Specifications

- 22 -

AS/CA S002:2010 COPYRIGHT

OCTOBER 2010

5.3.5.6 Calling message

If a CE transmits a voice message after an automatically initiated

call is answered, then that CE should include, in the voice message

itself, a stored or synthesised message which identifies the calling

party.

Compliance with Clause 5.3.5.6 should be checked by operation

and inspection.

5.3.5.7 Call supervision

CE which automatically originates or answers calls should be

designed to release the PSTN exchange line in less than 30 s after the

conclusion of the transfer of information to or from the other CE in

the connection.

Note: Failure to incorporate a clearing signal after the completion of

information transfer in either direction can result in PSTN call lockup

and continuation of call charging.

Compliance with Clause 5.3.5.7 should be checked by timing and

inspection.

5.4 Transmission requirements

5.4.1 Operational interference for transmission other than speech

and music

CE shall not transmit single frequency tones of power greater than

–47 dBm and duration greater than 40 ms in the frequency range

2450 Hz to 2850 Hz (to avoid possible interference with ‘in-band’

VF signalling).

Note: CE should not transmit single frequency tones of power greater than

–47 dBm and duration greater than 40 ms in the band 1900 Hz to

2350 Hz except for the purpose of disabling echo control devices.

Compliance with Clause 5.4.1 should be checked by using the

method described in Clause 6.7.9.

5.4.2 Power and voltage limits of transmissions other than speech

and music

5.4.2.1

Clauses 5.4.2.2 and 5.4.2.3 do not apply to CE which is a transmission

medium for voice frequency signals that are generated by other CE.

5.4.2.2 The peak-to-peak level of signals transmitted to line, under all user

accessible gain control settings and with all DC line conditions, shall

not exceed 5.0 V when measured across a 600 Ω resistive

termination.

Compliance with Clause 5.4.2.2 should be checked by using the

method described in Clause 6.7.9.4 with R in Figure 23 set to 600 Ω.