ADTRAN 25 manual Specific Feature

GLOSSARY

By technical type these include loop-start, ground-start, DID, data, and automatic ringdown trunks. These facilities may be accessed by their facility access codes (FACS).

Facility Restriction Level (FRL)

A restriction parameter associated with the Automatic Route Selection (ARS) feature.Determines whether a particular station can access a particular trunk.

Fast Busy Tone

See Reorder Tone.

Feature

A specifically defined function or service provided by the system.

Feature Button
A labeled	button on	a voice terminal or attendant console
designating	a specific	feature.
Foreign E x c h a n g e	( F X )

A central office other than the one providing local access to the public telephone n e t w o r k .

Foreign Exchange Trunk

A telecommunications channel that directly connects the system to a central office other than its local central office.

ForeignNumbering Plan Area (FNPA) Code

An area code other than the local area code. The FNPA code must be dialed to call outside the local numbering plan area.

G-8