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DEFINITY Enterprise Communications Server Release 6
Installation and Test for Multi-Carrier Cabinets
555-230-112
Issue 5
May 1998
Glossary and Abbreviations
Page GL-24
foreign-exchange (FX)
A CO other than the one providing local access to the public telephone network.
foreign-exchange trunk
A telecommunications channel that directly connects the system to a CO other than its local CO.
foreign numbering-plan area code (FNPAC)
An area code other than the local area code, that must be dialed to call outside the local
geographical area.
FRL
Facilities Restriction Level
FX
Foreign exchange
G
G3-MA
Generic 3 Management Applications
G3-MT
Generic 3 Management Terminal
G3r
Generic 3, RISC (Reduced Instruction Set Computer)
generalized route selection (GRS)
An enhancement to Automatic Alternate Routing/Automatic Route Selection (AAR/ARS) that
performs routing based on call attributes, such as Bearer Capability Classes (BCCs), in addition to
the address and facilities restriction level (FRL), thus facilitating a Uniform Dial Plan (UDP) that is
independent of the type of call being placed.
glare
The simultaneous seizure of a 2-way trunk by two communications systems, resulting in a standoff.
GM
Group manager
GPTR
General-purpose tone receiver
grade of service
The number of call attempts that fail to receive service immediately. Grade of service is also
expressed as the quantity of all calls that are blocked or delayed.
ground-start trunk
A trunk on which, for outgoing calls, the system transmits a request for services to a distant
switching system by grounding the trunk ring lead. To receive the digits of the called number, that
system grounds the trunk tip lead. When the system detects this ground, the digits are sent.
GRS
Generalized Route Selection