Specifications
- 16 -
AS/CA S002:2010 COPYRIGHT
OCTOBER 2010
(b) If the CE provides local DC feed to the terminating STS CE,
then the CE shall meet the requirements for
Answer/Seizure/Hold signals and Idle/Release signals of
Standard analogue telephone Local Port (On Premises and Off
Premises) in AS/CA S003 [4].
(c) If the CE allows voice frequency signals to pass from the
terminating STS CE to the PSTN port when the PSTN port is in the
ON-LINE condition, then the CE shall meet—
(i) the relevant Transmission Requirements of AS/CA S003 [4]
between the port of the CE, to which the terminating CE
connects, and the PSTN connection of the CE; or
(ii) the requirements of Clause 5.2.3.2.
5.2.3 Series equipment
5.2.3.1
Series equipment is CE that is connected to the line in series with line-
terminating equipment.
5.2.3.2 The following requirements apply to series equipment which is
connected and operates with another CE which is either in the ON-
LINE condition, or which remain in the circuit at all times:
(a) There shall be DC continuity between the input and output
connections of the equipment.
(b) CE with linear electrical characteristics shall have a maximum
total DC resistance of 55 Ω.
(c) For CE with ON-LINE electrical characteristics, the total DC
voltage drop across the line connections shall not exceed—
(i) 3 V with line currents up to 30 mA; and
(ii) 6 V for all line currents greater than 30 mA.
(d) The insertion loss of the equipment on lines of all lengths shall
not exceed 0.5 dB over the range 300 Hz to 3.4 kHz when
measured with source and load impedances as shown in
Figure 5.
Compliance with Clause 5.2.3.2 should be checked by measuring
the DC resistance, the DC voltage drop and the insertion loss (see
Clause 6.7.4), as appropriate.
5.2.3.3 Series equipment which is connected to and operates with another
CE which is in the OFF-LINE condition shall not reduce ring voltage
with frequency in the range 15.3 Hz to 50 Hz, to below 50 V r.m.s, for
a connection configuration as shown in Figure 24.
Compliance with Clause 5.2.3.3 should be checked by using the
method described in Clause 6.7.1.2 and Figure 24.