scope:

This standards applies to the testing of the ETD short code dialling feature (17x) for communication to ECRs on those switches which supply ETD services situated in electrified (a.c & d.c) areas and shall apply to both Network Rail's operational switches and those operated by third parties (e.g Global Crossing).

The testing of the CSR emergency facilities is denoted in NR/L2/TEL/30073: Maintenance of Driver-to-Signalbox Radio Systems (CSR and SMA).

The testing of the NRN / ORN emergency facilities is denoted in NR/L2/TEL/30079 Maintenance of National Radio Network (NRN) and Overlay Radio Network (ORN).

Lineside telephony such as level crossings, signal post telephones, emergency phones etc are to tested as part of their routine maintenance as denoted in:

NR/L2/TEL/30084: Maintenance of Lineside Telephones and Tail cables

NR/L2/TEL/30097: Maintenance of Lineside Plug Points and Tunnel Emergency Communications.

Purpose

This document defines the requirements for the functional testing of the 17x short code dialling service provided on the railway voice communications system either by Network Rail's own operational switches or those provided to Network Rail under contractual agreements by third parties.