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Technology Partners

Who we are

A group of five UK-based, world-class electronic security manufacturers have united to create something never seen before - an alliance that brings together best-in-breed specialists collaborating to offer customers innovative security solutions and integration technology without sacrificing freedom of choice and forcing compromise. Through cooperative product developments, support and distribution partnerships and an open-arms approach to support, they are working to improve the customer experience for installers and end users around the world.

Harmony alliance members are experts in their specialty. The alliance brings them together to develop unique solutions for customers, making each individual part of the security system work more effectively with each other part. They work with integrators to help customers solve problems, and ultimately, protect the lives, livelihoods and properties of our end-users.
Harmony Alliance (TDSi - Texecom - Elmdene - GJD - Advanced LED Technology)


Texecom is Europe’s largest independent security alarm specialist providing bespoke design solutions that protect people and property throughout the world. Established 25 years ago, Texecom’s award-winning products cover every aspect of external and internal security requirements.

Including a full range of motion detectors, control panels, perimeter protection devices, fire detectors and external sounders, Texecom has recently launched a new ground breaking wireless technology, Ricochet mesh networking, to universal acclaim.

Texecom is Europe’s largest independent security alarm specialist company


GJD Manufacturing Limited is an industry leader in the design, manufacture and supply of professional external detector equipment, as well as CCTV and security lighting controllers utilised in the intruder surveillance sector.

Based in Heywood, Manchester, GJD's team has extensive knowledge and expertise, with over 30 years of experience in the security lighting industry.


Elmdene International Limited is a manufacturer of Electronic Products for the Security, Access Control, CCTV and Fire Industries around the world, including Power Supplies, External/Internal Sounders, and Magnetic Contacts in addition to a range of Ancillary products.

Established over forty years ago Elmdene International Limited has enjoyed steadfast growth based on the design and production of reliable products for those specific markets.

Integration Partners


EXgarde 4.1’s integration with both Milestone’s XProtect Enterprise and Corporate video management software is part of a wider drive to unite traditionally disparate components of business security. Recognising the power of compatible systems, TDSi and Milestone’s systems are designed to be highly complementary to one another, providing excellent results and superb value for money. In the case of the CCTV integration, users can view live video from any camera within the EXgarde Explorer window, so an incident reported by the access control system, for example, can immediately be investigated visually.

Microsoft® Active Directory

TDSi now intergrates directly with Microsoft® Active Directory, so physical security systems can be directly synchronised with logical security and the central business facility database can provide an overall view of any situation. as users gain access their location is logged with Microsoft®Active Directory, which is the keystone to many modern build control systems. Any security breach can also trigger IT system protocols that control the level of access available in certain areas, to minimise the possibility of unwarranted removal of data. This offers a superb way to integrate physical security with the IT security systems to provide a total picture of organisational security.


Aperio™ technology is a smart that enables mechanical locks to be wirelessly linked to an existing access control system in a convenient and cost-efficient way.

  • Additional doors can be integrated into access control systems at a low cost
  • Aperio™ can be combined with new and Existing access control systems
  • Easy to install with no structural alterations to the door
  • Standard RFID technologies supported
  • Battery-operated Aperio™ escutcheons and cylinders Provides RFID Card reader
  • Wireless communication Between Aperio™ cylinders / escutcheons and communication hubs
  • Aperio ™ can update access Authorisations room online and in real time

The open architecture of Aperio™ provides a convenient way of connecting with Most access control systems via RS485 or Wiegand interface. The Aperio™ cylinders or escutcheons communicate via an encrypted wireless link to a communication hub That Is Directly wired to the system.

Aperio technology
Contact us
Unit 10 Concept Park,
Innovation Close,
Poole, Dorset,
BH12 4QT
United Kingdom

Telephone +44(0)1202 723 535
Fax +44(0)1202 724 975
Telephone (Sales) +44(0)1202 723 535
Telephone (Support) +44(0)1202 723 535

TDSi Northern Training Facility

Executive Suites
St James Business Centre,
Wilderspool Causeway,

TDSi France
Immeuble ATRIA, 2 Rue du Centre
93160 Noisy Le Grand, France

Telephone +33(0)1 58 84 20 90
Fax +33(0)1 58 84 20 91
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