NR/L3/SIG/11231 Signal Maintenance Testing Handbook
NR/SMTH/Part 06
Index
Issue No. 01
Issue Date: 05/03/11
Compliance Date: 03/09/11
The issue status of each SMT is detailed in the NR/L3/SIG/11231 section and in
the header of the individual SMT.
This section contains telecom maintenance test plans that might be undertaken by Signal
Technicians
Subject
Telecoms Maintenance Testing and Fault Investigation
Telecom Maintenance Test Plan: Replace or Repair a
Telecoms Tail Cable
Telecom Maintenance Test Plan: Replace a Telephone
Telecom Maintenance Test Plan: Replace a Selective
Telephone
Telecom Maintenance Test Plan: Replace a Telephone
Handset/Cord
Telecom Maintenance Test Plan: Missing Telephone,
Telephone Handset or Handset Cord
Telecom Maintenance Test Plan: Missing Loud Sounding
or Extension Bell
Telecom Maintenance Test Plan: Missing Telecoms Tail
Cable
Telecoms Failure Investigation Test Guide: Telephones
Number
Part 06
Issue
01
Part 06/CAB001
01
Part 06/TEL001
01
Part 06/TEL002
01
Part 06/TEL008
01
Part M06/MISS001
01
Part M06/MISS002
01
Part M06/MISS003
01
Part 06/TELTFI001
01
End
Page 1 of 1
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NR/L3/SIG/11231 Signal Maintenance Testing Handbook
NR/SMTH/Part 06
Telecoms Maintenance Testing and Fault Investigation
Issue No. 01
Issue Date: 05/03/11
Compliance Date: 03/09/11
General
Just as Signalling has its Maintenance Testing Handbook (NR/SMTH), so
Telecommunications Engineering uses an equivalent document:
NR/L2/TEL/31001, Operational Telecommunications – Maintenance Testing and
Failure Investigation Process (TMT&FIP)
for reinstating previously working Telecommunications equipment to service and for
thorough investigation of safety related failures.
Signalling Technicians in many parts of Network Rail do carry out first line
maintenance on certain items of Telecommunications equipment on behalf of their
Telecommunications Engineering colleagues. Where this happens, restoration work
and safety failure investigation shall be undertaken to the Telecommunications
Maintenance Testing Handbook (NR/TMTH). However, the equipment covered by the
Telecommunications Handbook is considerably broader in scope than the few items
Signalling Technicians are authorised to maintain. Accordingly, an extract of
NR/TMTH is included in this section. Contents are in Part 06/Index.
The Test Plans and Failure Investigation Test Guide cover the only
Telecommunications equipment that Signalling Technicians are allowed to maintain,
unless the Technicians are also qualified in the full Telecommunications Maintenance
Testing and Failure Investigation Handbook
Telecom Failure Investigation
Note that SMTH documentation is used to record the outcome of testing /
investigations undertaken by Signalling Technicians using the above Test Plans.
Guidance on when to use the telecom failure investigation guide Part 06/TELTFI001
is given in the guide itself.
If in doubt that the failure falls within the criteria listed above, it shall be escalated
through the normal procedures.
NR/L2/TEL/31001 (NR/TMTH) is the primary standard for telecoms
maintenance testing and supersedes the extracts contained in this section
(Part 06) of NR/SMTH.
End
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Page 1 of 1
NR/L3/SIG/11231 Signal Maintenance Testing Handbook
NR/SMTH/Part 06/CAB001
Telecom Maintenance Test Plan: Replace or Repair a Telecoms Tail Cable
Issue No. 01
Issue Date: 05/03/11
Compliance Date: 03/09/11
Telecoms tail cables having a maximum of 4 conductors and of a telecoms
type construction.
Excludes: Any other type of tail cable.
Includes:
*** INDEPENDENCE EXEMPT ***
Before Installation Work
1. Check identity of existing cable by physically tracing or alternative methods.
2. Check for intermediate breakout points or terminations.
3. Check cable terminations are Not Damaged and Correctly Labelled.
4. Check that the replacement cable is Not Damaged and is Correct Type.
5. Check that tail cable to be worked on is fully Isolated.
6. Where cables are to be jointed, Check that all joint enclosure component parts
are available and appropriate to the work.
