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Telecom Products

Offering you a complete choice of products which include Digital Clock With Gps Synchronized Digital Clock, Electronic LC Gate Telephone System, Way Side Telephone For Auto Dialling System, Push Button Electronic Magneto Telephone, New Electronic LC Gate Telephone System and Station Master Control Console.

Digital Clock With Gps Synchronized Digital Clock
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Specification No. RDSO/SPN/TC/62/2008 (Rev-3.0)

The digital clocks use global positioning system (GPS) to synchronize accurate time and are networked (wired and wireless) systems consisting of one master clock and several clocks for platform and office. Master clock receives time from gps receiver and sends the same periodically to synchronize all slave clocks connected to it. The synchronized time is sent through wired (RS-485) or wireless.


Salient features :
  • Digital clock is microcontroller based system.
  • The clock synchronizes the signals of the satellite to derive universal gmt time and converts the same into accurate ist.
  • All digital clocks working as slave clocks and connected to master clock will be synchronized with the time of the master clock.
  • Wired/wireless communication between master and slave clocks.
  • Real time clock backup for gps reception.
  • Automatic synchronization of real time clock, from gps receiver.
  • Intensity control of slave clocks from remote master clock unit.
  • Manual setting of real time clock, hours and minutes, 12 hr. / 24 hr. Format.
  • Test switch is provided with all clocks.
  • Front panel led indicators for communication health in master clock.
  • Front panel led indication for gps receiver’s health.
  • The clock has a portable plug and play antenna.
  • The antenna has a magnetic provision to mount it out door to clear sky.
  • User friendly, menu driven diagnostic feature in master clock unit like :
  • Add clock to network
  • Delete clock from network
  • Brightness control level indication of individual clock.
  • Getting individual clock details
  • Reset clock
  • Individual port control
  • Wireless enable / disable

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Electronic LC Gate Telephone System
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Specification No : RDSO/SPN/TC-51/2011 REV.2.0
Centrallised Power Supply, eliminates power supplies at Gates thus enables Easy Maintenance.
Privacy of conversation

Cost Effective

The Master Telephone Unit as per Rev.2 has Voice Logging Facility working on 24V/12V DC supply or 48VDC available from OFC Hut. This unit is meant for Monitoring and Recording of all events Chronologically. This unit is arm processor based with Solid State Disc and shall have its own Real Time Clock. (GPS Based Clock - Optional).

  • Time, Date, Year
  • Station ID
  • Calling / Called number in the ASM Cabin.
  • Called / Received Time and Duration.
  • Recording of events chronologically.
  • Shall have provision to store minimum 200 hours of conversation on 8GB SSD.
  • Built-in Speaker for listening recording of calls or live call monitoring.
  • Automatic recording of all events occurring in the Master Telephone.
  • Facility to replay last call by pressing one key.
  • USB Cable Socket and interfacing to PC.
  • Wave file auto copying facility.
  • Application Software Installation CD provided.
  • User interface key pad for assigning Station ID, correction of date / time etc.
  • Well engineered dust free Master Unit.
  • Current Consumption : Idle : 150 mA, During Speech : 250 mA, Ringing / Recording : 350 mA maximum

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Way Side Telephone For Auto Dialling System
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Specification no : IRS:TC-83/2007
As per the specification clause no: 3.0
The way side telephone consists of
  • Desk type telephone
  • Power supply-cum-charger
  • M.F. Battery of 12v, 7ah
  • 6 pin plug
Assembled in a wooden box and this weights over 7.5 kgms. As per the field user’s report it is too heavy to carry and they expressed that this should be of light weight.Keeping customer satisfaction on priority our r & d team developed a light weight telephone working on 3vdc with a lithium-iron battery of 3.6vdc, 900 mah with a suitable charger working on 100-300vac, 50hz. The battery can be used for 20 hours continuously on full charge. The performance of the samples are tested and found to be meeting all the parameters as per the above specification.The weight is around 900 gms. Including the charger, 6 pin plug and carrying pouch.

Weight :900 gms. (approx.)

