What is TAC (Type Approval Code)

Unveiling the TAC (Type Approval Code) in Wireless Communication

Within the realm of mobile communication devices, the Type Approval Code (TAC) serves as a crucial identifier embedded within the International Mobile Equipment Identity (IMEI) code. It plays a vital role in ensuring device compliance with regulatory standards and facilitating network connectivity.

Understanding the Importance of TACs:

• Cellular networks rely on specific technical specifications for devices to operate seamlessly and efficiently.
• The TAC acts as a marker indicating that a particular device model has been approved by a recognized testing body, meeting the necessary regulatory requirements for operation on the network.
• This approval process ensures devices adhere to standards related to factors like:
  • Radio frequency emissions
  • Network protocols
  • Safety and health regulations

Evolution of TACs:

• Prior to 2003, TACs were typically six-digit codes. They comprised two parts:
  • The first two digits identified the national or regional approval body that granted the type approval.
  • The remaining four digits served as a unique identifier for the specific device model.
• After 2003, industry standards transitioned to an eight-digit TAC format managed by the Global System for Mobile Communications Association (GSMA). This change aimed to streamline the approval process and allow for a wider range of GSMA-approved bodies to grant type approvals.

The Role of TACs in the IMEI:

• The TAC forms the initial eight digits of the 15-digit (or 16-digit for IMEI-SV) IMEI code.
• The IMEI acts as a unique identifier for each individual mobile device, facilitating tracking, theft prevention, and network authentication.
• By incorporating the TAC within the IMEI, regulatory compliance information becomes an inherent part of the device's identity.

How TACs are Assigned:

• Manufacturers apply for TAC allocation from GSMA-approved bodies. These bodies then evaluate the device against relevant standards and regulations.
• Upon successful approval, the device model is assigned a unique eight-digit TAC.
• The manufacturer utilizes the allocated TAC to generate individual IMEIs for each device they produce. Here, the remaining digits of the IMEI (beyond the TAC) are typically used for internal manufacturing and tracking purposes.

Benefits of TACs:

• Ensured Network Compatibility: TACs help ensure devices operate within approved parameters, minimizing interference and promoting network stability.
• Consumer Protection: TACs indicate that devices meet safety and health regulations, providing a degree of assurance for users.
• Efficient Device Tracking: The integration of TACs within IMEIs facilitates device tracking and identification, aiding in theft prevention and network security measures.

Future of TACs:

• As mobile technology continues to evolve, the core function of TACs in ensuring device compliance remains relevant.
• However, the specific implementation might adapt to accommodate new device types and communication standards.
• Continued collaboration between regulatory bodies, testing organizations, and the GSMA will likely shape the future of TAC allocation and management.

Conclusion:

The Type Approval Code (TAC) serves as a critical element within the mobile communication ecosystem. By acting as a marker for regulatory compliance and being embedded within the IMEI, TACs contribute to ensuring safe operation, network compatibility, and efficient device management. As technology progresses, the underlying principles of TACs will likely remain essential for maintaining a robust and well-functioning mobile communication landscape.