7. Check that the cable is Not Damaged, is Correctly Installed and protected to the
appropriate standards.
8. Check all physical connections. Check that all cable connections are firm, robust
and mechanically sound.
9. CONTINUITY TEST all cable conductors.
10. INSULATION TEST all cable conductors.
11. Check the cable has been adequately secured.
12. Check that the replacement tail cable has been Correctly Labelled.
13. Check any line fuses or links are replaced and any lightning protection is
restored.
14. The Maintenance Test Plan/s for the equipment fed by the cable/s should be
checked and any requirement marked with an asterisk “ “carried out.
End
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After Installation Work
NR/L3/SIG/11231 Signal Maintenance Testing Handbook
NR/SMTH/Part 06/TEL001
Telecom Maintenance Test Plan: Replace a Telephone
Issue No. 01
Issue Date: 05/03/11
Compliance Date: 03/09/11
Direct line telephones used for box to box, signal post, point testing and level
crossing applications..
STC selective and former Western Region sequence switch units, Any other
Excludes:
type of telephone application
Includes:
*** INDEPENDENCE EXEMPT ***
Before Installation Work
1.
Check that the replacement part is Correct Type (compatible with the telephone
system) and is Not Damaged.
2.
Check the mountings, brackets and fixings are in good operational condition.
3.
Check the condition of all equipment, wiring and connectors.
4.
Check the condition of any weatherproofing/protection used.
5.
Check any telephone specific configuration settings are correct for application.
After Installation Work
6.
Check that any replacement component is Correctly Installed (securely fixed/safely
mounted and electrically connected).
7.
Check the telephone handset cord is Correctly Installed (properly secured and not in
a position to be fouled).
8.
Check any tail cable is Correctly Installed (properly secured and that all insulation is
sound and the line jack connection box is properly secured.
9.
Check all physical connections are correct and mechanically sound.
10. Check correct operation of call set–up in accordance with calling instructions
pertinent to the telephone.
11. Check correct operation of engaged tone by calling a telephone that is already in use
if appropriate to the system.
12. Check correct operation of sounder/bell by receiving a test call.
14. Check that there is no noise or unwanted interference or excessive sidetone.
15. Check functionality for all telephones associated with the same service. This is
essential at level crossings and point zones where multiple telephones are used.
16. Check that the telephone is Correctly Labelled.
Additionally for ETD Telephones
17. Check 999 call operation by making a test call.
End
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13. Check speech quality to ensure that speech level is acceptable.
NR/L3/SIG/11231 Signal Maintenance Testing Handbook
NR/SMTH/Part 06/TEL002
Telecom Maintenance Test Plan: Replace a Selective Telephone
Issue No. 01
Issue Date: 05/03/11
Compliance Date: 03/09/11
*** INDEPENDENCE EXEMPT ***
STC selective and former Western Region sequence switch units..
Direct line telephones used for box to box, signal post, point testing and level
Excludes:
crossing applications, Any other type of telephone application
Includes:
Before Installation Work
1.
Check that the replacement part is Correct Type (compatible with the telephone
system) and is Not Damaged.
2.
Check mountings, brackets and fixings are in good operational condition and safe to
use.
3.
Check the condition of all equipment, wiring, connectors and telephone labelling,
where appropriate.
4.
Check the condition of any weatherproofing/protection used.
5.
Check, Record, and, where practical, verify the existing configuration of cam settings
and switch setting of the existing unit.
After Installation Work
6.
Check that any replacement component is Correctly Installed (securely fixed/safely
mounted and electrically connected).
7.
Check that the code for the telephone is correctly set and secure.
8.
Check the telephone handset cord is Correctly Installed (properly secured and not in
a position to be fouled).
9.
Check any tail cable is Correctly Installed (properly secured).
10. Check all physical connections. Check that plug and cable connectors are firm,
correctly connected and mechanically sound.
11. Check correct operation of call setup in accordance with calling instructions pertinent
to the telephone.
