Public switched telecommunication network. Particular requirements in private switching systems
Edition 1996-06-01

Public switched telephone network. Transmission characteristics for private telephone switching systems
Edition 1996-06-01

Public switched telephone network. Technical specification for type approval of call diverters
Edition 1996-06-01

Public switched telephone network. Analogue network interface for private switching systems
Edition 1996-06-01

Public switched telephone network. Analogue network interface for telephone and telematic equipment
Edition 1996-06-01

Public switched telephone network. Recommendation upon telephone traffic flows in private communication systems
Edition 1998-08-01

Public switched telephone network. Digital attachment of a private time division switch to a public network switch
Edition 1996-06-01

Public switched telephone network. Technical specification for type approval of direct dialling in private switching systems with mf socotel signalling
Edition 1996-06-01

Terminal Equipment (TE); framework of videotex terminal protocols; English version ETS 300222:1993
Edition 1994-01

Public Schwitched Telephone Network (PSTN) - Protocol over the local loop for display and related services - Terminal Equipment requirements - Part 1: off-line data transmission
Edition 2001-09-01