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Guide to Railway Telephones Guide on what phones are in use including new types, the new KETS system, information and accessories.

F. M. Spowart

v2.1 Sept 2016

Guide to Railway Telephones Page One of Nine

Telephone Categories:

Railway telephones come into five different categories:

1. CB: Central Battery: These are the most common and are operated by simply lifting the handset*, they are powered remotely via the line wire.

2. MAG: Magneto: These contain batteries to power the circuit, but are still operated the same as the CB type above. Sometimes referred to as ‘LB’ for local battery, these are becoming less used.

3. AD: Autodial: These have a keypad in which the user enters a number* to call the required location. These are generally connected to a remote telephone exchange.

4. MD: Monodial: These are similar to the CB or MAG, but the user lifts the handset and presses a button which dials a preset number stored in the memory.

5. PETS: Public Emergency Telephone System: These are similar to the above types, but have extra connections which fully monitor features such as handset damaged, off-hook, charger fail, ringer fail etc.

6. KETS: Kestrel Emergency Telephone System: This is an updated version of the PETS system above by GAI-tronics.

*Some phones may require a single button to be pressed.

Types (old and modern): Over the years the telephones have progressed from a few different types to an extensive range, some still used, some obsolete. The main phone manufacturers and types today are: GAI-tronics ‘Titan’ series and DAC ‘RA’ series. The now least popular ranges are: Plessey 745, Racal RA 705 series, DAC series (heavy bodied type), DAC Commander (mainly used inside control rooms) and the STC selective. Other phones of some type may still be used. The phones are either coloured ‘Goose’ Grey (SPT’s, Point Zone phones etc), or ‘Canary’ Yellow (for level crossing public use). Both sides of a crossing MUST have the same style of phone. The S.M.A.R.T. option is available on some phones, this stands for self-monitoring and reporting telephone.

To give you a perspective on what some of the weather resistant phone cost, the Racal RA 708 (grey) series costs £586.80, the Titan (yellow) phone costs £818.59. All prices include VAT! Source: www.pmctelecom.co.uk (2010) Please note that phones and catalogue numbers may be regularly updated or withdrawn.

http://www.pmctelecom.co.uk/

Guide to Railway Telephones Page Two of Nine

Standards:

Document NR/L2/TEL/30143 (June 2010) list the relevant standards for lineside telephones specification. Here are just a few important specs listed.

· Ring voltage: 30v to 100v rms. · Line voltage: 20v to 70v DC (20v to 57.5v for PETS system). · 15mA minimum loop resistance (off-hook). · Public intended use phones must have inductive coupling for hearing impaired

people. · All external line cables shall have an external diameter of 7 – 15mm. · The line cable conductor size shall be between 0.5mm – 0.9mm. · Press to call buttons shall initiate a call, but must not disconnect the handset

whilst the button is pressed. · The background noise level in which the speech will not be impaired is 70dB (an

equivalent of a large idling lorry with a diesel engine). · All label fonts should be in ‘San Serif’ and a minimum of point 10, black text on

white label. · SPT’s shall be positioned so the user can see all of the elements of the signal,

and permit the user to operate the telephone whilst standing up (approx 1.2 – 1.5m high). Special care is needed if the phone operator will foul the line; for instance limited clearance phones. See special instructions for this type.

· Unauthorised entry using standard screwdrivers or pliers should not be possible. · NO additional holes shall be drilled into the mounting plate. · MINIMUM bending radius of the tail cable is; 12 X diameter of cable used. · The following cable colour is used for all phones (although not all may be used): ·

Pair A leg B leg

1 Orange White

2 Green Black

Labelling: This should be applied to all phones. Labels which must be attached are; ‘Phonetic Alphabet’, “Lift Handset” or “Press button” instructions, the OS grid reference of the exact location, the location of which the phone will call, the point number, signal number or LC name at which the phone is at. The appropriate SPT or point zone phone (PZP) stickers shall be attached to the external side of the door. Yellow LC phones must have the black phone on yellow background label applied. The “NOT FOR 999 CALLS” sticker MUST NOT be applied to public emergency telephones, these are only used for phones such as; local control phones at level crossings, platform ‘ready to start’ telephones etc. (ALWAYS Check local documents before attaching this sticker). The ‘limited clearance’ sticker shall be applied if applicable to the location. Any other relevant sticker required for that location. (Again check local documents). LC phones MUST also have an alternative 24hr national emergency phone number including the area code for if the signalbox closes or the phone is found to be faulty/damaged and un-useable.

