Specifications

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AS/CA S002:2010 COPYRIGHT
OCTOBER 2010
5.7 Automatic Call Transfer Equipment (ACTE)
5.7.1 General Requirements
Some items of CE, including CSS, provide the facility to automatically
transfer calls received from the PSTN, back onto the PSTN.
Note: In the following requirements, Party A is the calling party, Party B is
the originally called party and Party C is the party that Party B wants
calls forwarded to.
5.7.1.1 The following requirements apply to ACTE:
(a) A visual signal should be provided when a call is in progress.
(b) Amplifier
(i) Where an amplifier is used, the gain of the amplifier shall
not exceed 20 dB.
(ii) The amplifier should incorporate AGC for each direction
of speech.
(c) Incoming signals received at a level below –48 dBm on each
line should not turn on the amplifier, if required, from the
quiescent state.
(d) The configuration shall be stable and not oscillate when the
terminating lines have an impedance with a modulus
between 200 Ω and 2 kΩ at a phase angle between –45° and
+20°.
(e) Individual lines shall be automatically released from the
equipment when either Party A or Party B goes OFF-LINE. This
may be achieved by the detection of busy tone, congestion
tone, dial tone, or NU tone at that port.
5.7.1.2 Disconnection of the line by the ACTE shall be achieved within 6.0 s
of Dial Busy, Congestion, or NU Tones being applied to either port of
the ACTE.
5.7.1.3 ACTE without RVA shall not answer an incoming call until Party C has
answered the call.
Note: As a result, Party A will have no indication if Party C is engaged or
does not answer, but will receive ring tone until Party C answers or
the call is released by the PSTN.
5.7.2 Recorded Voice Announcement (RVA) option
5.7.2.1
ACTE which incorporates an RVA should comply with the following
requirements:
(a) On detection of the incoming ring signal the ACTE should
answer the call and transmit an RVA.
(b) This RVA facility should comply with the requirements of
AS/ACIF S004 [5].