The Intimate Communications Hub Interface (ICHIS) specification defines a common interface between Intimate Communications Hubs (ICH) and Smart Meters which will be deployed for the GB Smart Metering Implementation Programme.

The ICHIS defines the mandatory features required to ensure that an ICH can be used with any ICHIS compliant Host, as well as defining features reserved for future use or for specific implementations.

DCC will review the ICHIS as a minimum on an annual basis to ensure it remains fit for purpose and use. In Quarter 2 2019 the ICHIS was updated with:

  • Removing the Bit Error Rate (BER) test requirement;
  • Removing the Radio Frequency Noise limits from the Communications Hubs (Comms Hub) data sheets to ICHIS into a new Appendix B;
  • Replacing current test content in ICHIS with a new ICHIS test specification
  • Adding requirements to test multiple meters;
  • Adding a new Appendix A for CHAS information;
  • Making other minor changes to the specification such as amending references to standards and adding definitions to the glossary.

In Quarter 2 2020, ICHIS was updated to:

  • Introduce Fylingdales frequency band and EDMI Fylingdales DBCH CHAS (updates to Part F, Appendix A and Appendix B);
  • Amend Parts B, C and D to ensure consistency that the AC connection pins are forbidden on the Communications Hub;
  • Amend Part F sub-section 4.5 to correct an error in the drafting of the 8-meter 2SD and 3SD limits introduced in ICHIS V2.0; and
  • Part E to clarify voltage limits on the digital signalling connector.

Outside of the annual review, if you identify any changes or updates that are required, please emailĀ regulation@smartdcc.co.uk detailing the proposed change and accompanying rationale for the change.

ICHIS Technical Specification Document

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Published date: 31 July 2019

Effective date: 25 July 2019

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ICHIS V2.2 Final.pdf

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The ICHIS defines the mandatory features required to ensure that an ICH can be used with any ICHIS compliant Host, as well as defining features reserved for future use or for specific implementations.

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Version: 2.2

Published date: 24 April 2020

Effective date: 24 April 2020

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Intimate Communications Hub Interface Specifications DCC 1.1

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Published date: 16 November 2018

Effective date: 16 November 2018

DCC Guidance Note: ICHIS Compliance - Emissions Level Testing

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The Guidance note provides information on clarifying relevant reference documents, testing methods and insight on tools required by industry participants/device manufacturers of ICHIS Hosts (Hot Shoes, Cradles etc.) to verify compliance with ICHIS for use with DCC Communications Hubs and DCC Systems.

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Published date: 15 December 2017

Effective date: 15 December 2017

Device Reference Drawing RD0134-MA-20_A1_P8

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Published date: 09 December 2014

Effective date: 15 December 2017

Host Reference Drawing RD0134-MA-19_A1_P9

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Published date: 09 December 2014

Effective date: 15 December 2017

ICHIS Secretary of State Report

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Report to the Secretary of State, including information on costs and expenses relating to the Intimate Comms Hub Interface Specification (ICHIS), including the costs and expenses that are likely to result from initial design and any subsequent necessary development of Smart Meters, Communications Hubs, and Communications Hub Hot Shoes.

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Published date: 28 February 2014

Effective date: 15 December 2017

Intimate Communications Hub Interface Specification v1.0

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Intimate Communications Hub Interface Specification v1.0, published to the Secretary of State following industry consultation.

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Version: 1.0

Published date: 28 February 2014

Effective date: 15 December 2017

Intimate Communications Hub Interface Specification v1.0 tracked

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Intimate Communications Hub Interface Specification v1.0 - tracked changes. Published to the Secretary of State following industry consultation.

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Published date: 28 February 2014

Effective date: 15 December 2017

ICHIS Drawing RD0134-MA-19_A1_P9

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Please note that these are draft documents

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Published date: 20 February 2014

Effective date: 15 December 2017

ICHIS Drawing RD0134-MA-20_A1_P8

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Please note that these are draft documents

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Published date: 19 February 2014

Effective date: 15 December 2017

Intimate Comms Hub Specification_CSPN

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Intimate Communications Hub Specification (CSPN)

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Version: 0.1

Published date: 30 January 2014

Effective date: 15 December 2017

Comms Hub Datasheet_Central South TEF Cellular

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Communications Hub Datasheet Central and South Regions (Telefonica) - Cellular

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Version: 0.3

Published date: 30 January 2014

Effective date: 15 December 2017

Comms Hub Datasheet_Central South TEF Cellular_Mesh

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Communications Hub Datasheet Central and South Regions (Telefonica) - Cellular and Mesh

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Version: 0.3

Published date: 30 January 2014

Effective date: 15 December 2017