Embedded Solutions

Railways and Industrial

Critical Embedded Solutions for Railways

Ethernet/RS232 changeover switch



Railways and industrial solutions : moving you into the future

Safety - Critical Embedded Solutions for Railways

Caliber offers a comprehensive range of advanced Railways and Industrial Automation Solutions tailored to meet the critical safety requirements of the railway industry. With a strong focus on reliability, compliance, and passenger safety, our solutions enhance operational efficiency and ensure seamless integration. Experience the power of cutting-edge technology and precise control with our offerings, designed to optimize performance and elevate safety standards.

AC Controller Board for Trains

A micro smart controller system that has been specifically designed with embedded product design principles in mind to monitor and control the AC subsystem in the Indian railways' AC coaches. This system has been developed in accordance with the RDSO specifications and has been approved by RDSO before being installed in the Indian railways' AC coaches. The system comprises a control unit and a 7-inch TFT display unit. The control unit is responsible for monitoring and controlling the AC subsystem by sensing the temperature and humidity. Any faults and events that occur are stored in the non-volatile memory, and all system parameters and faults are displayed on the 7-inch TFT display. Users can modify the system configuration using the available user buttons. Additionally, faults and events can be sent via GPRS to a server for remote monitoring. Furthermore, the system has a modbus interface for an external interface.

Design Capabilities for Railways

We specialize in designing railway systems and provide product engineering services that include CBTC systems, safe and reliable hardware/software solutions, interlocking, in-vehicle solutions, and technological retrofits for legacy systems. Additionally, we offer maintenance solutions to ensure that the systems are adequately maintained and regularly tested for optimal performance.

Intelligent Input/Output Cards

Our system involves the use of intelligent input/output cards as an embedded product to process real-time high voltage signals. These cards are designed with optical isolation to ensure safety and reliability when dealing with high voltage signals. Each card has the capacity to interface with up to five high voltage signals and transport them as RS485 packets. Furthermore, the embedded product cards have undergone EMC/EMI testing and elevated temperature testing at +55 degrees centigrade to ensure their quality and durability. In the test setup, actual embedded product cards are mounted in racks with 50+ daisy-chained cards and 250+ signals multiplexed. The multiplexed signals are then carried over RS485 to a gateway. The overall purpose of this system is to monitor the trackside device Axle Counter health.

Intelligent Data Logger System

A highly effective solution designed for preventive maintenance of trackside devices. It constantly monitors the health of axle counters in trackside devices by using data logger hardware, which is connected to each device and networked via RS485 or Ethernet to form a private network. The data loggers periodically collect and locally store seven days of health data, which can be easily retrieved through a USB interface. Additionally, a gateway is installed to periodically collect the data from each data logger and upload it to the cloud for further analysis and processing. This comprehensive system provides a reliable way to monitor and maintain trackside devices and prevent potential malfunctions.

Wireless Train Control Simulator

A handheld device designed to emulate train control signals, intended for maintenance purposes when trains are not available. The device operates on a binary FSK communication system and utilizes an HDLC protocol layered on top of physical RF channels. It includes an antenna for low-frequency RF transmission and is powered by a battery. The device is equipped with several ICs, including the Atmega328P-AU, SPI, UART, HDLC, EEPROM, RF transmitter, and RF demodulator, to enable efficient and reliable communication.

Conversion to IP Network

In order to modernize the existing network, the decision has been made to migrate from a legacy system to an IP network. This entails replacing the current proprietary railways protocol with an IP protocol. The new network will feature geographically distributed nodes, each of which will be powered by intel processors. Additionally, the nodes will come equipped with a data and error logging mechanism, enabling quick and easy troubleshooting. The network will also support remote monitoring and configuration of the nodes, streamlining the management of the entire network. Overall, this upgrade promises to deliver a more reliable and efficient network infrastructure.

AC Coach Controller

A high-performance system designed specifically for double decker AC coaches. It boasts 22 110V digital inputs and 20 relay outputs, providing control for up to 4 compressors, 4 condensers, 4 blowers, and 2 heaters. Additionally, the system features 6 temperature sensors to accurately measure source air, return air, and fresh air, as well as humidity and pressure sensors. The Modbus interface allows for easy integration with other systems, while the internal EEPROM logs all faults and events. The GPS/GPRS interface enables remote monitoring, while the 7-inch TFT display provides a clear and user-friendly interface. Overall, this AC Coach Controller offers an exceptional level of control and precision for a comfortable and efficient journey.

