Protocol. A TCP/IP protocol that enables a network

connected to the Internet to automatically assign a temporary IP address to a host when the host
connects to the network.

digital signal:

A discrete or discontinuous signal where the states are discrete intervals apart,

such as +10 volts and –10 volts. These states are then represented by the binary digits 0 and 1.

digital: loopback test:

A test that connects the device’s receiver output back to the transmitter

input. This test will disrupt the transmission of primary data.

DLL:

Dynamic Link Library. DLLs are files that are automatically loaded into memory when

required.