12. Check replacement unit is Correctly Labelled.
13. Check speech quality to ensure that speech level is acceptable.
14. Check that there is noise and unwanted interference.
15. Check with signaller that identity of calling SPT received at the signal box is correct.
End
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NR/L3/SIG/11231 Signal Maintenance Testing Handbook
NR/SMTH/Part 06/TEL008
Telecom Maintenance Test Plan: Replace a Telephone Handset/Cord
Issue No. 01
Issue Date: 05/03/11
Compliance Date: 03/09/11
Includes: Telephone handsets and telephone handset cord
*** INDEPENDENCE EXEMPT ***
1.
Check that the replacement handset/cord is Not Damaged.
2.
Check that if the replacement handset is Correct Type (if physically different to the
existing handset, it is compatible with the handset cradle).
3.
Check existing handset is Correctly Labelled (if appropriate).
4.
Check condition of cord connectors, plugs and socket.
After Installation Work
5.
Check handset/cord is Correctly Installed.
6.
Check all connections are secure and mechanically sound.
7.
Functionally Test the handset for speech by making test calls.
8.
Test functionality of the Press to Talk facility.
9.
Check that the replacement handset has been Correctly Labelled (if appropriate).
End
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Before Installation Work
NR/L3/SIG/11231 Signal Maintenance Testing Handbook
NR/SMTH/Part M06/MISS001
Telecom Maintenance Test Plan: Missing Telephone, Telephone Handset or
Handset Cord
Issue No. 01
Issue Date: 05/03/11
Compliance Date: 03/09/11
Direct line telephones used for box to box, signal post, point testing and level
crossing applications..
Excludes: Sequence switch telephones, selective telephones, Auto diallers
Includes:
*** INDEPENDENCE EXEMPT ***
BEFORE REPLACEMENT
1.
Check for evidence on site and by reference to diagrams or records that the
telephone previously existed. If no evidence is present consult with the Signal &
telecom maintenance Engineer.
2.
Check that the replacement part is Correct Type (compatible with the telephone
system) and is Not Damaged.
3.
Check the mountings, brackets and fixings are in good operational condition.
4.
Check the condition of all equipment, wiring and connections.
5.
Check the condition of any weatherproofing/protection used.
6.
Check that any existing labelling is correct.
7.
Check that if a handset is being replaced it is Correct Type (physically compatible
with the handset cradle).
AFTER REPLACEMENT
8.
Check that any replacement component is Correctly Installed (securely fixed/safely
mounted and electrically connected).
9.
Check the handset cord is Correctly Installed (properly secured and not in a position
to be fouled, where required).
10. Check any tail cable is properly Correctly Installed (secured and that all insulation is
sound and the line jack connection box is properly secured).
11. Check all physical connections are correct and mechanically sound.
12. Check dial tone is present if appropriate to the system.
13. Check correct operation of call set-up in accordance with calling instructions pertinent
to the telephone.
14. Check correct operation of sounder/bell by receiving a test call.
15. Check speech quality to ensure that speech level is acceptable.
16. Check that there is no noise or unwanted interference.
17. Check functionality for all telephones associated with the same service. This is
essential at level crossings and point zones where multiple telephones are used.
18. Check that the telephone is Correctly Labelled.
19. Check press to talk functionality of handset if provided.
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Page 1 of 2
NR/L3/SIG/11231 Signal Maintenance Testing Handbook
NR/SMTH/Part M06/MISS001
Telecom Maintenance Test Plan: Missing Telephone, Telephone Handset or
Handset Cord
Issue No. 01
Issue Date: 05/03/11
Compliance Date: 03/09/11
Additionally for ETD telephones
20. Check 999 call operation by making a test call.
End
Page 2 of 2
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NR/L3/SIG/11231 Signal Maintenance Testing Handbook
NR/SMTH/Part M06/MISS002
Telecom Maintenance Test Plan: Missing Loud Sounding or Extension Bell
Issue No. 01
Issue Date: 05/03/11
Compliance Date: 03/09/11
Includes: Loud sounding or extension bell associated with a telephone
*** INDEPENDENCE EXEMPT ***
1.
