User guide

Preface 19
Telephone Features Programming Guide
Emergency 911 Dialing
Emergency 911 dialing is the capability to access a public emergency response system.
State and local requirements for support of Emergency 911 dialing service by Customer Premises
Equipment vary. Ask your local telecommunications service provider about compliance with
applicable laws and regulations.
Emergency 911 dialing may not apply to International systems.
IP telephones: If you allow this service on IP telephones that are installed or used off-site, you
must ensure that the 911 telephone number is not mapped to the system address in the emergency
response system.
DISA Direct Inward System Access
DN Directory Number (Extension Number)
DND Do Not Disturb
DLR Distinctive Line Ring
DRP Distinctive Ring Pattern
DRT Delayed Ring Transfer
ERC Express Routing code
HS Hospitality Services
IP Internet Protocol
ISDN Integrated Services Digital Network
ISO International Organization for Standardization
PBX Private Branch Exchange
PRI Primary Rate Interface
RC Room Condition
RJXX Registered Jack XX (Where XX is used to denote numbers, for
example: 45 or 5.)
RO Room Occupancy
SLR Selective Line Redirection
SWCA System-wide call alert
URL Uniform Resource Locator