Specifications

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AS/CA S002:2010 COPYRIGHT

OCTOBER 2010

2.5 s. The answering tone should be in the range from –7 dBm

to –13 dBm; or

tone, busy tone, or NU tone, as described in Appendix A.

Compliance with Clause 5.3.5.3.2 should be checked by using the

method described in Clause 6.7.9 as appropriate.

5.3.5.4 Commencement of dialling

5.3.5.4.1

CE which is not able to detect dial tone shall not commence dialling

earlier than 2.7 seconds after the seizure state as specified in

Clause 5.5.1.4 has been established.

Note: A time delay not exceeding 6 seconds is recommended.

5.3.5.4.2 CE which is able to detect dial tone may commence dialling after

the presence of dial tone has been detected.

Compliance with Clause 5.3.5.4 should be checked by operation

and inspection.

5.3.5.5 Automatically repeated call attempts

5.3.5.5.1

CE shall provide a minimum OFF-LINE period of 5 s following the

termination of an unsuccessful call attempt before automatically

initiating a subsequent call attempt in a repeated call attempt

sequence.

5.3.5.5.2 CE shall not automatically initiate more than 15 call attempts,

including the initial call, in a repeated call attempt sequence.

5.3.5.5.3 If the call attempt sequence described in Clauses 5.3.5.5.1 and

5.3.5.5.2 is unsuccessful, CE shall not automatically re-initiate the call

attempt sequence to the same number.

5.3.5.5.4 CE should provide a minimum OFF-LINE period of 5 s following the

termination of an unsuccessful call attempt sequence before

automatically initiating a new call attempt sequence to a different

number.

Note 1: The interval between repeat call attempts in most practical

applications should be set to a value considerably greater than the

minimum allowed value so as to provide an appropriate

compromise between the rate of redialling and the likelihood of the

repeat call attempt being successful, taking into account the

typical holding time for calls.

Note 2: It is highly recommended that CE which provides the automatic

repeat call function should incorporate service tone detectors

which meet the requirements of Clause 5.3.5.2, in order to improve

functionality and reduce loop holding times for unsuccessful call

attempts.

Compliance with Clause 5.3.5.5 should be checked by operation

and inspection.