Specifications

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AS/CA S002:2010 COPYRIGHT

OCTOBER 2010

5.5.1.1.2 CE should not recognise as a ring signal an AC voltage of less than

10 V r.m.s., or a ring signal of less than 100 ms duration.

5.5.1.1.3 CE in the OFF-LINE state should withstand 2 min of continuous non-

cadence, 90 V r.m.s. ring signal at 55 Hz superimposed on 48 V d.c.

The ring signal should be applied to the terminals of the CE.

5.5.1.1.4 Under fault conditions, ring signal voltage may also be applied to

the line terminals of the CE which is in the ON-LINE condition. The CE

should remain undamaged if this should occur. A suggested test

configuration is shown in Figure 6.

5.5.1.1.5 When a ring signal of 25 Hz sine wave at 95 V r.m.s. superimposed on

56 V d.c. (with a total source impedance of 470 Ω) is applied to the

line terminals of CE as shown in Figure 7, the DC component of the

current flowing shall not exceed 600 µA.

Compliance with Clause 5.5.1.1 should be checked by using the

method described in Clause 6.7.6.

5.5.1.2 Ringer Equivalence Number (REN)

CE shall have a REN of not greater than 3.

Note 1: The method for determining REN is given in Clause 6.7.6.

Note 2: It is recommended that CE have a REN of not greater than 1 to

allow the parallel operation of other CE.

Note 3: Carrier or carriage service providers may only support a total REN

of 3.

Note 4: The total value of REN for CE operating in parallel is the sum of the

RENs of each CE.

Note 5: As CE may also be required to operate in conjunction with the

standard telephone port of a CSS, the requirements of

AS/CA S003 [4] should also be considered.

Note 6: The REN should be stated on the CE and in the user documentation

to assist customers when connecting multiple CE to a carrier

network.

Compliance with Clause 5.5.1.2 should be checked by using the

method described in Clause 6.7.6.

5.5.1.3 Meter signal detection

5.5.1.3.1 General

5.5.1.3.1.1

A meter pulse received from the PSTN will be a 12 kHz transverse

signal. The availability of this signal is subject to negotiation with the

carrier or carriage service provider concerned.

5.5.1.3.1.2 The meter signal detector is deemed to have operated when an

unambiguous output occurs on the application of an input signal.

The CE supplier should state the expected response of the CE to the

meter signal.