Specifications

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AS/CA S002:2010 COPYRIGHT

OCTOBER 2010

5.5.1.3.1.3 The meter signal detector should recognise meter signals in the

range 100 ms to 380 ms inclusive, at a maximum repetition

frequency of 1.25 Hz.

5.5.1.3.1.4 The meter signal detector should not respond to—

(a) meter signals less than 50 ms duration;

(b) meter signals greater than 500 ms duration; and

initiated for an outgoing call.

5.5.1.3.1.5 The meter signal detector should be responsive—

(a) after completion of address signalling;

(b) during the release condition of the CE (as specified in

Clause 5.5.1.11); and

5.5.1.3.1.6 Where CE is detecting the Meter Pulse in accordance with the

requirements of this Standard and Reversal on Answer in

accordance with the requirements of AS/CA S003 [4], 50 ms after

the application of a polarity reversal the CE should be able to

detect Meter Pulses that occur.

5.5.1.3.2 12 kHz Transverse Meter Signal Detection Requirements

Where CE is designed to detect 12 kHz transverse meter signals, the

following requirements are applicable:

(a) The meter signal detector should meet the response limits

given in Figure 8.

(b) The transverse input impedance shall have a modulus of

impedance of greater than 200 Ω with a phase angle of 0° to

–30° at 12 kHz.

Compliance with Clause 5.5.1.3 should be checked by using the

method described in Clause 6.7.7.

5.5.1.4 Seizure state

5.5.1.4.1 During the seizure state the CE acting as a line termination, for a

minimum duration of 0.3 s, shall have DC characteristics not within

the ‘Prohibited’ Region A and preferably not within the ‘Not

Recommended’ Region B of Figure 9.

5.5.1.4.2 Momentary breaks during the seizure state shall not exceed 2.5 ms.

5.5.1.4.3 The duration of the transition from the idle state to the low resistance

state (i.e. line current rise time) should not exceed 100 ms.

Compliance with Clause 5.5.1.4 should be checked by using the

method described in Clause 6.7.10.