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| * Onward Transmission | | * Onward Transmission |
| * Multi-berth signals | | * Multi-berth signals |
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| ==Telephones==
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| === Panel Telephones===
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| There are three automatic telephones on the panel and three concentrator telephones.
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| * Concentrator telephones
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| The concentrators are arranged in four blocks of buttons along the bottom of the panel. The A position has two blocks of buttons with a separate handset for each (Concentrators A and B) and the B position has two blocks of buttons with a single handset (Concentrator C1 and C2).
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| The concentrators contain all the buttons for the signal post telephones, box-to-box telephones, points zone telephone and user-worked crossings.
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| * Receiving a call
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| When a call is incoming a light in the button for the circuit will flash. If the handset is in the cradle then a beeper will sound in sympathy with the flashing. If the handset is not in the cradle a long single beep will sound once.
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| To answer the call first lift the handset and the depress the button of the circuit of the incoming call. The beeper will cease and the light in the button will illuminate solidly to indicate that the handset has been connected to that extension.
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| It is only possible to connect to once extension at a time.
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| * Second call arriving
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| If a second call arrives while the first is still in progress (or the handset is not in the cradle), a long single beep will sound once. The button will flash as described above as a reminder that a second call is waiting.
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| * Making a call
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| To make a call first lift the receiver and then depress the button for the extension required. A light will illuminate solidly to indicate that the handset is connected to that extension. A ringing sound will be heard until the remote extension is answered.
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| * Terminating a call
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| To terminate a call either replace the handset in the cradle or depress the extension button again. If the remote handset is replaced then the button will extinguish. If the remote handset is not replaced then the button will flash slowly until the hanset is replaced (but the beeper will not sound).
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| * Swapping calls
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| It is possible to swap between one call and another but depressing the circuit button for the current call and then answering a second. Depressing the circuit button on the second and then the circuit button on the first will re-connect to the first call.
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| The remote extension will hear silence while not connected. The circuit button for the call not currently connected will flash slowly (as the remote user has not replaced their handset).
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| * Multiple phones on single circuits.
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| In the case of remote SPTs several telephones may be on the same set of wires. These SPTs have a button inside the case for the driver to depress to be connected. The button generates a pulse signal which advises the concentrator which extension is calling in order to illuminate the correct button. During the progress of a call on one of these circuits no other circuit may ring in or be rung out. Remote users attempting to use an extension during such a time will hear silence, and a plate inside the telephone cabinet advises them that this may happen and to try again shortly.
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| ===Automatic (ETD) telephones===
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| Adjacent to each of the three concentrator telephones on the panel is an ETD telephone. These are not connected to the concentrators and have their own independent ringers.
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| A - 0779193
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| B - 0779190
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| C - 0779192
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| For an outside line 91 must be dialled in prefix to the GPO number (was it 91 in 1985?). The telephone exchange is in Swindon so the Swindon area code (01793, 0793 in 1985) can be omitted.
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| === Back desk telephones===
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| On the back desk there are:
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| - A GPO (automatic) telephone
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| - An ETD (automatic) telephone (0779189)
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| - A direct line to Swindon Control (was it Swindon in the 1980s?)
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| - A direct line to EWS Newport
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| - A direct line to Malmesbury Road Bridge (0779014)
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| - A direct line to the back desk at Bristol PSB (0775553)
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| - fax machine (0779195)
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| * Automatic Telephones
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| The automatic telephones function the same as any other ETD extension. The number keypad on the direct line telephones is not used and lifting the handset initiates a call to the destination.
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| Outside lines can be obtained on 0779189 and 0779195.
