Installation guide

Synapse Installation Guide Back to Contents
Glossary 162
Call Forward–No Answer: Automatically forward unanswered calls to Voicemail, an
extension, or outside phone number
call screening: Listening to a Voicemail message while it is being recorded
Cat.-5 wiring: A twisted pair data cable commonly used in offices for computer
communication
CO (Central Office): An office to which subscriber home and business lines are
connected. The central office has switching equipment that can switch calls locally or to
long-distance carrier phone offices.
CPT (Call Progress Tones): Audible tones sent from the telephone company central
office to indicate the status of phone calls such as ringback and busy tones
CSU (Channel Service Unit): A line-bridging device that is part of the PSTN, that resides
on the customer premises and is connected to Synapse, and is also used to perform
loopback and other tests on T1 connections. This device is typically provided by the T1
phone service provider.
DECT (Digital Enhanced Cordless Telecommunication): A wireless telephone
technology developed specifically for cordless telephones using frequencies between 1.8
and 1.9 Gigahertz. DECT communication is resistant to interference from other electronic
equipment, has longer range, and improved battery life
default: The original product settings
deregister: To remove the association between an SB67030/031 Deskset and a Cordless
Handset or Cordless Headset
DHCP (Dynamic Host Configuration Protocol): A network protocol that automatically
assigns computer IP addresses
dial pad: The 0 through 9, *, and # keys on the Deskset and the SB67040 Cordless
Handset
direct dial: Allows callers to directly dial users' extension numbers after the Auto
Attendant answers
Directory: A list of names and phone numbers
Display Names: The names that the system administrator enters to identify each
extension number. The Auto Attendant uses these names to assist callers in forwarding
calls.
DID: This feature allows outside caller to directly dial an extension, bypassing the Auto
Attendant and the operator
DND (Do Not Disturb): A feature that suppresses audible ringing and incoming paging
at the Deskset
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