The twist in the pairs shall be maintained and either pair can be used if other pair is faulty

Guide to Railway Telephones Page Three of Nine

Types of modern and older phones (that may still be in use):

Cat No 87/074839

Make GAI-tronics Titan series

Type AD

Colour Yellow

Use at LC’s (but NOT for ‘PETS’)

Buttons One (with Number 1)~

Power Remote via line

Cord type Steel type

Cat No 87/037914


Type CB

Colour Grey

Use at SPT, PZP etc

Buttons None



Cat No 87/037888

Make DAC

Type CB

Colour Grey

Use at SPT, PZP etc

Buttons None



Cat No 87/037890

Make DAC

Type MAGNETO

Colour Grey

Use at SPT, PZP etc

Buttons Recall button

Power Four type D batteries (Take off front to access them)


~ Number programmed via internal keypad,

via PC program or over another phone

Standard type now

used by NR

Guide to Railway Telephones Page Four of Nine

Cat No 87/037961


Type Xing

Colour Yellow (with blue label)

Use at LC PETS only system

Buttons One – push to call



Illumination LED illuminated

Cat No 87/000660

Make DAC ‘RA 708’ series

Type CB Loop

Colour Grey

Use at SPT, PZP etc




Cat No 87/037885

Make DAC ‘RA 708’ series

Type MAGNETO

Colour Grey

Use at SPT, PZP etc


Power Three type C batteries (Remove black cap at bottom via small allen screws to access them)


Cat No 87/037926


Type CB

Colour Yellow

Use at LC’s (but NOT for ‘PETS’)

Buttons None



Phones not of the standard type used today should be escalated for upgrade at the earliest opportunity.

Designed specifically for PETS I and II

For yellow LC type, but NOT for ‘PETS’

use Cat No. 87/000659

For the new KETS system, order specific phone with Cat Number: 87/038055. This has a burgundy coloured label below the handset as opposed to blue on the PETS style phones.

Standard type now

used by NR

Standard type now used by NR, however the

‘push to call’ button has been removed

Standard type now

used by NR

Guide to Railway Telephones Page Five of Nine

Other phones and accessories:

DAC ‘RA 708’ series with BR number 1 key lock for high vandal

areas

Cat Number: 87/000650

DAC GSM-R series wireless phones

See DAC website for various types, colours and details at:

http://www.daclimited.co.uk/nr_products.html

DAC universal bracket for converting GAI-tronics Titan phones to DAC

‘RA708’ series phones


Go to the following webpage for datasheet:

http://www.daclimited.co.uk/brochures/Technical/087_000668%20co

mplete.pdf

DAC ‘RA708’ series phone without a door, for use when mounted inside a

RR, MEH or AVH.


DAC top of post bracket for ‘RA 708’ series phones available in grey or

yellow.

Cat Number: 87/000667 (grey)

Guide to Railway Telephones Page Six of Nine

Other types of obsolete phones for reference only:

Accessories: Cable Glands: The cable must be sealed correctly to stop water ingress.

Make Gland Type: Brass Gland Type: S/Steel

Titan series 54/000099 54/037050

DAC RA series 54/000099 54/037051

Allen Key sizes required to access wiring of phones:

3mm for Titan series phones.

5mm for RA 708 series phones.

Installation/user Instructions web links (for the main types used today): Titan series: http://gai-tronics.org/wp-content/uploads/2015/02/UG0100_001a4.pdf

RA 708 series: http://www.daclimited.co.uk/user%20guides/cb%20user%20guide%20complete.pdf

Plessey 745 Racal RA 705

DAC Commander STC Selective (Mechanical) (STC stands for Standard

Telephones & Cables Ltd).

Guide to Railway Telephones Page Seven of Nine

Specific functions/features present on some (but not all) phones:

Function/Feature Usually set to (if applicable) Used for

Battery Enable switch (Mag type only)

Enabled Connects/disconnects internal

battery

Mute before dialling Enabled Mutes microphone until dialling

has taken place

Call time out link See Below Set to terminate call after a

predetermined limit (if phone left off the hook)

Loop disconnect NA Impulses used to call a number (most phones now use DTMF)

Time break recall (TBR)

Switchable between three To break the call and try again without hanging up handset

Earth Loop Recall (ELR)

Switch Hook Flash

DTMF (Dual tone multi-frequency) [or ‘LD’]

NA Tones (as opposed to impulses) used to make the call (Touch-

Tone phones)

REN (Ringer Equivalent Number)

NA Number to determine how

many phones will work on one circuit

Call time-out link:

The time-out link is an automatic ‘on-hook’ facility where the phone, if left off the hook, will

time out after a chosen time.

For SPT’s and PZP’s this should be set to 7 minutes, for level crossings this MUST be set to 3

minutes, excluding PETS & KETS – see below.

