SECMP0037 Pairing Local PPMIDs

Proposer Andy Knowles
Lead Analyst Joe Hehir
Date raised 01/06/2017
StageRefinement Process
Implementation date Unknown
Latest update The Working Group and the SSC concluded that the proposed solution would not be viable due to its security implications. This modification has been placed on hold and superseded by DP094.

What is the issue?

SMETS1 meters use the GB mobile telephone networks for their Wide Area Network (WAN) connections. SMETS2 meters are not yet deployed in significant numbers, but those in two out of three Communications Service Provider (CSP) regions will also use GB mobile telephone networks for WAN connections. Thus, WAN performance in SMETS1 deployment gives the best current indication of the likely SMETS2 WAN performance in two out of three CSP regions. Utilita have found over 9% of their SMETS1 meters continue to have poor WAN coverage following install. This means that the meter has WAN intermittently and the WAN connection, to material number of premises, is not sufficient quality to deliver configuration Commands in a sufficiently timely manner.

What is the solution?

This modification seeks to remove the 60 minute limit requirement that Communications Hub (CH) currently have to allow the Hand Held Terminal (HHT) to join the Home Area Network (HAN) after power on. This is to give Suppliers the option of providing Prepayment Meter Interface Devices (PPMIDs) to their Consumers, that can join a HAN without requiring a reliable Wide Area Network (WAN) connection or engineer intervention.

Who is impacted?

Large Suppliers
Small Suppliers
Other SEC Parties


01 Jun 2017
Modification Proposal raised
08 Aug 2017
Working Group meeting
26 Feb 2019
Working Group meeting

Modification documents

SECMP0037/SECMP0038 February 2019 Working Group meeting summary
SECMP0037 August 2017 Working Group meeting summary
SECMP0037 Initial Modification Report
SECMP0037 Modification Proposal
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