Dunedin Facilities Management Ltd is an SIA Approved contractor, who's management and staff are veterans of law enforcement and the security industry. The company is a premier provider of security services like security guards, CCTV security, mobile patrol, door supervisors, key holding and event security solutions.

Duxbury Networking is a distributor of IP telephony, wireless solutions, networking and support, to a number of thriving businesses throughout South and Sub-Saharan Africa. It specialises in IP networking, switching, wireless networking, routing, network security, point-to-point, point-to-multipoint, WAN, NAS, 3G/4G/Mobility. The surveillance solutions take care of all needs, from installing cameras to maintaining the security of network.

DV Comm Systems is a single provider and installer of network and communications support services. DV Comm Systems provides network cabling, home security systems, security cameras, ethernet cable, and fibre optic cable installation. Its four-step process consists of consultation, system design, system installation and cable certification and support.

Dummy Camera offers tamper resistant steel lockboxes for VCR, and DVR for security application.

DVS Limited is one of the Europe’s most successful multi-brand distributors of electronic surveillance products. The company is an authorised UK Distributor of Hikvision, Arecont Vision, FLIR Thermal Imaging Infrared Cameras, iiyama monitors, Luminite electronics, NUUO video management, Prism Skylabs, Tamron lenses and Videotec. DVS supplies CCTV cameras, IP video solutions & digital recording surveillance systems, CCTV software, etc.

DVTEL is the pioneer and dominant market player in the creation, development, and delivery of Multi-source Intelligence Systems over IP networks. Our software-based solutions create superior value for a wide range of customers by providing them a unique level of freedom to focus on what’s most important—their primary strategic and business goals.

D.W. Price Security was established in 1998 by the current directors who each have more than 30 years experience within the physical security sector. The products include, door sets, counters, glazed screens of varying type, windows of varying type, transaction facilities and a comprehensive range of ancillary products.

Founded more than two decades ago, DWC is the premiere way to add real value to company while simultaneously earning more income. Working in conjunction with a leading actuarial firm and program underwriters, this is the industry’s best hardware warranty. The company has added equipment warranty plans for security, surveillance, fire control, and parking control and security gates.

DWG is the U.S.A's leading custom electronics, alarm and security wholesale distributor, offering a full line of video surveillance, access control, intrusion, sound, fire, home automation, and data connectivity products. They supply their full line of quality products strictly to security, information technology (IT), fire, audio-video (AV) and electrical professionals throughout the United States.

DWW Alarm and Safety Systems GmbH was founded in 1984 in Düren. The company offers companies and individual customers advice/planning, construction, and maintenance services in the field of safety engineering. DWW's range of services consists of Intrusion detection systems (VdS), Fire alarm systems (VdS), Video surveillance systems, Access control systems (VdS), Time Management, Information and communication transmission techniques.

Dyfed Alarms Ltd is one of the largest independent suppliers and installers of intruder alarms, CCTV, fire detection systems and access control equipment in Wales. The company offers a wide range of security equipment and provides industry leading installation and maintenance services for both residential and commercial customers. Dyfed also offers 24-hour alarm monitoring and response, scheduled and emergency maintenance.

Dyna Group is an engineering company in in Buenos Aires, Argentina. The company offers installation services for vehicle control systems, industrial automation and instrumentation, electronic, electromechanical circuits etc. Dyna Group operates in toll collection systems, access control, radio frequency identification (RFID), Systems of information processing, automatic barriers and equipment for vehicle detection etc.

DynaColor focuses on providing its customers total video surveillance solution, synchronising video camera products, digital video recorders and system control units. The company offers security systems such as high-speed dome cameras, IP cameras, digital video recorders, network video recorders, video servers, control keyboards and accessories.

DynaColor dedicates itself to be an "image solution provider." Starting with award-winning CRT alignment system, DynaColor became the industry leader in high quality, cost effective multiplexer and industrial camera over the years. In the rapidly changing digital surveillance market, DynaColor develops a wide range of competitive products, which offer clients a comprehensive product portfolio and the flexibility for customisation.

DynaFire Service Solutions is Florida's fire alarm service provider of fire alarm, sprinkler, and suppression system solutions for businesses small to large.

Dynamark Monitoring, Inc.'s mission is to save lives and protect assets. To achieve this goal, they are always seeking to improve their technology, invest in their people, and strengthen the relationships with their customers. They have been protecting people and assets nationwide since 1972, and they are determined to change the alarm monitoring industry for the better.

Dynamark began protecting homes and businesses with quality, affordable security systems in the Richmond, VA area back in July 1981. From then until 1983, Frank Pegram managed the area Dynamark dealership. In May 1983, Frank changed the local security landscape by opening his own dealership/franchise in Richmond.

Dynamic CCTV Ltd. was founded in 1994 with the aim of reducing the high prices charged for CCTV equipment. They supply CCTV products and technical support.

Dynamic Security and Steel Solutions is providing services to its customers since 2009 and offers a wide range of security and automation assistance for commercial and industrial places.

Dynamic Security LLC, member of Atlas Telecom, provides leading edge telecommunication and security technologies with unparalleled customer services to individual and institutional users. The solution and product range offered by the company includes access & attendance control for people, vehicles and assets, perimeter security, CCTV, intelligent video analysing solutions, building management system, alarm centers, asset tracking and more.

Dynamic Systems Solutions is a systems integrator and technology provider, dedicated to delivering comprehensive, secure, and scalable solutions across enterprise networking, cybersecurity, and smart infrastructure domains, Building Management Systems (BMS) , Fire Alarm and Life Safety Systems , Smart Intercom & Home Automation , Security & Surveillance Systems(CCTV, DVR/NVR, IP camera systems) .