Instruction manual

DEFINITY® Business Communications System and GuestWorks® Issue 6
Overview
555-231-208
Issue 1
April 2000
Glossary and Abbreviations
GL-13
DND
Do not disturb
DNIS
Dialed-Number Identification Service
DOD
Direct Outward Dialing
DOSS
Delivery Operations Support System
DS1
Digital Signal Level 1
DS1C
Digital Signal Level-1 protocol C
DS1 CONV
Digital Signal Level-1 converter
DSI
Digital signal interface
DSU
Data service unit
DTDM
Digital-terminal data module
DTE
Data-terminal equipment
DTGS
Direct Trunk Group Select
DTMF
Dual-tone multifrequency
DWBS
DEFINITY Wireless Business System
DXS
Direct extension selection
E
E1
A digital transmission standard that carries traffic at 2.048 Mbps. The E1 facility is divided into 32
channels (DS0s) of 64 kbps information. Channel 0 is reserved for framing and synchronization
information. A D-channel occupies channel 16.
E & M
Ear and mouth (receive and transmit)