SIP Tenders and Contracts in London

35 matching notices from public sector buyers in London, 0 published in the last 30 days.

Recent buyers include London Metropolitan University, Royal Botanic Gardens Kew and Money And Pensions Service.

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35 results

Awarded contractPublished 16 June 2026
Gamma phone contract
London Metropolitan UniversitySupplier(s) GAMMA NETWORK SOLUTIONS LIMITEDTelephone connectionsAwarded 1 May 2026
£66,000
Awarded contractPublished 27 November 2025
RBGKEW1359 Microsoft Teams telecom services
Royal Botanic Gardens KewSupplier(s) GAMMA NETWORK SOLUTIONS LIMITEDTelecommunications servicesAwarded 12 November 2025
£19,000
Awarded contract, expiring in 11 monthsPublished 4 November 2025
Contact Centre as a Service
Money And Pensions ServiceSupplier(s) KERV DIGITAL LIMITEDContact management software packageAwarded 24 October 2025
£9,187,844
Awarded contract, expiring 13 January 2029Published 31 July 2025
Microsoft Teams and Five9 Unified Communications Offering with associated Gamma SIP Trunks
Health and Care Professions CouncilSupplier(s) OPUS BUSINESS SYSTEMS LIMITEDCommunication software packageAwarded 25 July 2025
236,210
Awarded contract, expiring 31 May 2028Published 18 June 2025
Direct SIP Services (Telephony) Direct Award via CCS Network Services 3Lot 4b: Digital Communication Services (Unified Communications)
The United Kingdom Sports Council (trading as UK Sport)Supplier(s) British Telecommunications PLCTelephone networkAwarded 1 June 2025
£54,335.52
Awarded contract, expiring in 7 monthsPublished 12 June 2025
Session Initiation Protocol (SIP) Telephony
UK Health Security AgencySupplier(s) Gamma Telecom LTDTelephone network equipmentAwarded 11 June 2025
£114,098.64
Awarded contract, expiring 30 June 2030Published 5 June 2025
SIP Lines
The Insolvency ServiceSupplier(s) GAMMA NETWORK SOLUTIONS LIMITEDIT services: consulting, software development, Internet and supportAwarded 18 March 2025
£207,146.4
Stale Pre-tenderPublished 22 May 2025
Managed Service telephony service
Bank of EnglandIT services: consulting, software development, Internet and support
£3,200,000
Awarded contract, expiring in 8 monthsPublished 31 July 2024
Daisy Telephony Services - Fixed Lines & SIP Trunks
City of London CorporationSupplier(s) WN CORPORATE SERVICES TRADING LIMITEDTelecommunications networkAwarded 1 July 2024
£690,064.01
Awarded contract, expiring in 5 monthsPublished 17 July 2024
Session Initiation Protocol (SIP) Telephony 24-27
UK Health Security AgencySupplier(s) Gamma Telecom LTDTelephone network equipmentAwarded 26 June 2024
£113,256
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Stale Pre-tenderPublished 14 March 2024
Telephony
Office of Communications (Ofcom)Call centre
Value not stated
Expired contract, expired 29 September 2023Published 26 January 2024
Telephony migration to the cloud
London Borough of IslingtonSupplier(s) ADEPT TECHNOLOGY GROUP LIMITEDTelecommunications servicesAwarded 3 October 2022
£212,400
Expired contract, expired 31 March 2026Published 8 June 2023
Cloudbased SIP Telephony
London Borough of NewhamSupplier(s) WN CORPORATE SERVICES TRADING LIMITEDIT services: consulting, software development, Internet and supportAwarded 1 April 2023
£321,447.08
Awarded contract, expiring in 8 monthsPublished 6 June 2023
Unified Communication Systems
London Borough of MertonSupplier(s) Cisilion LimitedAwarded 3 July 2023
£1,500,000
Expired contract, expired 31 March 2026Published 11 April 2023
SIP Trunk/Cloud SBC Service
London Borough of HaveringSupplier(s) WN CORPORATE SERVICES TRADING LIMITEDIT services: consulting, software development, Internet and supportAwarded 1 April 2023
£198,745.72
Expired contract, expired 10 April 2022Published 5 April 2023
PHE_ICT_SIP Trunks_Resilient SIP Trunking (gCloud)
UK Health Security AgencySupplier(s) Gamma Telecom LTDTelecommunications servicesAwarded 11 April 2021
£162,434.16
Awarded contractPublished 15 August 2022
Cloud Voice SIP Service & Channel Connection
Surrey County CouncilSupplier(s) British Telecommunications PLCIP telephone servicesAwarded 31 March 2026
£45,360
Awarded contractPublished 14 April 2022
R5828 Telephony Solution
London Borough of Tower HamletsSupplier(s) Bell lntegrationMaintenance services of telecommunications equipmentAwarded 14 April 2022
£1,801,254
Expired contract, expired 14 October 2025Published 28 October 2021
Session Initiation Protocol (SIP) & Direct Inward Dialling (DDI) Agreement
Pension Protection FundSupplier(s) VIRGIN MEDIA BUSINESS LIMITEDTelecommunications networkAwarded 15 October 2021
£53,812.8
Expired contract, expired 7 April 2023Published 7 May 2021
FoNT PSTN Re-procurement
Department for Environment, Food & Rural Affairs (DEFRA)Supplier(s) Intercity Technology LimitedTelemetry equipmentAwarded 22 March 2021
£425,000

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PHE_ICT_SIP Trunks_Resilient SIP Trunking (gCloud)

R5828 Telephony Solution

FoNT PSTN Re-procurement

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