---
title: "Session Initiation Protocol (SIP) Telephony"
ocid: "ocds-b5fd17-322babce-cbfa-4ffb-adf9-0692364e3cf0"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-b5fd17-322babce-cbfa-4ffb-adf9-0692364e3cf0"
markdown_url: "https://d3tenders.com/contract/ocds-b5fd17-322babce-cbfa-4ffb-adf9-0692364e3cf0.md"
json_url: "https://d3tenders.com/contract/ocds-b5fd17-322babce-cbfa-4ffb-adf9-0692364e3cf0.json"
source: "Contracts Finder"
current_stage: "Award"
buyer: "UKHSA"
published: "2025-06-12"
---

# Session Initiation Protocol (SIP) Telephony

Buyer: UKHSA  
Current stage: Award  
OCID: ocds-b5fd17-322babce-cbfa-4ffb-adf9-0692364e3cf0

[View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-b5fd17-322babce-cbfa-4ffb-adf9-0692364e3cf0)  
[Download OCDS JSON](https://d3tenders.com/contract/ocds-b5fd17-322babce-cbfa-4ffb-adf9-0692364e3cf0.json)

## Summary

The UK Health Security Agency (UKHSA), based in London, has completed the award stage of its procurement process for Session Initiation Protocol (SIP) Telephony services under CPV classification 32429000, signalling that the contract is in the services category. The procurement was executed as a call-off from a framework agreement using a selective method. Gamma Telecom Ltd was awarded the contract, which is valued at £114,098.64 GBP, running from 11th June 2025 to 10th June 2027. This procurement specifically excludes suitability for SMEs and VCSEs, focusing instead on large-scale suppliers.

Businesses involved in providing telephone network equipment and telecommunication services may find substantial opportunities in this procurement. Gamma Telecom Ltd's successful bid indicates that sizeable entities capable of meeting specialised SIP Telephony requirements are well-positioned for similar tenders. Engaging in such contracts can bolster business portfolios, extend market presence, and provide consistent revenue streams over multi-year periods. Companies seeking to compete in similar tenders should consider developing robust frameworks that align with large-scale government service requirements.

## Notice

Session Initiation Protocol (SIP) Telephony

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Contracts Finder |
| Latest notice | https://www.contractsfinder.service.gov.uk/Notice/f249fd13-fdb7-438e-9138-59ed4b762ea6 |
| Notice type | Award Notice |
| Procurement type | Framework |
| Procurement category | Services |
| Procurement method | Selective |
| Procurement method details | Call-off from a framework agreement |
| Tender suitability | Not specified |
| Awardee scale | Large |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 12 Jun 2025 |
| Submission deadline | 10 Jun 2025 |
| Future notice date | Not specified |
| Award date | 10 Jun 2025 |
| Contract period | 10 Jun 2025 - 10 Jun 2027 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £114,098 |
| Lots value | Not specified |
| Awards value | £114,098 |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Not specified |
| Awards status | Active |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | UKHSA |
| Locality | LONDON |
| Post town | East London |
| Postcode | E14 4PU |
| Country | England |
| ITL 1 | TLI London |
| ITL 2 | TLI4 Inner London - East |
| ITL 3 | TLI42 Tower Hamlets |
| Local authority | Tower Hamlets |
| Electoral ward | Canary Wharf |
| Westminster constituency | Poplar and Limehouse |
| Delivery location | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | GAMMA TELECOM |

## CPV Codes

### Divisions

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

### Codes

- 32429000 - Telephone network equipment

## Release History

- 12 Jun 2025 at 11:49 - Award - Award Notice - https://www.contractsfinder.service.gov.uk/Notice/f249fd13-fdb7-438e-9138-59ed4b762ea6
- 12 Jun 2025 at 11:48 - Award - Award Notice - https://www.contractsfinder.service.gov.uk/Notice/30c99eac-16ce-4013-902f-9a39ce512aff

## Documents

- https://www.contractsfinder.service.gov.uk/Notice/f249fd13-fdb7-438e-9138-59ed4b762ea6
  12th June 2025 - Awarded contract notice on Contracts Finder
- https://www.contractsfinder.service.gov.uk/Notice/30c99eac-16ce-4013-902f-9a39ce512aff
  12th June 2025 - Awarded contract notice on Contracts Finder
- https://www.contractsfinder.service.gov.uk/Notice/Attachment/e8993a37-a9f2-491c-9ec7-d00475ae136f
  C357700 Gamma SIP Telephony RM1557.14-G-Cloud-14-Lots1-3-Call-Off-Contract_Redacted
- https://www.contractsfinder.service.gov.uk/Notice/Attachment/1082457b-8c77-4e52-8d99-2792eb59a7b7
  C357700 Gamma SIP Telephony RM1557.14-G-Cloud-14-Lots1-3-Call-Off-Contract_Redacted

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-b5fd17-322babce-cbfa-4ffb-adf9-0692364e3cf0. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-b5fd17-322babce-cbfa-4ffb-adf9-0692364e3cf0.json.