UNE-TBR 21 ERRATUM
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) SINGALLING.