Sure! Here’s the translation into American English:
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An essential tool to facilitate operator switching and avoid connection errors.
In a context where changes in telecommunications service providers are increasingly common, fiber optic users have a key tool to simplify this process and minimize errors: the Unique Access Identifier (UAI). This solution, implemented since 2016, has become the “ID” for fiber connections in Telefónica’s network, and its use aims to streamline and enhance the customer experience.
What is the UAI?
The UAI is a 12-digit number that uniquely identifies a fiber optic connection in Telefónica’s network. This identifier is also used by operators accessing this network through indirect fiber (NEBA). Its function is similar to the CUPS (Universal Supply Point Code) found on electricity or gas bills, as it allows for precise identification of each user’s connection.
With the arrival of fiber optics, the old system based on fixed phone numbers has become insufficient. Many current connections no longer have an associated fixed line, necessitating the implementation of a specific method like the UAI to ensure proper identification of each fiber line.
How does the UAI work?
The UAI not only identifies connections in Telefónica’s network, but it is also a tool used by operators employing this infrastructure through the NEBA system. Since 2016, it has been mandatory for the UAI to appear on bills for customers using Telefónica’s network, facilitating operator changes and reducing potential issues associated with the process.
This system helps to:
- Reduce service provisioning times when switching operators.
- Avoid unnecessary disconnection processes, as the new operator can take direct control of the connection.
- Prevent errors such as duplicated bills or service interruptions for other users due to identification mistakes regarding the line.
Where can you find the UAI?
If you are a customer of Telefónica or an operator using Telefónica’s fiber, the UAI will appear on your bill. It is advisable to have this number handy if you plan to switch operators, as providing it to the new provider speeds up the process and reduces the likelihood of errors or delays in service activation.
The role of the CNMC
The National Commission on Markets and Competition (CNMC) plays a crucial role in regulating and improving processes related to fiber optics. From the requirement to include the UAI on bills to overseeing operator changes, its goal is to ensure that users can make quick and hassle-free transitions between providers.

With the growing digitization and expansion of fiber optics in Spain, tools like the UAI are essential to ensuring an efficient and transparent experience for consumers. The CNMC will continue to work towards optimizing these processes and preventing the inconveniences that may arise in a key sector for the country’s connectivity.