Ethernet/RS232 Changeover Switch


The Ethernet/RS232 changeover switch is specifically crafted to cater to the needs of railway signaling networks. Its rack mountable design allows it to easily interface with existing systems, and its railway-grade components make it a reliable drop-in replacement. This switch also serves as a versatile solution for changeover switching functions. Its smart microcontroller continuously monitors and controls the switching process, while its embedded firmware detects and alerts to any fault conditions. Additionally, an emergency switch is monitored for manual changeover, further enhancing the switch's dependability.

Ethernet/RS232 Changeover Switch-Highlights

Microcontroller based switching

Railway - grade components

3 Ethernet ports

14 RS232 ports

Emergency changeover switch

Ethernet To Fiber Converter Switch


Ethernet-Fiber converters facilitate the linking of ethernet equipment based on un-shielded twisted pair (UTP) copper wiring to a fiber optic connection, thereby allowing the utilization of fiber's advantages.


Extending links over greater distances using fiber optic cable

Protecting data from hacking, noise and interference upgrade your network with additional bandwidth capacity

Provides you with the flexibility to add fiber on a port-by-port basis

Fast ethernet or gigabit ethernet to multi-mode or single mode

Ethernet to fiber and fiber back to ethernet links

Fiber to fiber links

About The Product

A copper transceiver employed in an ethernet-fiber converter facilitates the conversion of UTP/RJ45 ethernet signals into those compatible with fiber optic transceivers. Media converters are versatile in their ability to connect to a range of optical fiber cables, including multimode, single mode, and single strand fibers.

As a standalone device with its own power adapter, the ethernet-fiber converter is capable of transforming fixed speed fast ethernet rates by converting 10/100 UTP links to fiber connections.


Copper-based ethernet connections using unshielded twisted pair (UTP) cable have a limited data transmission distance of up to 100 meters. However, this range can be significantly extended by using an ethernet to fiber conversion solution, allowing for fiber optic cabling to transmit data over several kilometers.

The benefits of an ethernet to fiber converter are particularly evident in environments with high levels of electromagnetic interference, such as industrial settings, railway stations, power stations, and remote installations. Copper-based ethernet links are susceptible to temporary or permanent data corruption due to EMI interference. In contrast, fiber optic cables are impervious to these types of interferences, making them a reliable option for transmitting data.

Targeted Market Segments

Wind mills – linking various installations that are kilometers apart

Industrial automation – connecting machines/equipment in a heavy emi/noise/vibration/pollution/hazardous environment

Larger offices – connecting servers and client systems that are spread over a larger area where running UTP cables is not feasible/viable/unsafe

Secure data transmission is of prime concern – this product will offer some degree of protection in the Layer - 1 level

Mobile communication/telecommunication/network service providers

Traffic control


Operating voltage operating : 24VDC / 250mA with 10 – 30V Range

Temperature storage : -40ºC to 70ºC

Temperature operating : -40ºC to 85ºC

Humidity mechanical details : 10% to 95% (Non-Condensing)

Total weight : Sheet metal enclosure (10 x 5 x 8)

Number of UTP Ports : 0.4 Kg

UTP Connector : 2 (10BASE-T / 100BASE-TX)

Number of Optic Fiber Ports : RJ-45 TX Ports : 1 or 2 (100Base-FX)

Fiber Optic Connector : ST or SC duplex receptacle

Ethernet Standard : IEEE802.3u

ATM standard : UNI version 3.0 Section 2.3 (100 Mbps)

Optical performance standard : FDDI PMD (ISO/IEC 9314 - 3:1990 and ANSI X3.166 - 1990)

Optic fiber type : Multi-mode 50-62.5/125μm (or) Single-mode 7-10/125μm

10 BASE-T Link

Mode: OFC - UTP, UTP - UTP

Range: 100 Meters

Speed: 10 Mbps Full - duplex

UTP Cable type: 4-wire CAT-3 or better

100 BASE-TX Link

Mode: OFC - UTP, UTP - UTP

Range: 100 Meters

Speed: 100 Mbps Full - duplex

UTP Cable type: 4-wire CAT-5 or better

100 BASE-FX Link

Mode: OFC - UTP, OFC - OFC

Range: 2km (1320 nm) - 80km (1550 nm)

Speed: 100 Mbps Full- duplex

Regulatory Approvals

CE: EN61000-6-2,4, EN55011, EN61000-4 - 2,3,4,5,6

ROHS: Compliant