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HSCN technical guidance

Guidance, policy and best practice documents covering all technical aspects of HSCN. Documents on this page will be regularly reviewed and updated by NHS Digital as required.


The HSCN Internet Access Form

The HSCN Internet Access Form replaces the Data Security Centre (DSC) HSCN ANM Firewall Change Request Form. 

The form can be used if:

  • your CNSP has advised the port you are trying to access is not an allowed any/any port and you still require access
  • your CNSP has advised you are trying to access something that has been placed on the deny list, but you still require access - these requests will only be approved in exceptional and business critical circumstances
  • you had access to a site on the Transition Network (previously N3) but you do not have the same access on HSCN

Once completed, the form should be sent to the NHS Digital National Service Desk (NSD) via your local IT support route. When they get the form the NHS Digital DSC will assess the request and either make the necessary changes and confirm this to you or respond to advise that the request cannot be authorised. 

Download the HSCN Internet Access Form

For further details and guidance on using this form please see HSCN internet access issues guidance.

You can contact the NHS Digital National Service Desk by:

Telephone: 0300 303 5035


National Service Desk portal (TN or HSCN connection required):

HSCN QoS change request form

To request a change to a QoS configuration, download the change request form.

On the form, provide as much detail as you can, including: full contact details; information about the application and the reason for the configuration change; and the QoS class, IP address, and port/protocol (if applicable).

Email the completed change request form to the NHS Digital National Service Desk (NSD).

For further details and guidance see HSCN QoS - change requests and end-to-end configuration.

HSCN customer requirements discovery form

The HSCN customer requirements discovery form has been designed to support organisations migrating from the Transition Network to HSCN in capturing and consolidating information regarding their existing network estate and IT services.

The aim of capturing this information is to allow organisations to record what connections and services will be impacted by their migration to HSCN and prompt them to consider what replacement or new services they will require their HSCN CNSP to provide.

Information captured can be used to inform discussions with your chosen HSCN CNSP.

Policies and technical guidance for suppliers and users of HSCN


HSCN IP address management

Find all information relating to IP address management under HSCN, including the HSCN IP addressing policy, IP addressing good practice guidelines, IPAM process and change request forms.


HSCN Quality of Service overview

Quality of Service (QoS) is a set of techniques to manage resources within a communications network. This page provides details of QoS implementation across HSCN.


HSCN/Transition Network DNS

This document provides an overview of the Domain Name System on HSCN and the Transition Network, and the Domain Name System change request process.


HSCN readiness testing guidance note

This document describes activities which will help a HSCN customer identify and resolve potential migration related risks, ahead of time, which would otherwise cause issues during their live migration.


HSCN connectivity options

The Health and Social Care Network (HSCN) programme will provide new and significantly different network services to the N3 network it succeeds.


Business Applications Guidance

This document provides guidance on procuring standard business applications to replace N3 overlays and is aimed at health and social care organisations moving to HSCN from N3.


HSCN connectivity troubleshooting guide

This connectivity troubleshooting guide will assist in isolating the cause of basic connectivity issues when using HSCN. It includes network connectivity, web page and web application connectivity issues.


NHS Network Time Protocol guidance

The NHS Network Time Protocol (NTP) guidance describes the standards that NHS organisations should use to implement their NTP. This guidance will ensure they select and configure an appropriate NTP implementation based against their use cases and requirements.


Public WiFi over HSCN Access Circuits

This Health and Social Care Network (HSCN) public Wi-Fi over HSCN guide will assist in understanding and decision making when providing public Wi-Fi over HSCN access circuits.