United Kingdom


From SMEs to the public sector and enterprise, Gamma supplies communication solutions via our extensive network of trusted channel partners and also directly.

Gamma’s largest market is in the UK where the company’s network-based services are supplied to SME, Public Sector and Enterprise markets, mainly through a large network of over 1000 channel partners and also directly. Our high quality services include unified communications, SIP trunking, hosted phone systems, mobile and connectivity.

Offering competitive rates combined with outstanding customer service, we are able to respond quickly to our customers and partners needs through our agile business-only network.

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The Netherlands

Dean One, Nimsys, Schiphol Connect

Dean One is a rapidly growing telecom and internet provider to the Dutch business market. Together with over 600 channel partners, they provide VoIP, mobile and broadband services to over 150.000 business end users in the Netherlands.

Nimsys is the IT specialist for workspaces, installing and managing IP networks for companies and business centers and providing broadband, VoIP and other ICT services to multi-tenancy buildings.

Schiphol Connect is the telecom and internet provider at Schiphol Airport in the Netherlands, providing voice and broadband services to companies with an office in or around Schiphol.

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Dean One


  • Newbury

    Kings House
    Kings Road West
    RG14 5BY

  • London

    Holland House
    4 Bury St
    EC3A 5AW

  • Manchester

    The Malthouse
    Elevator Road
    Trafford Park
    M17 1BR

  • Portsmouth

    The Port House
    Marina Keep
    Port Solent
    PO6 4TH

  • Glasgow

    2 West Regent Street
    G2 1RW

  • Budapest

    Gamma Development KfT
    Széchenyi Rakpart 8
    1054 Budapest

  • Fareham

    Telsis Communication Services Limited
    Limited 6 Manor Court
    Barnes Wallis Road
    PO15 5TH
    United Kingdom

  • Darmstadt

    Telsis GmbH
    Robert-Bosch-Strasse 7

  • Amstelveen

    Dean One
    Krijgsman 12-14
    1186 DM
    The Netherlands

  • Amsterdam

    Nimsys B.V.
    Barbara Strozzilaan 201
    1083 HN
    The Netherlands

  • Schiphol

    Schiphol Connect BV
    Evert vd Beekstraat 63
    1118 CL
    The Netherlands