Specifications

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AS/CA S002:2010 COPYRIGHT
OCTOBER 2010
Compliance with Clause 5.3.5.1 should be checked by operation
and inspection.
5.3.5.2 Recognition of Telecommunications Network service tones
CE which relies on the detection of specific pre-answer service tones
for automatic operation shall operate normally on receipt of those
service tones as transmitted from the Telecommunications Network
over the range –9 dBm to –24 dBm and for nominal frequency and
cadence as detailed in Appendix A. CE for use on international
connections should respond to the tones described in the Annex to
ITU Operational Bulletin Nr. 781 [12].
Note 1: The public network post dialling delay will rarely exceed 12 s, but
may in extreme cases be up to 20 s. This does not include any
delay that may occur within a private network or as a result of a
call redirected from a private network/CE into the PSTN.
Note 2: CE suppliers should nominate to the test house the response or
responses (if any) expected from the CE when service tones are
applied to the CE.
Note 3: The levels encountered in the Telecommunications Network may
be outside the test levels specified above and are indicated in
Appendix A.
Compliance with Clause 5.3.5.2 should be checked by using the
method described in Clause 6.7.13 and Figure 23.
5.3.5.3 Answering of incoming calls
5.3.5.3.1
CE incorporating automatic answering facilities which answer an
incoming call, for a Ring-in/Loop-out PSTN line interface, should
apply a loop (Answer) to the line in not less than 2 s from the
commencement of the ring signal being applied by the PSTN.
Note 1: Where CE is intended to receive carrier supplied calling number
identity signals, it is recommended that Answer is not applied prior
to 5.5 s.
Note 2: It is recommended that where Distinctive Ring cadence
recognition is performed by CE, that the CE examines at least one
complete cadence cycle before any decision is made.
Note 3: A maximum time limit of 15 s to answer is recommended.
Compliance with Clause 5.3.5.3.1 should be checked by inspection.
5.3.5.3.2 CE incorporating automatic answering facilities shall acknowledge
the answering of incoming calls from the PSTN by
—
(a) the transmission of an appropriately worded stored voice or
synthesised voice message; or
(b) the transmission of one burst of answering tone of
2100 Hz ±15 Hz for a minimum of 2.6 s up to a maximum of 6.0 s,
if a calling tone (CNG) as defined in ITU-T Recommendation
V.25 [22] has not been received from the originating CE within