Level 2 specification
NR/L2/TEL/30083
Specification for the Maintenance of Telephone Instruments in Operational Buildings (formerly NR/WI/TEL/30083)
Issue 2, 7 March 2009
Maintenance and functional testing of discrete operational telephones on the operating floors of manned buildings (signal boxes, signalling centres, control offices, gate boxes, crossing keeper huts): CB, LB and magneto phones, battery replacement, auto phones, GSM-R Dicora fixed terminals and NRN Ascom/Sitronics fixed terminals, all yearly by default.
Clause map — what each clause deals with
| 1 | Purpose | Maintenance and functional testing of operational-building telephones to cut deterioration failures |
| 2 | Scope | Discrete safety-critical phones on operating floors of manned buildings; excludes unmanned buildings, lineside phones, PETS and concentrator handsets |
| 3 | Definitions | Abbreviations used: Auto, CB, FTS, GSM-R, LB, MAG, NRN, NTBA, PETS |
| 4 | Responsibilities | Agree effects with the user first, report defects and record actions; where several services fall together do them in reverse alphabetical order |
| Appendix A | Maintenance frequencies for Telephones | Frequency table by phone type (CB, LB/MAG, Auto, Dicora, NRN fixed), default yearly, and the services below |
| Appendix A Service A | Functional Test of Telephone (CB, LB and MAG) | Condition of case, cord, handset, bracket, socket and label; for staffed far ends a test call checking indication, speech quality, call back and sounder |
| Appendix A Service B | Replacement of Batteries (LB & MAG) | Locate and renew primary cells older than 12 months, clean housing and check connecting leads |
| Appendix A Service C | Functional Test of Telephone (Auto) | Physical checks plus test call to another landline (not mobile or radio), speech quality and call back |
| Appendix A Service D | Maintenance of a GSM-R FTS Dicora terminal | Check Dicora audio and touchscreen modules, mounting, labels, speech and presentation with user, cabling, NTBA and 24V supply; power plant under NR/L2/TEL/30081 |
| Appendix A Service E | Maintenance of a NRN fixed terminal (Ascom / Sitronix phone) | Condition and labels, test call to a train with signaller permission using radio protocol, incoming call via ETD number, Sitronics power unit check |