Tactical Area Communications System (TASMUS)

​​TASMUS is a tactical area communications system which provides network centric communication infrastructure. The main goal of TASMUS is to provide a common picture of the battlefield in near-real time and shares data among battlefield systems. It facilitates fusion and display of intelligence information to commanders at all levels and handles the exchange of targeting data from sensor to weapon systems.
TASMUS aims to form mobile, survivable, flexible and secure network to support all the present and future communication requirements of the commanders in the tactical field.   
TASMUS brings together state-of-the-art military communication technologies while enabling access through wired user terminals, mobile radios, integrated Combat Net Radio networks and Tactical Wireless Local Area Network (LAN) in the tactical field.
TASMUS is deployed in the area of military operations such that, seamless communication between the army and battalion/company level is achieved. It provides interfaces to the strategic telecom and data networks, while providing connection to the existing Combat Net Radio systems via Combat Net Radio Interface.


The tactical battlefield is now becoming a ground for extensive digital data exchange where many sensors, weapons, computers and command centers need to exchange high speed data in order to perform effectively and coherently. Moreover, these units need to carry out their data exchange while on the move because the new military doctrines heavily emphasize on mobility and flexibility. On the battlefield, several command control functions such as air defense, fire support, maneuver control, intelligence, electronic warfare, and logistics support need to be executed simultaneously through rapid and reliable exchange of information. TASMUS provides the necessary communication support to all of these applications.
TASMUS provides;
  •  Full IP solution and incorporates IP, ATM and ISDN switching technologies together.
  • Communications services including; voice (clear/encrypted), data (asynchronous, synchronous, IP, X.25 packet data), graphics, video,  images, file transfer; and fax / video conferencing.
  • Information services including; the provision of a near-real time picture of the battlefield, digital map and geographic information,  meteorological information, intelligence reports, and logistic information.
  • Network management and planning system (SYSCON) that meets military network management and planning requirements by using both IP based SNMP protocol and NATO TACOMS POST-2000 system control concepts.
  • All of the Teleservices, Bearer Services and Supplementary Services defined in NATO TACOMS POST-2000, including military features.
  • Interfaces to the other strategic telecom and data networks, PTT networks, SATCOM and tactical Combat Net Radios.
  • Interoperability with the Other Nations, with Allied Networks, and with Strategic (Commercial/Military) Networks.
  • Electronic Protection Measures (LPI/LPT Capability, Link-by-Link TRANSEC & COMSEC and end-to-end encryption).
  • Mobility by providing service through Digital Radios.
  • Modular infrastructure which can be continuously upgraded according to the technological improvements and customer requirements.

​System Architecture

The system architecture consists of three interconnected subsystems, the Wide Area Subsystem, Local Area Subsystem and the Mobile Subsystem. 

​Local Area Subsystem

The middle layer is the Local Area Subsystem, which is formed by Access Points and Command Post Access Units. The Access Points provide wired user access and also constitute a gateway for the mobile users. Command Post Access Units contain IP based switch, Tactical IP Switch, which gives full data and Voice over IP communication capability to the users and tactical and secure Wireless LAN equipments. Interfaces to the strategic systems are supported on the Local Area Subsystem.

​Wide Area Subsystem

Wide Area Subsystem is the highest layer in the architecture, which carries out the backbone switching, constituted of the Nodal Points. Interfaces to the strategic systems are supported on the Wide Area Subsystem. The Nodal Points also constitute a gateway for the mobile users.
TASMUS enables interfacing to various Communication Systems, PTT networks, SATCOM and Combat Net Radios. SYSCON manages all subscriber profiles, COMSEC and TRANSEC features and system topology. Other equipment used with TASMUS includes: Software Defined Networking Radio family; Tactical IP Switch which is used in Command Post Access Units, the GRC-5218 Band III Line of Sight relay equipment; digital terminals; IP terminals; bulk encryption equipment and Radio Access Point switches.

