AS CA-S043.3:2015 Requirements for Customer Equipment for connection to a metallic local loop interface of a Telecommunications Network
5.1 DC signals
If CE can deliver DC signals, the CE is to comply with the following requirements:
(a) DC signals shall not exceed the TNV-3 limits specified in AS/NZS 60950.1 [2], when measured at the output terminals of the equipment on open circuit.
(b) When DC signals are reversed in polarity for signalling,telemetry or metering purposes, the resulting impulses measured with an instrument incorporating a filter in accordance with ITU–T Rec. O.71 [9] shall not exceed a threshold level of –32 dBm.
Note: These requirements align with ITU–T Rec. Q.45 bis [1 0] for impulse noise.
Compliance with Clause 5.1.1 should be checked by using the methods described in Clauses 6.3.1 and 6.3.2.
5.2 Low frequency AC signals
If CE can deliver AC signals below 300 Hz, the CE is to comply with the following requirements:
(a) AC signals up to 1 00 Hz delivered by the CE, including ringing signals, shall not exceed the TNV-3 limits specified in AS/NZS 60950.1 [2], when measured at the output terminals of the equipment on open circuit.
(b) Signals between 1 00 Hz and 200 Hz delivered by the CE shall not exceed 1 0 V r.m.s. at the output terminals of the equipment on open circuit.
(c) Signals between 200 Hz and 300 Hz delivered by the CE shall not exceed 5.0 V peak to peak at the output terminals of the CE on open circuit.
5.3.1 The peak-to-peak level of signals transmitted to line shall not exceed 5.0 V when measured across a 600 resistive termination.
Compliance with Clause 5.3.1 should be checked by using the method described in Clause 6.3.4.3.
5.3.2 The one-minute mean power level of signals transmitted to line within the frequency range 300 Hz to 3.4 kHz, except for speech and music, shall not exceed –1 0 dBm.
Compliance with Clause 5.3.2 should be checked by using the methods described in Clauses 6.3.4.1 and 6.3.4.2 with R in 6.3.4.1 set
to 600.
5.3.3 The normal operating level of speech and music shall not exceed –6 VU.
Compliance with Clause 5.3.3 should be checked by using the methods described in Clauses 6.3.4.6.