Contact Us

IC-6, SJCE-STEP, JSS Technical Institutions,
Mysore-570006, Karnataka, India
Contact Number: +91-821-2414198
Fax: +91-821-2414178


We are Airbus Certified TETRA Wireless Solution Partner (TWISP).

Tetra Smart Modem System(TSMS)


Tetra Smart Modem System(TSMS) is built using SCADA Messaging framework and designed to support SCADA Applications, Fire Alarm Monitoring, Burglar Alarms, remote control and, in general, any application that requires the management of distributed devices and protocols interconnected across geographical areas through TETRA networks.

  • TSMS platform has at the heart the AIRBUS TDM880i TETRA modem 
  • The TSMS is composed of: 
  • One (1) or more TETRA SMART MODEM composed of the AIRBUS TDM880i Modem, coupled with a Hardened Linux based single board computer, where SCADA protocol translation, O&M and seamless migration from Analog Radio functionalities are implemented, coupled with an enclosure designed to meet extreme environment requirements.
  • One (1) or more TETRA SMART MODEM server (TSM-SV), based on a Hardened Linux Operating System, performs all the SCADA protocol translation, O&M and provisioning, seamless migration from Analog Radio, TETRA Network interconnection, SCADA Application Server interfacing functionalities.
  • One (1) or more TSMS Diagnostic and Supervision Server (TSM-DSSV), based on a Hardened Linux Operating System, implements all the system monitoring, software upgrade through TETRA radio interface functionalities, as well as, presents an SNMP interface to higher level Network Management System.
  • The TSMS implements the following protocols: MODBUS (Serial and IP), DNP3, ROC, SINAUT, IEC 60870. Additionally, since the TSMS is designed around an extendable and open software framework, any additional protocol or vendor specific implementation can be implemented

TSMS Servers & Modems

TSMS has multi server and multi modem support. Each modem is then connected to many RTUs. Each TSMS server manages a pool of TSMS modems. The server monitors the modem operational status and receives fault and performance alarms from the modems. Diagnostic tools are available from the server to trouble shoot the modems, download software, and apply corrective actions.

TSMS supported physical ports

TSMS modem supports the following ports.

1. RS-232 Serial (3)

2. RS-485 (1)

3. Ethernet (2)

4. USB (4)

5. VGA (1)

6. Digital IO lines (8)

Training & Support

We offer hands on training & materials on TSMS framework customization. Which includes,

1. Framework basics

2. Detail Architecture & Design

3. Components of Framework

4. Custom Security implementation

5. Standard/Proprietary protocol implementation


  • Multi User
  • Multi Server
  • Language localization support
  • Remote software upgrade
  • Remote monitoring
  • Remote Diagnostics
  • Dynamic Configuration
  • Easy Alarm management
  • H24/D365 mode of operation
  • Seamless Industry protocol support
  • Custom Alarm configuration
  • Copy or Clone the Device(Server/Modem) Configuration
  • Easy Alarm management
  • Modem processing ability can handle up to 100 Modbus Messages / Second. Server can handle 250 Modbus Messages per Second. Transmission of Modbus messages is linked to radio access bandwidth (TETRA, TEDS, 3G, WiFi, LTE,..).
  • Casing designed to sustain extended temperature range and can be further tailored and adapted to.
  • Software DSSV Designed to allow quick provisioning of Modems.
  • Each modem is continuously monitored by the TSM-DSSV through an over the air heart beating.
  • Modem and Servers can handle multiple number of applications and protocols.
  • Modem can act also as an RTU and interface metering and actuator devices through the available ports.
  • Implements IP Network Address Translation (NAT) by integrating in the SW framework Netfilter functionalities (
  • Use standard DB to store the most of the logs, easy access to protocol information


  • Easy maintenance
  • Easy Upgrade in less time
  • Less man power
  • Easy monitoring

Soft Migration

TSMS has been designed from the ground up to allow a controlled, risk free, soft migration from Analogue Radio Technology to Digital TETRA.