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Push Button Electronic  Magneto Telephone
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Specification no : IRS:TC-83/2007
This push button magneto telephone is similar to the rotating type magneto telephone, but the ring generator is electronic and appears across the lines as along as the ‘press to call’ (ptc) button is pressed.
It works on 6vdc supply from 6v, 1.2 ah ni-mh battery provided inside and a charger working on 100 - 300vac, 50 hz. Provision is given in the rosette box to connect external 6vdc

Scope :

The push button magneto telephone model mti 201 is used for point to point communication for a distance of 10 kms., when the diameter of copper conductor is 1.5 mm sq.

Construction :

The telephone is desk type, housed in abs (acrylonitrile butadiene styrene) plastic moulded body (cover and base) and handset.
It has electro dynamic transducers for transmitter and receiver.
It has coiled cord and straight cord, a rosette box for connecting line and external power supply (if required).
The ring generator, ringer, induction coil and other speech circuitry are wired in a pcb of 1.6mm thick frp printed circuit board. A standard hook (cradle) switch provided disconnects the incoming ringing voltage when lifted. To call the handset has to be on the hook.
A press to call (ptc) switch is provided on the top for calling and a press to talk (ptt) switch is provided in the handset.

Technical :

Ring generator :
Frequency : 25 ± 5hz
Output : 60vac max.
Speech :
Tx : 0db across lines
Rx : -12db

Power supply :

The telephone works on 6v dc supply from a 6v, 1.2 ah ni-mh battery provided inside.
A socket is provided at the back of the telephone body to connect a charger working on 100-300vac, 50hz. A hinged metal door is provided on the top of the telephone to replace the battery as and when required. The external voltage connection provided in the rosette box can accept a maximum of 6v dc only.

Consumption :

Idle : 3ma
Conversation : 15ma
Ringing : 300ma

Installation

  • Open the rosette box and connect l1, l2 between one phone and the other.
  •  Open the cover of each battery box on top cover and slide on ‘on’ the switch provided inside the compartment.
  • The power on led shall glow. Replace the cover.
  • Press the call button and ensure that the other phone is ringing. All this time, the calling handset has to be on the hook.
  • The charger can be connected as and when the battery voltage is low. The charger has a led which goes off when the battery is fully charged

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New Electronic LC Gate Telephone System
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Specification No: RDSO/SPN/TC-51/2011 REV.2.0

.LCD & Keypad Description
The new electronic lc gate telephone system – station telephone unit consists of a user interface with one lcd and keypad. The details of these parts are shown below.
2-line, 16-character lcd
The lcd used here is an alphanumeric character display with two lines of 16 characters each.

Keypad

  • The keypad consists of 6 keys and two leds. Out of six keys, four are direction keys – up, down, left and right. The other two keys are enter and escape.
  • The left and right keys are used to select the position of cursor. These are enabled for time, date and station id setting operations.
  • The up and down keys are used to scroll through the menu items and also to edit the alphanumeric characters in time, date and station id setting operations.
  • The enter key is used to select an operation displayed on line 2 of the lcd.
  • The escape key is used to come out of the menu or discard any operation in progress.
  • One led is used to acknowledge the key press on the keypad. It blinks momentarily once a key is detected.
  • The other led is used to indicate the clock running state by toggling the led for every 1 second.

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Station Master Control Console
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The station master uses several telephones for different communications for the purpose of smooth train traffic movement in a station. Practically, it becomes tedious to attend to the telephones spread over the station master’s table.The station master control console using micro controller, designed and developed by epsilon enables easy and convenient operations by the station master / assistant station master.

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Desk Type Electronic Magneto Telephone
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Specification No : IRS:TC:79/2000 (Amendment No.2)

Electronic magneto telephone prepared by epsilon is an extended version of magneto telephone having additional feature of one push button calling in place of hand generator. It is possible to interface this telephone with microwave and optical fibre system. It can be used for point to point communication between cabin asms of a yard, cabin to level crossing gates and between two level crossing gates etc.The circuit works on 3V DC source 2 Nos. Dry battery type r - 20 to is : 8144 to be used. A battery compartment is provided on the front of the telephone, with a hinged cover and screw.

Weight :
< 1.0 kg. (Approx.)