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| === Telephone directory===
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| Reading PSB
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| Swindon B IECC - [redact]
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| Uffington RR - 0779296 (66m 42c)
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| Uffington RR (outside) - 0775815 (66m 42c)
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| Uffington P-Way Cabin - 0779816
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| Uffington HCR - 0775817 (66m 39c)
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| Bourton RR - 0779138 (72m 16c)
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| South Marston Generator Room - 0779330
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| South Marston REB - 0779085
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| Highworth GF
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| Highworth RR - 0779137 (76m 24c)
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| Down Yard GF
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| Goods Yard GF
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| Down Siding GF - 0779206
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| Shunter
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| Swindon Panel Relay Room - 0779134 (77m 19c)
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| Swindon Panel Generator Room - 0779076
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| Swindon Platform 4 Helpdesk
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| Swindon Platform 1/3 Helpdesk
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| Swindon Station Manager - 0779150
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| Swindon Chargeman - 0779156
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| Swindon Booking Office - 0779188
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| Swindon P-Way office - 079109
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| Traincrew Mess Room
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| Swindon West Relay Room - 0779139 (77m 34c)
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| West End Crossing
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| Stop Board, Engine Line - 0779181
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| North Sidings GF
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| Rodbourne A GF
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| Rodbourne B GF
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| Rushey Platt GF
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| Rushey Platt HCR
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| Studley HABD Cabin - 0779135 (also extn outside) (80m 60c or 81m 40c)
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| Wootton Bassett East RR - 0779140 (83m 08c)
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| Wootton Bassett Siding GF
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| Wootton Bassett HCR / PPD - 0779209
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| Wootton Bassett P-Way Cabin - 0779036
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| Dauntsey LST - 077968 (87m 51c)
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| Chippenham Station
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| Chippenham RR - 0779943 / 0779969
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| Chippenham RR (outside) 0779927
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| Chippenham MOM - 0779930
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| Chippenham MOM Fax - 0779931
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| Thingley HCR - 0779950 (95m 32c)
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| Thingley Jcn RR - 0779948 (96m 10c)
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| Thingley (New) RR - 0779949
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| Thingley GF - 077947
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| Bristol PSB (Main Panel) - [redact]
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| Wootton Bassett West RR - 0779136 (84m 04c)
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| Wootton Bassett West Crossovers / HCR - 0779210
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| Callow Hill LST - 0779097 (85m 30c)
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| Malmesbury Road LST (linked to direct phone on back desk) - 0775558 (93m 30c)
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| Hullavington RR - 0775820 (also extn outside) (95m 25c)
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| Hullavington P-Way Cabin - 0779114
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| Bristol PSB (Stoke) - [redact]
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| Workshop GF
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| Collins Lane Equipment Room - 0779200 (shared with EJ ACE)
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| Purton Common
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| EJ Evaluator Room - 0779200 (shared with Collins Lane)
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| Minety Crossing - 0779242
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| Kemble GF - 0775813
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| Kemble Up Platform
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| Kemble Down Platform
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| Kemble Chargeman
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| Kemble Generator Room - 0775813
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| Kemble Relay Room - 0775814
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| Kemble P-Way Cabin - 0779812
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| Gloucester PSB - [redact]
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| Swindon Control - 0775414
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| Swindon Control Fax - 0775451
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| Swindon Control Engineering Desk - 0775422
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| Swindon Control Emergency - [redact]
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| Ashchurch MOM - [redact]
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| Bath RR -
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| Didcot RR - 0783123
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Brainstorm area for operating instructions notes.
Control Console
Panel Arrangement
- Main Panel
- Back Desk
- Staffing
The panel is staffed by two signalmen and a back desk person.
(From 2005 the panel was staffed by one signalman between 0001 and 0600).
Diagram
Tracks
Signals
Points
Fringe Boxes
Method of block working
Types of routes
Red arrow and yellow arrows
White route lights
Routesetting-system
- Distribution of interlocking
Remote Controls
Through Routes
Train Describer
- Display
- Stepping
- Interposing
- Cancelling
- Onward Transmission
- Multi-berth signals
Other equipment
There are two HABDs on the Swindon Panel area: Bourton (Down Main) and Wootton Bassett / Studley (Up Main).
Alarm and indication equipment separate from the panel indicates when these have been activated at the axles concerned.
A TRUST computer exists on the back desk to failitate train running enquiries.
A teleprinter, connected to the TRUST terminal, can be used for printing TRUST schedules, and also automatically prints information wires from other offices in the company.
If/when provided ?