Specifications

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AS/CA S002:2010 COPYRIGHT
OCTOBER 2010
4.2.20 Ring-in/Loop-out PSTN line
A both-way call set-up line connection with the PSTN. Incoming
signalling to CE is by the application of a ring signal at the PSTN
exchange. Outgoing signalling from CE is by the application of a DC
loop at the CE.
4.2.21 Ringer Equivalence Number (REN)
An approximate value of loading presented to the line during the
ringing state, and based on the capacitance applied to the line
when the CE is OFF-LINE.
4.2.22 Seizure state
The initial period after the CE enters the ON-LINE condition.
4.2.23 Standard Telephone Service
Refer to Section 6 of the Telecommunications (Consumer Protection
and Service Standards) Act 1999.
4.2.24 Standard Telephone Service Customer Equipment
Customer Equipment designed or intended to interface with a
standard telephone service.
4.2.25 Tandem operation
Tandem operation refers to the ability of CE to present an interface
modelling a PSTN interface to third party CE (referred to as
terminating CE).
4.2.26 Telecommunications Network
Refer to Section 374(1) of the Telecommunications Act 1997.
4.2.27 Telecommunications Reference Conductor (TRC)
A conductor that can be used for signalling and other functional
purposes which may include equipment reliability. Integral surge
suppression devices within Customer Equipment may be connected
to the TRC.
4.2.28 Telephone typewriter
Customer Equipment primarily used by people who are deaf or
hearing impaired to communicate using text. Also known as TTY or
text telephone.
4.2.29 Twist
The greatest loss differential between any two frequencies within
one of the bands (upper and lower) of a tone signalling scheme.
4.2.30 Voice Frequency (VF)
Those frequencies in the range of 300 Hz to 3.4 kHz.