At level crossings a driver is given permission to cross, they will then cross and should call

back to say they are clear. However if the crossing over takes some time and the phone had

the time-out link set to 7 minutes or OFF, the phone would be in an ‘idle standby state’ and

if the driver doesn’t replace the handset and re-establish a call to say they are now clear,

they could get impatient and simply drive away, and trains would then need to be cautioned.

PETS & KETS phones are different and OFF/disabled should be selected as these have a built-in automatic off-hook time of 10 minutes. These phones also have a button to call, so it’s highly likely a driver will use it to re-establish a call. A time-out link is moved to the required position to select the time and on/off position (if fitted). See the diagrams below.

Move the link so it is in the middle of the writing to select the setting required.

OFF

7 M

IN

3 M

IN OFF

ON 3 MIN

7 MIN

On DAC RA 708 style phones On Titan style phones

Guide to Railway Telephones Page Eight of Nine

Phone wiring and terminations:

Various phones come with 3, 4 or 5 pin plug-in connections. Connect the wiring as follows:

5 Pin phones:

Orange to PIN 1

White to PIN 5

Loop PINS 2 and 4 together or the phone will not ring.

4 Pin phones:

Orange to PIN 1

White to PIN 4

Loop PINS 2 and 4 together or the phone will not ring.

3 Pin phones:

Orange to PIN 1

White to PIN 3

No loop required.

Obsolete RACAL RA708 older style push button phone:

These should be now removed, however if you are called to a fault and the cable

requires re-terminating or renewing until a upgraded phone is fitted, connect wiring

as follows:

Connect tail cable to PINS 1 & 6

Loop PINS 7 & 8 together.

PETS MK 1 & 2 only:

Connect the wiring as follows:

1 Common

2 N/O

3 N/C

4 Earth (recall)

5 Capacitor

6 Shunt

7 Handset/Light loop

8

9 B wire

10 A wire

PETS MK 3 only:

1 A wire

2 Earth

3 B wire

Important: LC phones MUST always be connected with their own tail cable. They MUST

NOT be linked from another phone. Report any phones wired incorrectly immediately.

A leg wire

B leg wire

Push Button

Yellow wire

Black wire

Guide to Railway Telephones Page Nine of Nine

PETS and KETS:

PETS (Pubic Emergency Telephone System) was originally introduced as a more comprehensive self-monitoring phone; however some variations of phones are now obsolete. Mark 1 phones are now obsolete, and Mark 2 phones are used on crossings with four or more phones. Mark 3 is the current type of PETS phone in use today. KETS (Kestrel Emergency Telephone System) is the newest style of system and phones in use today of which it is not interchangeable with the PETS system or phones.

Basic S&T Faulting procedures:

The S&T department now cover all telephones on the lineside including the actual phone

and tail cable up to the loc or stump box at where it is terminated.

Telecoms cover the main cable into the stump box or loc.

Depending on the fault, the S&T will usually go to the phone first and check for ringing,

hearing and speech. Some faults can be rectified simply by checking the plug points inside

the phone or loose/broken cores.

It is a good idea to use a test phone on the tail cable at the phone and then the loc to see if

the phone is actually faulty.

If the phone seems OK, and the phone is a ‘MAG’ type, check the batteries in the phone, for

all other types the line voltage should be checked at the phone and loc, this should be

between 20 & 70v DC**. A lower voltage will affect the volume of the phone, so this could

be the cause of the fault. If voltage is present at the loc and not at the phone the tail cable is

faulty. If voltage in loc is out of spec or dead, the fault is passed to Telecoms to deal.

Depending on the phone and the fault, the handset part or backplate containing the circuit

parts can be changed instead of the whole phone. Spare unused parts must be returned and

labelled as a ‘working spare’.

P.E.T.S or K.E.T.S type systems will give a code to the signaller to give the state of the fault

and possible cause.

**This may depend on actual phone used, some phones have a min and max limit.

Network Rail Maintenance Specifications:

TEL/30084/A Signal Post Telephone

TEL/30084/B Level Crossing Telephones

TEL/30084/C Automatic Barrier Level Crossing Telephones

TEL/30084/D Operational Telephones

TEL/30069 Inspection and Minor Maintenance of Lineside S&T Cable Routes

This document is uncontrolled. It is NOT endorsed by Network Rail, nor is it for commissioning or testing purposes. The relevant

Network Rail documents MUST be used for this. This document is subject to possible omissions and/or errors, therefore the author

cannot be held responsible for any incidents related to railway telephones. Always follow SMTH for testing procedure.

Created & written by F. M. Spowart Network Rail S&T v2.1 Sept 2016

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