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    ContractsVoice System Modernisation: Cloud and On-Premises Hybrid Solution
    Open tender

    Voice System Modernisation: Cloud and On-Premises Hybrid Solution

    Contract value
    £55m
    Published 14 Jul 2026

    Design and deliver a hybrid cloud and on-premises voice system to modernise the Authority's enterprise telecommunications infrastructure across 113 sites with 5-year operational support.

    🇬🇧United Kingdom· South WestPublished 14 Jul 2026· 2 months agoviaFind a Tender
    Contract value
    £55m
    Published 14 Jul 2026

    Decision brief

    4 fields
    • Contract value
      £55,000,000indicative
      Pounds sterling
    • Closing date
      Rolling
      No closing date published
    • Sector
      Facilities Management
      Browse related listings
    • Location
      🇬🇧United Kingdom
      South West

    Lifecycle

    Open

    Open tender — no closing date published. Opened 2 months ago.

    14 July 2026
    Open tender · no closing date published

    Brief

    The Authority requires modernisation of its ageing enterprise voice system (VOX NOVA Fixed Voice OFFICIAL and Enterprise Voice). The project involves designing, building, migrating to, and operating a hybrid voice architecture that combines cloud-native call management with on-premises calling capability. Key deliverables include: design and implementation of a cloud-native call management platform (SaaS or UK zoned public cloud); migration of existing gateways and SIP-enabled PBX systems; modernisation and SIP enablement (or replacement) of legacy non-SIP PBX systems; through-life support for legacy PBX infrastructure during transition; resilient public telephony breakout and partner connectivity; local survivability for specific sites; and field engineering support to ensure compliance with Authority processes. The existing infrastructure comprises approximately 113 sites and 180 nodes serving up to 65,000 telephone endpoints, predominantly using analogue lines with limited digital and VoIP connectivity. The anticipated contract term is 5 years across two lots: Lot A covers design, build and operations; Lot B covers legacy system support.

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    Take action
    View tender on sourceFind a Tender

    Full notice and submission process on the publisher's site

    Publisher
    UK Cabinet Office
    Licence
    OGL v3.0
    Source
    find-tender.service.gov.uk
    Record ID
    ocds-h6vhtk-06cab4
    DD
    Buyer
    Defence Digitial
    Sector
    Facilities Management