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Syn248 Installation and Configuration Guide Back to Contents
Glossary 113
DND ON: An indicator in the top right corner of the Deskset display that illuminates when
you turn on the Do Not Disturb feature
DNS (Domain Name System) server: A server that stores the Domain Name System
records, such as address, name server, and mail exchanger records for a domain name
and responds with answers to queries against its database
DSL (Digital Subscriber Line): High-speed Internet service through your telephone line.
Telephone lines with DSL service require DSL filters to separate the telephone and data
signals.
DTMF (Dual-Tone Multi-Frequency): Telephone tones commonly known as “touch-tone”
dynamic IP address: An IP address that is automatically assigned by the server
Emergency Bypass Port: The fifth SB35010 Gateway jack that can provide telephone
operation during a power failure when used with an analog phone
Ethernet: A type of computer networking technology that connects devices via Local
Area Networks (LANs)
Extension list: A list of names and extension numbers for the Syn248 system telephones
extension number: The three-digit number representing each individual Deskset
factory default: The original product settings
FXO (Foreign Exchange Office): The Gateway telephone signaling interface between the
telephone lines and the LAN
Gateway: A network device equipped for interfacing with another network that uses
different protocols
greeting, preset: The voice message that plays to callers if the user has not recorded an
outgoing message
grounding: An electrical ground connection that minimizes interference, reduces the risk
of equipment damage due to lightning, eliminates electrostatic buildup, and helps protect
people who service the equipment
hard key: Any physical key on the Deskset or Gateway. Examples include MENU and 1.
hard reset: An action that restores factory default settings
Hold announcement: A recorded message to play while calls are on hold.
hub: A network hub or repeater hub is a device for connecting electronic devices, making
them act as a single link
hunt group: A telephone company feature that allows calls to a busy phone number to
roll over to the next available line
icon: A small picture in the display that presents status information
Idle: The mode of a device when it is not involved in call or call setup activity
Intercom call, internal call: A phone call placed from one of your Syn248 system
extensions to another extension
interference: Electrical signals close by that cause degraded audio performance for
cordless devices
114


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