  • The soft migration procedure can be applied to each SCADA Sites Domain location and can be achieved by steps as little as one (1) site at time or as many as the entire SCADA Sites Domain in a single step. The important point is that the procedure is supported by specific TSM features that allows the existing analog system to coexist at the same time with TETRA System, at the same site, hence allowing easy and immediate transitions or rollback, in case of migration problems. Depending on the frequency of the SCADA transactions on the RTU, the TSM migration feature is designed such that even a single message is not lost.
  • To achieve the soft migration, the TSM-SV is deployed and connected in transparent mode to the SCADA Server and the Analog Radio System. When in transparent mode, the TSM-SV allows SCADA messages flow between SCADA Server and Analog Radio. At the same time, while in transparent mode, the TSM-SV can provision and manage the deployed TSMs, still without interfering with the existing set up.
  • TSM(s) are deployed at site, commissioned and integrated into the TSM-SV through the TETRA radio interface and connected in transparent mode between RTU and analog radio. The maximum service interruption, if any (depending on SCADA transaction frequency), will be less than 5 minutes. The Service interruption at the RTU site can be reduced to zero if the TSM connection is done between two (2) SCADA transactions (typically between two polling pass more than 5 minutes). When in transparent mode, TSM allows SCADA messages flow unaltered between SCADA Server and Analog Radio, at the same time TSM uses the TETRA Network for the configuration, heat beating and to receive commands from TSM-SV.
  • After deciding on the migration sequence, on a per RTU site, hence on a per TSM base, through the TSM-DSSV, the TSM-SV will notify the TSM to switch the SCADA messaging from Analog transparent to TETRA mode. The switching will happen without service interruption and message loss. Should any issue arise during RTU site migration, it will be possible to instruct the TSM to switch back to transparent mode, hence back to Analog Radio, mitigating any migration risk. This procedure is applicable on a per site base basis and reduces dramatically the overall migration risks as well as allows to monitor the TETRA traffic performance and prompt intervention should some anomaly arise.
  • After migrating all the TSM(s) of the selected SCADA Sites Domain and upon completion of a stability period, where both TETRA and existing Analog Radios will coexist (even if TETRA will be the used one), after a period monitoring of the TETRA network traffic, it will be then possible to dismantle the analog radios and operate in the TETRA communication mode.
  • The picture that follows depicts the above concept in the three (3) configurations (C1, C2 and C3).

Manage Device

TSMS Diagnostic and Supervision Server has a feature to configure and manage TSMS servers and modems. This screen provides device management functionalities. User can add/modify/delete servers or modems.

Dash Board

TSMS Diagnostic and Supervision Server contains dashboard which shows alarm Summary. The Statistical information of alarm messages like Critical alarms, Major alarms, Minor alarms, and Total number of alarms raised are shown. It includes Server level aggregated information and detail modem level information (when expanded). The second view in the dashboard displays modem health status, whether modem is responding to heartbeat (sent by the server)? The last heartbeat response received from the modem. The another important view in the dashboard is Device summary. It shows statistical information of messages exchanging between server and modem(s).

Device Copying

Using TSMS Diagnostic and Supervision Server, it is easy to clone a device. All the configuration and functionality would be copied as it is except modem identification and other information unique to the modem. It is also possible to copy only few configuration and functionality to other existing modem or new modem.


The server or modem memory and cpu usage can be plotted on the graph to analyse the performance of the modem from time to time. It is also possible to plot the message traffic of a particular modem or server.

Software Upgrade

It is one of the important TSMS features. From a control station one can add a new custom functionality to a remote modem using software upgrade. It is also possible to upgrade TSMS framework using this feature.

Map view

Another important feature is displaying modems and servers in the map. Modems and servers can be viewed based on how they are scattered in the geographical area with its current state. Device in green colour indicates device is up & running. Device in red colour indicates device is down.