​Mobile Subsystem

The lowest layer is the Mobile Subsystem. In the Mobile Subsystem, mobile subscribers use ASELSAN’s handheld and vehicular Software Defined Networking Radio’s to access the TASMUS switching backbone.

​System Management of TASMUS

On-line and off-line management of TASMUS network is carried by SYStem CONtrol Unit (SYSCON) that is utilized to manage the planning and execution of all the communication plans required for TASMUS network. SYSCON’s functions starts with off-line planning activities and covers all the online actions involved with running the plan on the field. 
SYSCON has three main functions :

System Planning

  • Network Planning : Node Placement, Link   Planning, Frequency Planning using Radio Coverage and Link Analysis.
  • Configuration Planning : Subscriber Planning, IP  Network - VPN  - QoS Planning, Device Configuration.

System Control

  • Configuration Management : Subscriber Management, IP Network Management, Device Management, Cryptographic Key Management  (using SNMP v.2c and 3).
  • Alarm Monitoring
  • Performance and IP Network Monitoring
• Position Tracking
• Inventory Management

Secure Communications with TASMUS

TASMUS provides high grade information and communication security as well as the mobility. All types of voice, data and video communication over the TASMUS network are secured by means of encryption prior to transfer to communication channels: 
  • Bulk Encryption Equipment provides secure data communication over E1/E2/E3 links. 
  • Multichannel Voice and Data Encryption Equipment provides secure data and voice communication over Engineering Order Wine (EOW) channels of Radio Link devices. 
  • IP Crypto Device provides a high speed and highly secure IP communication with its next generation IP network encryption standards. 
  • Aselsan Secure Key Management System (Security Manager) provides remote cryptographic key management and network  management functionalities for Cryptographic Products. 

All of the Cryptographic Products are designed with high security and high reliability requirements and are AMSG-720B TEMPEST proof devices.  

​Subsystems of TASMUS

TASMUS uses WBNR mode of Software Defined Networking Radios. SDNR’s are employed in Mobile Subsystem and SDNR Radio Access Point, designed especially for TASMUS, provides the access of mobile segment subscribers to TASMUS infrastructure.

​Tactical IP Switch

Tactical IP Switch provides IP based voice, data and video communication services for the Operation Center Subscribers in Command Posts. It enables communication among different IP based user equipments like LAN Equipment (PC, router), VoIP Telephones, Wireless Local Area Networks Equipment and provides fully integrated IP solution for radio networks Tactical IP Switch is completely based on IP for switching and routing functions. It provides numerous interfaces like Combat Net Radio, ITU-T E1/E2/E3, ISDN PRI, V.35.

​Tactical Secure Wireless Local Network (TS-WLAN)

TS-WLAN provides high speed, flexible, wireless and secure networking capability in tactical area. Fast network deployment and easy configuration of TS-WLAN is well suited to tactical operations compared to wired networks. TS-WLAN which is designed to run command, control and communication applications, provides infrastructure to meet high rate, end-to-end secure communication needs.  

GRC-5218 BAND III + 8 MBPS Frequency Hopping Radio Link

GRC-5218 is a radio link system developed to provide secure and reliable C4ISR networks in 21st century’s battlefield environment.  GRC-5218 offers the latest ECCM features in order to overcome today’s advanced electronic warfare threats :
  • Full Band Frequency Hopping at 8.448 Mbps (E2) and 2.048 Mbps (E1)
  • Built in Frequency Diversity 
  • Automatic Frequency Escape Function  in frequency hopping mode without any link failure 
  • Automatic Power Control
  • Two-level Forward Error Correction  

​​Secure IP Telephone 

Secure IP Telephone, supports encrypted voice/ IP data and video communications on the same terminal and fulfills the NATO SCIP standards. Secure IP Telephone is a rugged device that can be used in both tactical and strategic systems.  Secure IP Telephone supports approved military encryption algorithms NATO encryption algorithms. ​