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Electronic Level Crossing Gate Telephone
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Specification No : RDSO/SPN/TC/51/2009 (Rev.1.0)

The electronic level crossing gate telephone features include :
  • Communication and selective calling between station master and level crossing gates, with confidentiality in speech.
  •  6 gates can be connected to one asm in omnibus mode.
  • Works up to 8 km distance over 0.9mm dia cu cable.
  • Works as electronic magneto without any battery at gates, i.E. No power supply unit / battery required at gates.
  • Power and signal through the same cable pair.
  • Only one power supply system at asm office.
  • Power supply unit cum charger with outputs of 24v DC and 12v DC, having maintenance free battery of 24v, 7ah , where the 12v output is used for the master telephone and 24v output is used for the slave telephones wired through l1, l2.
Weight : 2.5 kgs. (Approx.)

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2 Wire Control Telephone
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2 Wire Control Telephone

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The 2 wire way station control telephone prepared by epsilon is to be used with 2 wire way station equipment, which is installed on the way side stations.The 2 wire way station control telephone consists of dynamic type transmitter and receiver insets. It has a led lamp to indicate that the station is called and a buzzer for hooting while the station is called. It has a pre-amplifier circuit give output voltage of 775 mv across the line with 600 ohms load impedance at the input of 5 mv across the dynamic type transmitter.

The 2 wire control telephone consists of abs body, hand micro telephone, with press to talk micro switch, cradle switch, coil cord and straight cord, 6 way rosette box, buzzer and led.The body, handset and other plastic parts are of abs plastic. It consists of 1.5 meter long coiled cord and a straight cord terminated in a rosette box. This telephone works on 12v.

Weight :
1 kg. (Approx.)

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2 Wireprimary Line Protection Box
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This protection box prepared by epsilon shall be used in series with the 2 wire line for surge protection. This consists of protective devices having the required ratings of voltage and current. It has gas discharge tubes / movr and current sensing poly switches. The circuit is assembled in a PCB and has 3 input leads and 3 output leads for L1, L2 and ground.

This is housed in a M.S. Box duly paint protected, with name place, cable entry holes, grommet etc.

Weight :
0.200 kg. (Approx.)

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Power Supply Unit For Way Side Station Equipment
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Specification No: IRS:TC:72/97 (Amendment No.1)

This smps based power supply unit can support a maximum of six numbers of way station equipment using dtmf signalling as per specification irs:tc:60/2007.The power supply unit is designed with advanced circuitry techniques with required line and load regulation and very low output ripple, as well as electrical protection against over voltage, over load, short circuit and reverse polarity of the battery connection of power supply unit (Both when power supply unit is on and off).

It is supplied with maintenance free value regulated (Sealed) lead acid batteries (12v/7ah) that conform to specification IRS:S:93/96.The power supply unit can provide either one output (1 Amp.) or six outputs (0.2 Amps. Each) for six way station equipment through 6 pairs of terminals.

Weight : 9.0 kg. (Approx.) 

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Cable Termination Box
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Cable Termination Box

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The cable termination box can be supplied for 5 - 20 pairs as per the requirement. The box is rugged, weatherproof, and highly reliable and uses universal test disconnect terminal blocks of phoenix or wago make.

Weight : 2.0 kg. (Approx.)

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Annunciator For Multiway Telephone Exchange
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Annunciator For Multiway Telephone Exchange Conforming To Rdso Drg. No. Tca:3352 (Adv)

Epsilon make annunciator is engineered with electronic circuitry is designed with scrs, ringer and ringer ICS, having audio visuals (Led and buzzer) indications. The desk type annunciator is assembled in a metal box duly powder coated. The mechanical arrangement is improved version of rdso drg. No. Tca : 3352 (Adv).
Epsilon has two models :
  • For use with magneto telephone as per irs:tc-36/97. One number of magneto telephone as per irs:tc:36/97 to be provided (*) with the annunciator, which shall be connected to the annunciator unit. This unit works on 3 to 4.5vdc
  • For use with electronic magneto telephone as per irs:tc:79/2000. One number of electronic magneto telephone as per irs-tc-79/2000 to be provided (*) with the annunciator, which shall be connected to the annunciator unit. This unit works on 12vdc.

