Electronic LC Gate Telephone System
RDSO / Spec No.
RDSO/SPN/TC/51/2021 Rev.1
Application
Indian Railways (S&T / Telecom Sector) - Level Crossing (LC) Gate Communication
Product Specifications & Details
The Electronic LC Gate Telephone System manufactured by General Auto Electric Corporation (GAEC) provides direct, reliable voice communication between Station Master (ASM) offices and Level Crossing (LC) gates. Compliant with RDSO Specification No. RDSO/SPN/TC/51/2021 Rev.1, this system supports up to 6 Gate Telephones connected to a single Master Telephone. Equipped with integrated voice recording, GPS time synchronization, surge protection, and solar battery charging capability, it ensures secure and fail-safe communications for railway level crossings.
Key System Features
- Multi-Gate Connectivity: One Master Telephone connects up to 6 Gate Telephones (3 Gates on UP side, 3 Gates on DN side).
- Voice Recording & Playback: Features 64 kbps PCM voice recording with date, time, and station identity stamping.
- GPS Synchronization: GPS with antenna for accurate time setting and RTC clock calibration (+3.5 PPM).
- Power & Surge Backup: Dedicated power supply with 24V 7AH battery backup, solar panel connectivity, and surge protection on all units.
- Conference Calling: Supports selective conference call features for All UP and All DN gates simultaneously.
- Configurable IDs: Gate telephones are individually configurable with unique UP / DN IDs; approved by RDSO Lucknow.
Technical Specifications Table
| Category | Parameter | Specification Standard |
|---|---|---|
| Power Supply | Nominal Input & Voltage Range | 230V AC, 50 Hz, 1Ø | Voltage Range: 160V to 270V |
| Output Voltages | 12V DC – 500 mA & 24V DC – 500 mA | |
| Ripple | < 5 mV | |
| Power Backup | 24V – 7AH Battery | |
| Battery Charging Provision | Through Power Supply Unit OR Solar Panel | |
| Master Telephone | Sensitivity & Frequency Response | Sensitivity: Better than -20 dBm | Frequency Response: ± 3 dB for 300 to 3400 Hz |
| Voice Recording Standard | 64 kbps PCM Coding with Date, Time, and Station Identity Stamping | |
| Recorded Signal Distortion | < 5% | |
| Voice Storage Capacity | 200 Hours on Minimum 8 GB SSD (FIFO Basis) | |
| Local Clock | Updated with GPS OR RTC (Accuracy: + 3.5 PPM) | |
| Gate Telephone | RBT Level & Buzzer Output | RBT Level: Greater than -12 dBm | Buzzer Output: > 80dB |
| System Parameters | GPS Accuracy | 10 ms (Min) |
| Send & Receive Efficiency | Send Efficiency: < 3% | Receive Efficiency: < 3% | |
| Side Tone | < -18dBm with the oscillator level at +4dBm | |
| Insertion Loss | “On Hook” < 1dB & “Off Hook” < 1.5dB |
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