Check for evidence on site and by reference to diagrams or records that a loud
sounding or extension bell previously existed. If no evidence is present consult with
the Signal & Telecom Maintenance Engineer.
2.
Check that the replacement part is Not Damaged and is Correct Type (compatible
with that previously used).
3.
Check the mountings, brackets and fixings are in good operational condition.
4.
Check the condition of all equipment, wiring and connections.
5.
Check the condition of any weatherproofing/protection used.
6.
Check that any existing labelling is correct.
AFTER REPLACEMENT
7.
Check the replacement component is Correctly Installed (securely fixed/safely
mounted and electrically connected).
8.
Check the connecting cable is Correctly Installed (properly secured and that all
insulation is sound).
9.
Check all physical connections are correct and mechanically sound.
10. Check correct operation of call set-up in accordance with calling instructions pertinent
to the telephone.
11. Check associated telephones and the loud sounding or extension bell are functioning
by making and receiving a test call.
12. Check functionality for all telephones associated with the same service. This is
essential at level crossings and point zones where multiple telephones are used. This
shall include the use of auto-diallers.
End
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BEFORE REPLACEMENT
NR/L3/SIG/11231 Signal Maintenance Testing Handbook
NR/SMTH/Part M06/MISS003
Telecom Maintenance Test Plan: Missing Telecoms Tail Cable
Issue No. 01
Issue Date: 05/03/11
Compliance Date: 03/09/11
Telecoms tail cables having a maximum of 4 conductors and of a telecoms
type construction.
Excludes: Any other type of tail cable.
Includes:
*** INDEPENDENCE EXEMPT ***
BEFORE REPLACEMENT
1.
Check site to establish that the tail cable was previously fitted.
2.
Check from records or other means the existing allocation of circuits.
3.
Check that the replacement cable is Not Damaged and is Correct Type.
4.
Check cable terminations and labelling are correct.
5.
Check that circuit to be worked on is fully Isolated.
AFTER REPLACEMENT
6.
Check that the cable is Not Damaged, is Correctly Installed and protected to the
appropriate standards.
7.
Check all physical connections. Check that all cable connections are firm, robust and
mechanically sound.
8.
CONTINUITY TEST all cable conductors.
9.
INSULATION TEST. all cable conductors
10. Check the cable has been adequately secured.
11. Check that the replacement tail cable has been Correctly Labelled.
13. Refer to the relevant Maintenance Test Plans for the operational equipment/systems
affected by the tail cable replacement work and carry out steps marked with an
asterisk “ “.
End
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12. Check any line fuses or links are replaced and any lightning protection is restored.
NR/L3/SIG/11231 Signal Maintenance Testing Handbook
NR/SMTH/Part 06/TELTFI001
Telecoms Failure Investigation Test Guide: Telephones
Issue No. 01
Issue Date: 05/03/11
Compliance Date: 03/09/11
Includes:
Noisy speech, Bell / Sounder not working, Unable to make outgoing calls,
Unable to hear properly, Crosstalk or overhearing.
*** ESCALATION EXEMPT ***
Where the failure applies to telephones provided for level crossings, signal
posts or other emergency / safety applications this may constitute a high
risk SRTF because the designs of telephone instruments generally do not
permit a fail safe condition when faults occur.
Non Destructive Tests
N01
Check for damaged or missing equipment.
N02
Check security of associated equipment, cables, location cupboards and relay
rooms.
Destructive Tests
D01
Check if the telephone operates correctly.
D02
On Selective SPT systems, Check that the coding is correct and that the encoding
device is secure.
D03
CONTINUITY TEST cables, links and jumpers.
D04
Check the tail cable or local wiring for damage.
D05
Check for any missing, links or jumpers.
D06
Replace the telephone or associated equipment if it does not work correctly.
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D07
Check the telephone label is in place, compliant and legible.
Other Considerations
01
Care shall be exercised when using manufacturer’s handbooks to avoid
inadvertently carrying out destructive testing before non-destructive testing is
completed.
End
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