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V.F Tapping & Termination Transformer
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He voice frequency and V.F signalling transformers prepared by epsilon are used for derivation and termination of underground telecommunication cable circuits.The side circuits of the paper insulated v.F quads, which are loaded are used for the transmission of speech of the unloaded phantom for derivation and termination of underground telecommunication cable circuits. The side circuits are used for transmission of interrupted 50 hz rising current for signaling.
The transformers are prepared in four types as follows :-
  • V.F. Transformer for loaded v.F. Side circuits, impedance ratio 1120 : 1120 ohms.
  • V.F. Terminating transformer for unloaded v.F. Side circuits (p.E. Insulated quads) impedance ratio 470 : 1120 ohms.
  • V.F. Transformer for inter wire telegraph loaded v.F. Side circuits, impedance ratio 1120 : 600 ohms.
Other impedance ratio are also available on request, such as 470 : 470, 470 : 600, 600 : 600.
Each transformer is housed in the metallic case filled with insulating compound and is hermetically sealed, to withstand extreme weather conditions. Terminals are taken out on the top of the transformer case through proper feed through terminals.
Weight : 0.800 kgs. (approx.)

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Transformer Assembly For Thermo-shrinkable Joints (2t/3t)
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Rdso Drawing No : IRS:TC-76/2000stem

The 2t / 3t transformer joints are used for termination and derivation of the circuits for pet unloaded pijf 4 quad cables.
Two transformers are assembled inside a brass tube with flying leads taken out through the marked holes in the covers. The assembly is filled up with epoxy compound and then hermetically sealed. This joint is meant to be used with thermo shrinkable sleeves.
The transformers are prepared in five types as per the impedance ratio required :
  • 470  :1120
  • 1120 :1120
  • 1120 :600
  • 470 :470
  • 470 :600
Each type has been designed to have a very good insulation between the windings and also between the windings and the case. They can easily withstand a voltage of 2kv (r.M.S) 50 hz between the windings and the case.

Weight:
0.400 kgs. (approx.)

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Emergency Portable Control Telephones (2 Wire And 4 Wire)
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Specification No : IRS:TC:75/99 (Amendment No.2)

The portable emergency control telephone prepared by epsilon is a part of the 4 wire / 2 wire emergency train traffic control system.This telephone provides inter communication between any way side point along the train route and the controller. This can be connected through 6 pin socket located along the railway track in 4 wire side and 2 wire side.

The telephone has ‘trans’ and ‘receive’ speech circuits. The telephone works on 3v dc with the aid of 2 nos. Of 1.5v dry cells. The entire circuit, hmt and the battery container are housed inside the m.S. Body provided with shoulder strap for ease of use. With the aid of a switch, this telephone can be selected for 2 wire or 4 wire operation.
It is provided with a 6 pin plug.

Weight :
< 2.5 kg. (approx.)

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Light Weight Portable Control Telephones (2 Wire & 4 Wire)
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Specification No : IRS:TC:78/2000 (Amendment No.1)

The light weight portable control telephone, which was first enclosed in abs plastic moulded box by epsilon, is a part of the 4 wire / 2 wire emergency train traffic control system.The telephone provides inter communication between any way side point along the train route and the controller with 4 wire / 2 wire pect. This telephone can be connected through 6 pin socket located along the railway track in 4 wire side or 2 wire side.The telephone has ‘trans’ and ‘receive’ dry cells. With the aid of a switch, the battery is connected to the circuit and with the aid of another switch, this telephone can be selected for 2 wire or 4 wire operation.

Weight :
< 0.5 kg. (approx.)

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Auto Dialing System Base Unit & Way Side Telephone
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Specification No : IRS:TC:83/2007(Amendment No.1)

The system is capable of connecting railway exchange and dot exchange by pressing the designated button from the way side telephone through the base unit in the test room.Way side telephone will work similar to auto telephone and becomes either subscriber of railway exchange by pressing  or dot exchange by pressing # connection is achieved automatically.

The auto dialing system consists of a base unit with cpu (central processing unit) and interface unit consisting of 4 wire / 2 wire conversion and amplification circuitry, for networking between railway telephone exchange, dot telephone exchange and railway omnibus / way side equipment in re area. The “base unit” is installed in the test room which can monitor the conversation.

