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The Operational Telephone System for HS2

Siemens Mobility Limited

This public procurement record has 1 release in its history.

Tender

05 Aug 2026 at 10:30

Tender Notice
Summary of the contracting process

Siemens Mobility Ltd is procuring the Operational Telephone System for HS2, an integrated, route-wide communications system supporting HS2 operations and maintenance. The requirement covers VoIP telephony servers with redundancy, station SIP servers, voice recording, operator HMI touchscreens, fallback and equipment-room IP phones, high-noise tunnel telephony, ruggedised trackside and tunnel phones, refuge-area help points with induction loops, computer telephony integration, softphones, session border control, PSTN connectivity, management tools and maintenance terminals. It also includes a reference system and the associated hardware, software and firmware. The system must interface with engineering management, train dispatch, station information, lift phone, PAVA and Network Rail telephony systems. Delivery covers the HS2 line of route, including Euston, Old Oak Common and Curzon Street stations, across the United Kingdom.

The process reached tender: Siemens Mobility invited suppliers to submit offers through a tender procedure. The submission deadline set by the buyer is 18 August 2026 at 17:00. The contract is scheduled to run from 8 March 2027 to 17 October 2033. Its estimated value is between £1,000,000 and £2,500,000, inclusive of the stated minimum and maximum estimates. The procurement is categorised as goods, covering emergency telephones, telephone equipment, telephone exchanges, radio and telephone control systems, and railway engineering services. The requirement is presented as a single route-wide procurement rather than separate lots. The system must be sized for 1,600 line-of-route end devices, 430 at Euston, 605 at Old Oak Common and 400 at Curzon Street.

This opportunity suits established rail-telecommunications or critical-infrastructure technology suppliers able to design, supply, integrate and maintain a complex operational voice system. Relevant capability includes SIP and VoIP architecture, resilient server deployment, PSTN and SIP-trunk connectivity, voice recording, CTI, softphone and SDK development, systems management, and integration using industry-standard protocols. Suppliers must be able to provide specialist equipment for railway environments, including ruggedised trackside and tunnel telephones, high-noise equipment-room devices and refuge-area help points with induction loops. The requirement also calls for a reference system and support for a substantial distributed estate spanning stations, depots, tunnels and other infrastructure locations. The procurement is not identified as suitable for SMEs or voluntary, community and social enterprises.

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Notice Information

Notice Title

The Operational Telephone System for HS2

Notice Description

The HS2 Operational Telephone System shall provide an integrated, route wide, telephone communications system at key infrastructure locations to support the operation and maintenance requirements of HS2. The Operational Telephone System shall be based on VoIP technology and consist of the following sub systems: * SIP Telephony Server (at primary + secondary location for redundancy) * Station SIP server at each of the four HS2 stations, to provide SIP solution for Station end devices (end devices are provided by the HS2 station contractor). * Voice Recorder * HMI touch screens - for use by HS2 NICC operations staff, Station Controllers, Depot Controllers to make and receive operational calls. * IP Telephony consisting of the following: o Fallback IP Phones - suitable for operators desk and will act as a fallback for the OTS HMI o Equipment Room IP Phones - suitable for desk or wall mounted within equipment rooms and REBs. o Tunnel Ventilation Equipment Room - IP telephony or intercom suitable for high background noise environments. o Ruggedised Direct Line and Keypad phones - suitable for highspeed rail trackside, tunnel locations (telephone instruments shall be suitable for aerodynamic effects for line speed of 360kph) and external environments. o Refuge Area Help Point with Induction Loop * Computer Telephony Integration (CTI), Softphone client & SDK * PSTN - OTS shall be connected to Public Switched Telephone Network (PSTN) * Session Border Controller - for SIP trunks to external systems * Management and maintenance terminal for the OTS * Supply of a reference system, comprising of single SIP server (hardware + software), HMI (inc software), VoIP Desk phone, Refuge help point, Ruggedised Direct line + Keypad phone, call logging and recording. * All hardware and software/firmware to deliver the above, noting that certain aspects can be proposed to be virtualised (eg SIP server). Siemens have quantified the list of OTS equipment required will be provided during the tender, but shall be sized for the following equipment and end devices: * 1600 end devices across the Line of Route (inc NICC, depots, Railways Systems Compounds, Tunnel Telephones, Radio Mast Compounds etc) * 430 end devices at Euston Station * 605 end devices at Old Oak Common Station * 400 end devices at Curzon Street Station The OTS shall interface with following other systems through the use of industry standard protocols and CTI: * Engineering Management System (EMS) - alarm management and supervision * Train Dispatch System (TDS) - provision of a softphone client * Station Information Management System - provision softphone client/SDK * Lift phones * Cross Passage PAVA Systems - this interface will enable the OTS to be used to make PAVA announcements * Network Rail Telephony Network

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-b5fd17-f1ffadd6-02da-43d6-95fa-6c8fedca3498
Publication Source
Contracts Finder
Latest Notice
https://www.contractsfinder.service.gov.uk/Notice/3abc9982-6f43-4d46-aa0e-2ac399599e7a
Current Stage
Tender
All Stages
Tender

Procurement Classification

Notice Type
Tender Notice
Procurement Type
Standard
Procurement Category
Goods
Procurement Method
Not Specified
Procurement Method Details
Tender Suitability
Not specified
Awardee Scale
Not specified

Common Procurement Vocabulary (CPV)

CPV Divisions

32 - Radio, television, communication, telecommunication and related equipment

71 - Architectural, construction, engineering and inspection services

CPV Codes

32344270 - Radio and telephone control system

32550000 - Telephone equipment

32551200 - Telephone exchanges

32552120 - Emergency telephones

71311230 - Railway engineering services

Notice Value(s)

Tender Value
£2,500,000 £1M-£10M
Lots Value
Not specified
Awards Value
Not specified
Contracts Value
Not specified

Notice Dates

Publication Date
5 Aug 20262 months ago
Submission Deadline
18 Aug 2026Expired
Future Notice Date
Not specified
Award Date
Not specified
Contract Period
8 Mar 2027 - 17 Oct 2033 Over 5 years
Recurrence
Not specified

Notice Status

Tender Status
Active
Lots Status
Not Specified
Awards Status
Not Specified
Contracts Status
Not Specified

Buyer & Supplier

Contracting Authority (Buyer)

Main Buyer
Siemens Mobility Limited
Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
LONDON
Postcode
NW1 2PL
Postcode Area
North West London
Country
England
Major Region (ITL 1)
TLI London
Basic Region (ITL 2)
TLI3 Inner London - West
Small Region (ITL 3)
TLI36 Camden
Delivery Location
Not specified
Local Authority
Camden
Electoral Ward
Regent's Park
Westminster Constituency
Holborn and St Pancras

Further Information

Notice Documents

Open Contracting Data Standard (OCDS)

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The Open Contracting Data Standard (OCDS) is a framework designed to increase transparency and access to public procurement data in the public sector. It is widely used by governments and organisations worldwide to report on procurement processes and contracts.

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