AS CA-S041.2 pdf download – Requirements for DSL Customer Equipment for connection to the Public Switched Telephone Network — Part 2: Modems for use in connection with all DSL services
Categories of requirements
This Standard contains mandatory requirements as well as provisionsthat are recommendatory only. Mandatory requirements are
designated by the words ‘shall’or ‘shall not’ . All other provisions arevoluntary.
Compliance statements, in italics, suggest methodologies fordemonstrating CE’s compliance with the requirements.
Definitions, expressions and terms
lf there is any conflict between the definitions used in this Standardand the definitions used in the Telecommunications Act 1997, thedefinitions in the Act take precedence.
Text denoted as ‘Note’is for guidance in interpretation and is shownin smaller size type.
(a)Applicable editions (or versions) of other documents referred
to in this Standard are specified in Section 3: REFERENCES.(b)lf a document refers to another document, the other
document is a sub-referenced document.
(c)where the edition (or version) of the sub-referenced
document is uniquely identified in the reference document,then that edition (or version) applies.
(d)Where the edition (or version) of the sub-referenced
document is not uniquely identified in the reference
document, then the applicable edition (or version) is thatwhich is current at the date the reference document is
legislated under the applicable regulatory framework, or for anon- legislated document, the date upon which the
document is published by the relevant standards organisation.(e)A number in square brackets ‘’ refers to a document listed in
Section 3: REFERENCES.
Units and symbols
ln this Standard the lnternational System (Sl) of units and symbols isused in accordance with Australian Standard As ISO 1000.
2.1 This Standard specifies the technical requirements for DSL Modem Customer Equipment (CE), or the DSL Modem parts of the CE that are designed orintended for connection to a DSL service that shares the metallic local loopwith an analogue PSTN two-wire service.
2.2 This Standard does not apply to CE or the parts of CE designed or intended for connection only to an analogue PSTN two-wire service.
2.3 CE that is designed or intended to operate in an all digital mode does not need to meet the requirements of this Standard for that particular mode.Note: CE which operates in an all digital mode is in relation to a service provided
over a metallic local loop not shared with an analogue PSTN service.
2.4 CEis not excluded from the scope of this Standard by reason only that it is capable of performing functions additional to those listed in this Standard.Note 1: For the purposes of this scope DsL modems are examples of CE designed for connection to a DSL service operating over a shared metallic localloop with an analogue PSTN two-wire service.
Note 2: AS/CASO02specifies the technical requirements for connection to an
analogue PSTN two-wire service.
5.1 General Part 2 of AS/CA S041 lists specific requirements that apply to CE that perform the function of a DSL modem. General requirements are covered in Part 1 of AS/CA S041 . The following requirements apply to CE which is a DSL modem, or part of a CE performing the function of a DSL modem.
5.2 PSTN line properties
5.2.1 DSL Line Impedance The impedance that DSL modem CE presents to the line shall have a modulus of impedance greater than or equal to the impedance limits defined in the Table 1 and Figure 1 . Note: Clause
5.2.1 is based on the requirements in ETSI ES 202 91 3  with the limits from ITU-T Rec. G.992.1 .