This system consists of 2 parts :

  • Way side telephone with 12v/4 ah maintenance free battery with charger.
  • Base unit with handset.

Weight :
14.0 kgs. (approx.)

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Desk Type Electronic Magneto Telephone
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Specification No : IRS:TC:80/2000 (Amendment No.1)

Epsilon make selective calling equipment is used for operation on overhead cable, microwave or fibre optic link. This is electronic extended version of magneto telephone having additional features of 4 x 3 push button matrix for calling 11 station in 12 way dtmf telephone. It can also be used as an intercom between the parties. Any one can be designated as master and others as slave.

The selective calling equipment is designed with advanced digital circuitry techniques. This system will generate DTMF code for signalling the distant station as per CCITT standards. It is possible to assign a maximum of 10 station codes. Ring back tone is available to the calling station on the reception of assigned code and communication with called station is established through the handset provided. Every telephone shall be assigned a distinct calling code. It shall be possible to send the signalling code even when two or more parties are in conversation.

Weight :
< 1 kg. (Approx.)

Power supply unit (2 Amp. Or 1 amp.) shall be supplied with maintenance free battery of 12v/7ah
Battery ****** or ********.
Power supply 230v / 12v DC 0.2 amp. Regulated supply without battery.

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2 Wire & 4 Wire Control Office Equipment
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Specification No: IRS:TC:60/2007

The control office equipment prepared by epsilon is used for train traffic control with voice frequency signalling, using dual tone multiple frequency (DTMF) signals as per CCITT recommendations for 4 wire and 2 wire operations.

It is meant for use in omnibus speech circuits like section traction power and deputy controls used in railways using 4 wire transmission circuits employing 2 tones in voice frequency band for selectively calling of the station / party concerned. The controller can select any of the 99 stations. The system works on 2 wire mode by connecting a 4 wire to 2 wire conversion unit to the 4 wire control office equipment.

This equipment consists of :

  • DTMF generator (Encoder) pcb for 2 or 3 digit coding
  • Communication pcb
  • Hand set
  • Table type microphone
  • Loud speaker
  • 4 wire to 2 wire conversion unit (where necessary)
  • Works on 12v dc power supply
Weight : 10.0 kg. (Approx.)

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4 Wire To 2 Wire Speech Conversion Unit
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Active

The “Active” 4 wire to 2 wire speech conversion unit is designed to suit the 4 wire control room equipment.The design is such that the side tone is kept as minimum as possible for 2 wire impedance of 600 ohms, and does not need lead adjustment, etc. Trans and receive gain adjustments are possible with the aid of preset potentiometers. The equipment operates on 12v dc.

Passive


The “Passive” version of the 4 wire to 2 wire speech conversion unit is designed to achieve a leak better than -25db to 2 wire impedance of 600 ohms.This may be used along with the control room equipment as per irs:tc:60/2007 to convert the 4 wire control room equipment to 2 wire control room equipment.

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Dtmf Type 4 Wire Way Station Equipment
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Specification No : IRS:TC:60/2007 (Decoder)

The control way station equipment consists of a wall mounted cabinet containing signal reception, recognition, ringing and ring back transmission circuit called collectively decoder and the voice communication equipment. It is housed in a rigid box, avoiding any opening for dust etc.The front has a hinged door which, after opening gives access p.C. Board wired with decoder circuit and trans / receive amplifiers. The hand micro telephone is as per irs-tc-38/97 with an led lamp to indicate that the station is called and a buzzer for hooting while the station is called.

The front has a hinged door which, after opening gives access p.C. Board wired with decoder circuit and trans / receive amplifiers. The hand micro telephone is as per IRS-TC-38/97 with an led lamp to indicate that the station is called and a buzzer for hooting while the station is called.It is possible to assign any dtmf code - 1 to 99 and / or a, b, c, d by setting the dip switches i and ii (10 position) and iii (4 position) for a, b, c or d. The pcb is clearly marked for identification 0 to 9, a, b, c and d etc. On receipt of the selected code, it shall decode and electronic buzzer shall hoot and a red led provided on the hmt is lighted. The led shall continue to be lit till the handset is lifted from the cradle double cutting relay contacts for both trans and receive amplifiers are provided apart from the isolation transformers, to isolate the line from the equipment. Ring back tone of the required level shall appear in the trans terminals. ‘movr’ based surge protection is employed across the rx lines.

