ETSI - PRTBR 21
Terminal Equipment (TE); Attachment Requirements for Pan-European Approval for Connection to the Analogue Public Switched Telephone Networks (PSTNs) of TE (Excluding TE Supporting the Voice Telephony Service) in Which Network Addressing, if Provided, is by Means of Dual Tone Multi Frequency (DTMF) Signalling
|Publication Date:||1 January 1996|
This Technical Basis for Regulation (TBR) specifies the technical characteristics (electrical and mechanical interface requirements and access control protocol) under Articles 4(d) and 4(f) of Directive 91/263/EEC to be provided by a single Terminal Equipment (TE) which is:
- intended for pan-European approval; and
- capable of 2-wire access to an analogue Public Switched Telephone Network (PSTN) line at the Network Termination Point (NTP); but
- excluding TE which is capable of supporting the voice telephony justified case service as specified in Article 4(g) of Directive 91/263/EEC.
The objective of this TBR is to ensure that no harm occurs to the public network, and to ensure interworking between network and terminal so that calls can be routed successfully through the network, but without any guarantee of terminal to terminal interoperability. There are no requirements in this TBR under Article 4(g) of Directive 91/263/EEC
This TBR covers TE which is capable of originating a circuit-switched call using Dual Tone Multi Frequency (DTMF) signalling and/or receiving an incoming circuit-switched call. Other signalling methods (e.g. loop disconnect signalling), if provided in the terminal and intended to be used in certain European countries, are subject to appropriate national regulations in addition to this TBR, in respect of that feature. Also, signalling for supplementary features (e.g. register recall, reception of metering pulses from the network) if provided in the terminal, and intended to be used in certain European countries, are subject to the appropriate national regulations.
For each requirement in this TBR a test is given, including measurement methods. Requirements apply at that interface of the TE which connects directly (by galvanic means) to the PSTN via a network termination point. The TE may be stimulated to perform the test by additional equipment if necessary.
This TBR specifies the connection arrangements (plug or socket, of the supplier's choice) to be provided by the TE. An adapter may be required between the terminal and the existing national network termination point in individual countries. Such an adapter is outside the scope of this TBR.
Where the origination or reception of calls by the TE is invoked, or otherwise controlled, by other equipment external to the TE, the TE still needs to be capable of fulfilling the essential requirements under Articles 4d) and 4f) at the interface to the public network. This TBR requires the manufacturer or supplier of the TE to declare the conditions met by such external devices so that their use does not cause the TE to fail to meet the essential requirements.