Business TeleCommunications (BTC) - Ordinary quality voice bandwidth 2-wire analogue leased line (A2O) - Connection characteristics and network interface presentation; English version ETS 300448:1996
€84.58
Business TeleCommunications (BTC) - Special quality voice bandwidth 2-wire analogue leased line (A2S) - Connection characteristics and network interface presentation; English version ETS 30049:1996
€91.03
Business TeleCommunications (BTC) - Ordinary and Special quality voice bandwidth 2-wire analogue leased lines (A2O and A2S) - Terminal equipment interface; English version ETS 300450:1996
€77.20
Business TeleCommunications (BTC) - Ordinary quality voice bandwidth 4-wire analogue leased line (A4O) - Connection characteristics and network interface presentation; English version ETS 300451:1996
Business TeleCommunications (BTC) - Special quality voice bandwidth 4-wire analogue leased line (A4S) - Connection characteristics and network interface presentation; English version ETS 300452:1996
Business TeleCommunications (BTC) - Ordinary and Special quality voice bandwidth 4-wire analogue leased lines (A4O and A4S) - Terminal equipment interface; English version ETS 300453:1996
Private Telecommunication Network (PTN) - Specification, functional model and information flows - Call intrusion supplementary service; English version ETS 300425:1995
€173.74
Private Telecommunication Network (PTN) - Inter-exchange signalling protocol - Call intrusion supplementary service; English version ETS 300426:1995
€145.14
Private Telecommunication Network (PTN) - Inter-exchange signalling protocol - Supplementary service interactions; English version ETS 300427:1995
€116.64
High-level data link control (HDLC) procedures - ITU-T X.25 LAPB-compatible data link procedures for data terminal equipment; identical with ISO/IEC 7776:1995
€140.00
Terminal strips with insulation displacement contacts for telecommunication systems - Part 2: Requirements, test
€41.78
Private Telecommunication Network (PTN) - Specification, functional model and information flows - Call completion supplementary services; English version ETS 300365:1994
€157.10
Private Telecommunication Network (PTN) - Inter-exchange signalling protocol - Call completion supplementary services; English version ETS 300366:1994
Distribution automation using distribution line carrier systems - Part 5: Lower layer profiles; Section 1: The Spread Frequency Shift Keying (S-FSK) profile (IEC 57(Sec)199:1994)
€48.79
International Elektrotechnical Vocabulary; Chapter 722: Telephony (IEC 60050-722:1992)
€98.32