This decoder operates on 12v dc.

Weight : 2.650 kg. (Approx.)

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4 Wire Control Telephone
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4 Wire Control Telephone

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Specification No : IRS:TC:38/97 (Amendment No.1)

The 4 wire way station control telephone prepared by epsilon is to be used with 4 wire way station equipment, which is installed on the way side stations.The 4 wire way station control telephone consists of dynamic type transmitter and receiver insets (RT 200). It has an audio / visual indication at the called station.The body, handset and other plastic parts are of abs plastic. It consists of 1.5 meter long coiled cord and a straight cord terminated in a rosette box. This telephone works on 12v.

Weight :
0.590 kg. (Approx.)

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Dtmf Type 2 Wire Way Station Equipment
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Specification No : IRS:TC:60/2007 (Decoder)

The control way station equipment comprises of a wall mounted cabinet containing signal reception, recognition, ringing and ring back transmission circuit called collectively as the decoder and two wire control telephone.It is possible to assign any dtmf code to the way station equipment, 1 to 99 and / or a, b, c and d by setting the DIP switches i and ii (10 position) and iii (4 position) for group codes (a, b, c, d). This ensures a firm and rigid connection. The code selection terminals are clearly marked in the decoder pcb.On receipt of the pre-selected code, it shall decode and it shall give audio/visual indication in the 2 wire control telephone.
The equipment is housed in a metal box similar to that of the 4 wire way side station decoder.
This decoder operates on 12v DC.

Weight :
2.650 kg. (Approx.)

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Emergency Control Room Equipment
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Specification No : Conforming To IRS:TC:61/93

This equipment is also an associated unit with the test room equipment. The control room equipment (irs:tc:60/2007) can be supplied duly modified to do the functions of the emergency control room equipment.All controls are provided in the table top equipment and the loud speaker unit is kept separately.

Weight :
15.0 kg. (Approx.)

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Universal DTMF Telephone (2 Wire & 4 Wire)
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Specification No : IRS:TC:82/2005 (Amendment No.1)

This equipment is used for control communication on 4 wire / 2 wire circuits. The telephone includes circuitry of conventional control telephone as well as way station equipment decoder.The telephone is assembled in siemens type abs plastic body and is capable of work on both 4 wire and 2 wire omnibus circuits by using a changeover switch provided inside the telephone and works on :
  • Overhead 2 wire system
  • Underground cable 4 wire system
  • Ofc or digital microwave system
  • Wiring and installation is simpler
The telephone will work on 12v dc with ± 20% supply voltage.

Weight :
1.0 kg. (Approx.)

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Signal Post Telephone (Spt)  Simplex
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Re Area
The signal post telephone (SPT) consists of :
  • Master telephone in assistant station master’s cabin (Mt)
  • Slave telephone fixed on signal post (ST)
Scope :

This is similar to the above, but due to heavy induction in the cable due to 25kv ac overhead lines, it has separate power supply with the slave (24vdc) and it has specially designed filter to remove the induced voltage in the cable.

Master Telephone (MT) :


This is kept on the desk of the asm to facilitate communication between asm (MT) and the loco driver (ST) for controlling movement of train. This consists of a microphone amplifier, loud speaker and a press to talk switch. The master (Mt) and the slave (St) have separate power supplies of 24vdc each.

Provision is given on the front panel to adjust the output level by using a Potentiometer.
Operating Voltage Current24VDC
Idle< 100 mA
Speech< 250 mA
Audio Power> 500 mW

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Emergency 6 Pin Plug Socket & Box
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Specification No : IRS:TC:42/87 (Amendment Slip No.1)
Box - Conforming to RDSO DRG. NO. TCA-20060 (ADV)

Epsilon prepares six pin plug and socket used for 4 wire communication on emergency control circuits from the points provided for this purpose along the side of the track in ac electrified areas. These are made of polycarbonate plastic (unbreakable).
Socket shall be fixed in the socket box which is also prepared by epsilon. The socket shall be wired to the trans receive of the emergency control circuit, derived from the main cable through transformer joint.

