Appendix B - Abbreviated Index
Telephony Hardware:
acoustic coupler
aerial cable
aerial insert
applique
central office (C.O.)
combined distribution frame (CDF)
common battery
conditioned loop
connecting arrangement
cord circuit
cord lamp
cordless switchboard
crossbar switch
cross-connection
cross-office trunk
customer office terminal (COT)
customer service unit (CSU)
dial switching equipment
digital access and cross-connect system (DACS)
digital circuit patch bay
digital loop carrier (DLC)
digital primary patch bay
digital switch
distribution frame
drop
DSA board
D-type patch bay
electrically powered telephone
embedded base equipment
embedded customer-premises equipment
end instrument
end office
entrance facility
entrance point
entrance room
equal-level patch bay
equipment room
equipment side
exchange
exchange facilities
extension bell
four-wire repeater
grandfathered systems
grandfathered terminal equipment
group distribution frame (GDF)
high-frequency distribution frame (HFDF)
individual line
inside plant
integrated station
intercom
intermediate distribution frame (IDF)
interoffice trunk
interposition trunk
interswitch trunk
intertoll trunk
intraoffice trunk
key set
key telephone system (KTS)
K-type patch bay
limited-protection voice equipment
line side
local battery
local exchange loop
local side
main distribution frame (MDF)
main station
master frequency generator
MM patch bay
new customer premises equipment
office classification
off-premises extension (OPX)
on-premises extension
orderwire multiplex
outside plant
patch and test facility (PTF)
plant
private exchange (PX)
private line
proration
protected distribution system (PDS)
public switched telephone network (PSTN)
rack
repertory dialer
rotary dial
SECORD
semiautomatic switching system
signal center
sound-powered telephone
special grade access line
splice closure
station battery
STU
supergroup distribution frame (SGDF)
switchboard
switched circuit
switched loop
tandem center
tandem office
technical control facility (TCF)
Telecommunications Device for the Deaf (TDD)
telecommunications facilities
telephone
terminal equipment
through-group equipment
through-supergroup equipment
tie trunk
translator
tributary office
videophone
vodas
vogad
voice frequency (VF) primary patch bay
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