Level 2 specification
NR/L2/TEL/30084
Specification for the Maintenance of Lineside Telephones and Tail Cables (formerly NR/WI/TEL/30084)
Issue 3, 7 June 2014
Maintenance and functional testing of lineside telephones and tail cables: signal post telephones (SPTs, CB/MD/Auto, LB/MAG and selective), level crossing phones, Plessey (Hixon) PETS phones at AHBs and other operational/emergency lineside phones, with frequency tables and service practices A to M including selective SPT overhaul, time-out tests, tail cable insulation test and limited clearance check.
Clause map — what each clause deals with
| 1 | Purpose | Testing lineside telecom phones to reduce deterioration failures and catch faults early |
| 2 | Scope | Lineside phones and tail cables; points to 30089 (Hixon units), 30080 (Whiteley PETS), 30097 (tunnel systems) and 30083 (operational buildings) |
| 3 | Definitions | Abbreviations used including AHB, CB, LB, MAG, MD, NTP, PETS, ROSE, SEL, SPT |
| 4 | Responsibilities | Agree effects with signaller or control, observe Rule Book for limited clearance phones, label faulty phones, report and record; reverse alphabetic order for combined services |
| Appendix A | Maintenance frequencies for Signal Post Telephones | SPT frequency table by type; CB/MD/Auto phones follow the host asset's interval up to a 1 year cap; ROSE signal SPTs may go six monthly |
| Appendix B | Maintenance frequencies for telephones provided at level crossings | Lists crossing types covered and frequency table; 'sleeping dog' crossings allowed longer intervals |
| Appendix C | Maintenance frequencies for telephones provided at Automatic Half Barrier crossings | Plessey (Hixon) PETS phones at AHBs: 3 monthly services plus yearly time-out test ideally aligned with signalling's annual AHB test |
| Appendix D | Maintenance frequencies for operational telephones (including those lineside phones designated as emergency telephones) | Station, platform, bridge, tunnel, access point, ground frame and emergency phones, excluding crossing, AHB and SPT phones and TOC info phones |
| Appendix E | Maintenance frequencies for the testing of Operational telephone tail cables | Selective SPT tail cables tested every 2 years |
| Appendix F Services A-B | Functional Test of Telephone (CB, LB, MAG and MD) / (Selective type) | Call in to signaller, confirm sounder and correct concentrator indication, assess speech and noise, call back; selective phones also check circuit release |
| Appendix F Service C | Maintenance of CB, MD & Auto Lineside Phones | Physical inspection of post, locks, door, cord, hook switch, labels and tail cable, then functional call test on every programmed button |
| Appendix F Services D-F | Plessey (Hixon) PETS test / Illuminated display and inductive loop / Examination and Clean | AHB phone call, off-hook and emergency override tests; instruction lighting and induction loop; post, bracket, door, locks, bell, labels and cleaning |
| Appendix F Service G | Overhaul of Telephone (SEL) | Workshop-style checks on STC twist-key and push-button selective SPTs: latch relays, contacts, cam code, lubrication, speed and system-busy lockout test |
| Appendix F Service H | Replacement of Batteries (LB & MAG) | Renewing primary cells for local battery and magneto phones |
| Appendix F Services J-K | Test of Time Out function (Enabled / Disabled) | Checks how off-hook handsets time out or raise single and multiple off-hook alarms at the signaller |
| Appendix F Service L | Test of Tail Cable (Selective SPT only) | Disconnect at NTP and SPT and insulation test the tail cable per TMTH CAB001, reporting results under 100 Mohm, then retest the SPT |
| Appendix F Service M | Limited Clearance Check | Confirm whether the phone sits in a limited clearance area and that signage matches; missing signage is a high priority fault |