The socket box is of 2 types :

  • Made of mild steel as per rdso drg. No. Tca-20060 (Adv)
  • Made of abs plastic - rugged, weather proof, unbreakable theft proof easy to install and has high insulation.

Weight :
socket box mild steel - 1 ½ kgs. (approx.) & abs plastic - 0.200 kgms (approx).

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Automatic Radio Patching Unit
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Specification No : IRS:TC:59/93

Automatic radio patching system for control / far ends using DTMF signalling for ofc system with dedicated / without dedicated channels.Control end relay kept in control office works on 12v DC and the distance end relay kept in the ofc building works on 48v DC.
This unit is optionally available for control end / far end with or without 4 way branching network.

Weight :
12.0 kg. (Approx.)

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V.F  Transformer Bay
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V.F Transformer Bay

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Rdso Drawing No : Tca - 15201 (ADV)

The V.F transformer bay prepared by epsilon is used in the communication line of railway electrification area to ensure systematic installation of v.F transformers for use in various circuits.The V.F transformer bay houses up to 54 transformers. All the types of transformers, namely v.F tapping, terminating and signalling transformers are housed in this bay as per the requirements in the circuit. Krone type connectors are provided for wiring incoming / outgoing cables.

Link panels are used for establishing isolation/connection on the lines in the section. Integrated line protection circuits are provided for each quad.The bay is constructed out of m.S. Steel sheets complete with 5 rows of link panels, aluminum sections for mounting the transformer and copper earthing strip. It is of sturdy construction and ensures compactness. The doors are made with reinforcement to avoid tilt. Grommets are provided for cable entries. Copper strip is provided for earthing.Link panels are as per iti specifications de 224008/a. Links as per iti spec. No. Bl/57279 are also supplied along with the bay. Brackets are also provided for cable harnessing.

Weight :
75 kgs. (approx.) for all quads

Dimensions and weights :
shall vary as per number of quads

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Loading Coil Assembly For Thermo Shrinkable Joint
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Conforming to : IRS:TC:29/81 (88 mh or 118 mh)

The loading coil joint prepared by epsilon consists of four numbers of loading coils of 88 mh or 118 mh assembled inside a brass tube for loading of 4 quad cables.The coils are potted with epoxy compound and lid is sealed after taking the leads for wiring. This joint is meant for use with thermo shrinkable sleeves.

Weight :
0.600 kgs. (approx.)

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Specification No : RDSO/SPN/TC/34/2002 (Ver.4)

The voice frequency communication system is used with underground PET 4/6 Quad Cable of 0.9mm dia, having characteristic impedance of 470 ohms vide Specification No. IRS:TC:30/07 for Telecommunication between Way Side Stations and Control ffice / test room.By using this system, the PET quad need not be loaded to compensate the uneven attenuation characteristics over the voice band. There shall be no need for balancing. The typical characteristics of the cable is that the attenuation (Losses) increases with frequency in the band of 300 - 3400 Hz. The equalizer amplifier designed for the System has the counter characteristics to equalize the cable losses in the V.F. Band of 300 to 3400 Hz.

The system comprises of :

Multiple way station equipment (depending on the section)

The way station equipment (WSE) consists of required numbers of krone connectors, 2 nos. Of link panel, 4 nos. Of quad amplifiers (For section, emergency, deputy and s&t control circuits), 2 nos. Of 4 wire dtmf decoder and control telephone (For section and deputy controls), and radio patching facility.
Each quad amplifier consists of a remote sensor to send the details of the status of the station to the test room.
An optical 8 way intercom can be provided in the way station equipment as required by the consignee.

Test room equipment and allied control office as well as emergency control room equipment.

The test room equipment is the same as a way station equipment except that it has no 4 wire dtmf decoder. It has a 6 way branching network with 4 wire control telephones in non-conferencing mode and a remote monitor (Table-top) to send commands to / receive response from, any station.

Weight :
40.0 kgs. (approx.)

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Epsilon Electronic Equipment & Components Private LimitedB-2, E.C.I.L Cross Roads, Near Electronic Industrial Estate, Kushaiguda, Hyderabad-500062, Telangana, India

Sunil Kohli (Managing Director)

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