What is BS EN 13757‑1 about?  
Meters put businesses and consumers in control of their energy use, allowing them to adopt energy efficiency measures that can help save money on their energy bills and offset price increases.
For the energy and utility companies utilizing the data from those meters and the manufacturers that make them, it is crucial that the data being collected is accurate and safeguarded in line with applicable data protection legislation.
BS EN 13757‑1 specifies data exchange and communications for meters in a generic way. It establishes a protocol specification for the Application Layer for meters and establishes several protocols for meter communications which can be applied depending on the application being fulfilled.
BS EN 13757‑1 also specifies the overall structure of the Object Identification System (OBIS) and the mapping of all commonly used data items in metering equipment to their identification codes.
Note: Electricity meters are not covered by this document, as the standardization of remote readout of electricity meters is a task for CENELEC/IEC.
Who is BS EN 13757‑1 for? 
BS EN 13757‑1 on data exchange for meters is applicable to: 
- Energy and utility service providers
- Meter manufacturers
- Service personnel of meter systems
Why should you use BS EN 13757‑1?
Data transferred between meters and head-end systems is regarded as the private data of the energy user, and therefore is subject to EU and national rules for data protection.
The main use of BS EN 13757-1 is to provide an overview of the protocols at the different levels and to provide a specification for the DLMS/COSEM application layer for meters.
These protocols are vital for ensuring the accurate data communications of meter systems, and they help to reduce information loss during transmissions.
Ultimately, BS EN 13757‑1 helps manufacturers and users of meter systems to ensure the accuracy, protection, and consistency of the data they provide.
What’s changed since the last update? 
BS EN 13757‑1:2021 supersedes BS EN 13757‑1:2014, which is withdrawn.
Significant technical changes between BS EN 13757‑1:2021 and BS EN 13757‑1:2014 are:
- The text has been updated to reflect increased use of IPv6
- Key wrapping has been added
- Mandatory COSEM Objects have been added
- A description of pre-established Application Associations has been added
- A reference to GSM CSD has been
