scope:

This I-ETS specifies those electro-acoustical characteristics that a handset telephony terminal should fulfil to ensure the minimum speech quality when communicating across the European Public Switched Telephone Networks (PSTNs). The objective of this I-ETS is to ensure interworking between Terminal Equipment (TE) via the public network. This I-ETS applies in conjunction with the general requirements for PSTN access contained in ETS 300 001 [1]. The requirements of this I-ETS are additional to those for connection to the two-wire interface of the PSTN specified in ETS 300 001 [1].