Consultation: Guidelines for Calling Line Identification Facilities
Launch date:19 September 2017
Modified at:21 September 2017
Calling Line Identification (CLI) gives consumers the ability to identify the person or organisation calling them, and to make informed decisions about how to handle incoming calls. CLI information can also be used for other functions, such as call tracing to identify the sources of nuisance calls or as a reference to help identify the location of a caller in emergency situations. Therefore, it is important that CLI data is provided correctly and delivered accurately.
We have introduced a new General Condition (GC) with new obligations on Communications Providers (CPs) to provide CLI facilities, including requirements that the CLI data provided with a call includes a valid, dialable telephone number which uniquely identifies the caller. In order to clarify what we expect CPs to do to implement these new requirements, we need to update our guidance, which sets out the principles that should be respected to ensure that CLI data can be used correctly.
These points of clarification relate to the fundamental principles, which will improve the reliability of CLI information: validity, privacy and integrity. The delivery of reliable CLI data to end-users, which respects the user’s privacy, relies on the data being correct in the first place and the co-operation of all the CPs involved in the chain to pass on this information correctly. The new obligations require CPs to ensure that CLI data is exchanged between different providers with greater accuracy and only valid CLI data is made available to end users. After implementation, the quality of the CLI information that is presented to end-users of these networks should improve, and provide end-users with better information about the caller. It would also assist regulators and enforcement bodies in tackling nuisance calls.