The Home of telecommunications network and service interoperability standards

Why does the UK need NICC standards?

NICC Standards Limited provides technical interconnect and interoperability standards that enable successful UK telecommunications calls, sessions and connections in an ever complex and fast-moving communications environment.

Tell me more

Working to reduce and prevent nuisance calls

NICC is working closely with Ofcom to reduce and prevent nuisance calls reaching customers.

Tell me more

Rollout of fibre in the UK

The UK is going through an unprecedented transformation as we rollout full fibre connectivity, with significant investment both from traditional infrastructure providers and new entrants.

Tell me more

The clock is ticking!

Take action now to stop devices & calls failing!

Tell me more

NICC current work

NICC specifications are being developed for the following technical activities and interfaces:

  • Ensuring interoperability of IP networks and service, developing signalling protocol interfaces
  • Stopping nuisance calls, managing CLI rules and implementation guidance
  • Delivering emergency calls over the network
  • Providing customer and network protection guidance
View all work

Latest Publications

Download ND1704 V4.2.1 End-to-End Network Performance Rules & Objectives for the Interconnection of NGNs
ND1704 V4.2.1
End-to-End Network Performance Rules & Objectives for the Interconnection of NGNs
Download ND1037 SIP - ISUP NNI Interworking
ND1037
SIP - ISUP NNI Interworking
Download ND1519 Implications and Consequences of the UK implementing ETSI ES 203 178
ND1519
Implications and Consequences of the UK implementing ETSI ES 203 178
Download ND1704 V4.1.1 End-to-End Network Performance Rules & Objectives for the Interconnection of NGNs
ND1704 V4.1.1
End-to-End Network Performance Rules & Objectives for the Interconnection of NGNs
Download ND1034 V2.2.1 UK SIPconnect Endorsement
ND1034 V2.2.1
UK SIPconnect Endorsement
Download ND1016 V4.3.1 Requirements on Communications Providers in relation to Customer Line Identification display services and other related services
ND1016 V4.3.1
Requirements on Communications Providers in relation to Customer Line Identification display services and other related services
Download ND1447 V1.1.1 Guidance on blocking of inbound international calls with UK Network Number as CLI
ND1447 V1.1.1
Guidance on blocking of inbound international calls with UK Network Number as CLI
View all publications

NICC Open Forum

2022 NICC Open Forum will take place on the 15th November 2022.

The presentations from the 2021 NICC Open Forum are now available. Please following the link below.

View all events

About NICC

NICC Standards Limited is a technical forum for the UK communications sector that develops interoperability standards for public communications networks and services in the UK. It is an independent organisation owned and run by its members.

It is now necessary to be a member to participate in NICC activities. Learn more about NICC membership.

Tell me more