After the 2004 tsunami, these towers were built in the Colombo district, Gampaha, six te Kalutara, Galle, Matara, e Hambantota, Puttalam, Ampara Batticaloa the Trincomalee, Mannar Mullaitivu and the Jaffna district.

Eleven towers can be operated from the Disaster Management Centre and another nine towers are at the level where they can be operated manually after going to the relevant location.

However, the number of towers that cannot be operated is close to 57. The technology for this has been provided by the American Signal Corporation.

After the construction, steps have been taken to upgrade the towers on several occasions, but it has been revealed according to the information obtained through the Right to Information Act that the technology of the towers are now outdated.