Technical information

Glossary
Issue 7 June 2001 GL-5
ETN
Electronic Tandem Network
Enhanced Call Transfer
An AUDIX Voice Mail System feature that provides security by interacting with the PBX system to
validate that the number entered by an AUDIX Voice Mail System caller is a valid extension num-
ber in the dial plan.
Enhanced Private Switched Communications Service
A private telecommunications network that provides advanced voice and data telecommunications
services to companies with many locations.
Electronic Tandem Network
A tandem tie trunk network that has automatic call routing capabilities based on the number dialed
and the most preferred route available at the time the call is placed. Each switch in the network is
assigned a unique private network office code (RNX), and each voice terminal is assigned a
unique extension number.
Extended User Administration of Redirected Calls
Feature that allows station users to select one of two previously administered call coverage paths
assigned to them (for example, a work location coverage path or a remote work location coverage
path) from any on-site extension or from a remote location (for example, home). Also provided is
the ability to activate, change, or deactivate Call Forward Add or Call Forward Busy/Don’t Answer
from any on-site extension or from a remote location.
F
FAC
Feature Access Code; Facility Access Code
FEAC
Forced Entry of Account Code
FNPA
Foreign Numbering-Plan Area
FRL
Facility Restriction Level
FX
Foreign Exchange
Facility Access Code
The code required to access outgoing facilities (trunks).
Facility Restriction Level
Identifies where AAR/ARS/WCR calls can be made and what facilities can be used. FRLs range
from 0 to 7 with the lower numbers being the most restrictive. In an ETN environment, it is passed
along with the call as a Traveling Class Mark.
Facility Test Call
Allows a local voice terminal user or an INADS voice terminal user to call a trunk, touch-tone
receiver, time slot or system tone to see if the facility is working properly.
Feature
A specifically defined function or service provided by the PBX system.