Category B31 of the ACMA Telecommunications Labelling Notice

Customer equipment that have interfaces for telephone extensions are covered under Category B31 of the Telecommunications Labelling Notice. Category B31 identifies an interface on customer equipment that provides the functionality of an extension port or tie-line port as defined in AS/ACIF S003.

This includes equipment that has an Ethernet, hybrid fibre-coax (HFC) or optical connection, where telephony services are provided via an extension port that supports an item of terminal equipment such as a telephone, fax machine or answering machine.

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