AS EN 50069:2013 – Welded composite enclosures of castand wrought aluminium alloys for gas-filled high-voltage switchgear and controlgear
AS EN 50069:2013 – Welded composite enclosures of castand wrought aluminium alloys for gas-filled high-voltage switchgear and controlgear.
(C) one of a number of items of line terminating equipment. which can be used alternatively to terrrnate the line, e.g. for
alternative voice/data applications.
4.2.6 Metallic local loop
Metallic twisted pair communications wire in a carners network that provides connectivity between a customer’s prerses and equipment in a Telecommunications Network.
4.2.7 Off-hook See On-line.
The state of the Line Terminating Equipment when It has an electrical configuration that causes the current in the basic network loop to be at its maximum steady-state value. Can also be described as oft-hook’.
4.2.9 Public Switched Telephone Network (PSTN)
That part ol the Telecommunications Network which enables any customer to establish a connection for voice frequency communication with any other customer either automatically or with operator assistance.
Note The PSTN has a nominal transmission bandwidth of 3 kHz
4.2.10 Ring-in/Loop-out PSTN line
A both-way call set-up me connection with the PSTN. lnconng signalling to CE is by the application of a nng signal at the PSTN exchange. Outgoing signalling from CE is by the application of a DC loop at the CE
4.2.11 Standard Telephone Service
Refer to Section 6 of the Telecommunications (Consumer Protection and Service Standards) Act 1999.
42.12 Telecommunications Network
Refer to Section 374(1) of the Telecommunications Act 1997
4.2.13 Telecommunications Reference Conductor (TRC)
A low noise earthing system provsng a zero voltage reference point for telecommunications signalling and other functional purposes which may incude equipment reliablity.
4,2.14 Voice Frequency (VF)
Those frequencies in the range of 300 Hz to 3.4 kHz.