Tcom Closed Circuit TV Systems

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CCTV Surveillance


Tcom Fire & Security are specialists in the design, installation and maintenance of Closed Circuit Television Surveillance, Access Control and Remote Intruder Alarm Systems. We are fully approved by Insurers and Police, and accredited to NSI Gold and UKAS Quality Management systems to ensure that your premises or property are adequately protected, any system is professionally installed and maintained to satisfy current British & European Standards, Association of Chief Police Officers Policy (ACPO) and the requirements of the Association of British Insurers (ABI).

We supply, install & maintain CCTV systems anywhere in the UK and Europe offering a wide range of systems for commercial, private and residential properties. Our product portfolio is restricted to only a few manufacturers that have proven and enduring product development and improvement programs. Additionally, without exception, our suppliers must offer the very best in competitive pricing structures.

With systems to suit schools, universities, hospitals, offices, factories, compounds, building sites or homes, combined with the latest in video networking technology we will give you or your agents 24/7 access to live and/or recorded images locally and from any location that has access to the Internet or GPRS networks.

We specialise in IP CCTV with HD Infra-red cameras for night vision. We also provide an "off-site" Video Monitoring Service as an optional service for on-site security management of alarms, personnel and trespass activities, slashing any requirements for mobile patrols or manned security and the resulting costs.

Systems are available on a one off payment, rolling monthly contract or lease purchase basis. Our area of operation is London & Home Counties. There are exceptions outside of our preferred area where we provide systems and maintenance in Europe to a number of “special clients” where the confidential service and remote diagnostic support offered is greatly superior to alternative local suppliers.

Your enquiry will be handled discretely and competently by a member of our Project Management team, from initial survey through to completion, commissioning, training and any on-going after-sales maintenance and support activities. These individuals are experienced and expert in this field. “The prime objective” is to ensure total satisfaction for clients and in this way (the only way for TCom) develop and expand our client base and order book.

The following Codes of Practice demonstrate the requirement for competency in critical areas such as Design and Installation, Commissioning and Inspection Routines and a robust Local Management Process to guarantee optimum performance and reliability from any system.

CCTV – Codes of Practice

cctv ptz dome

BS 7958:2009:- Closed Circuit Television (CCTV). Management and Operation - Code of Practice

BS 8495:2007:-  Digital CCTV Recording Systems for the purpose of image export to be used as evidence - Code of Practice

BS EN 50132-7:1996:-   CCTV Surveillance Systems for use in security applications - Application Guidelines

BS 8418:2010:-  CCTV Installation and Remote Monitoring of detector-activated systems - Code of Practice

CCTV – Information

Bosch PTZ

Video Surveillance market has been subject to substantial growth for well over a decade now. The UK now has the world's highest concentration of CCTV Cameras in some areas. There are many types of system and camera’s available, but with so much choice, where do you begin to find the right CCTV camera to deliver the correct results?

CCTV Camera – Types

  • IP or Analogue: At first, IP and analogue cameras may seem more alike than they are different. Both cameras employ an analogue image sensor, which is either CCD (charge coupled device) or CMOS (complementary metal oxide semiconductor). Virtually, all analogue cameras use a CCD sensor and IP cameras can utilize either type. The analogue signal from the sensor is then converted to digital form by an analogue-to-digital converter and further processed by the camera's on-board digital circuitry (DSP)

    For an IP camera, the image is then compressed internally (encoded) and transmitted via a computer network (Ethernet) and is either stored in the camera or on a network video recorder (NVR).

    For an analogue camera, the image is then converted back to analogue by a digital-to-analogue converter so the image can be transmitted via to a video monitor or a digital video recorder (DVR), where the image is encoded and stored.

    The difference between the two types of cameras is therefore negligible. Primarily, the difference is where the video is compressed and what components it utilizes. There are, however, significant quality differences between CMOS and CCD sensors, with CCD holding a demonstrable advantage in image quality over CMOS. There can also be a significant cost saving with the use of IP on large area installations where sharing of any local computer network (LAN) is possible or where a network already exists and can be expanded.

  • Automatic Number Plate Recognition (ANPR) – Licence Plate Recognition (LPR) : Is a camera required to store Vehicle Number Plate information and required to react to a recognised plate number?

    License Plate Recognition System uses advanced network technology (NN) to capture a vehicle license plate number. ANPR/LPR systems come in single or multi-lane versions complete with camera and network hardware, artificial intelligence software, I/O Integration Kit to control physical security equipment such as barriers and gates etc. A database storage system for retrieval and analysis of the captured license plates.

  • Image Quality: Practically every type of CCTV camera is built complete with a Charge Couple Device (CCD) that is the device that converts light into a digital signal. It comes as a CCD chipset which allows the camera to record, display and transmit the images it sees. With each type of CCD chipset manufactured you will gain differing quality images and obtain some additional features with the cameras. The very best CCD chipsets on the market are manufactured by Sony, Panasonic & Sharp. Policy dictates that we do not use any cameras carrying any other chipset.

  • Digital Signal Processing (DSP): Through the use of different DSP techniques it is possible to adjust the video signal parameters to achieve higher levels of image quality from the output your camera sends. It is also possible to improve overall performance of your CCTV camera through DSP adjustment.

  • Night Vision: Apart from the image quality and performance, another important consideration is the features of your camera. If your surveillance system needs to record footage at night then you would require a night-vision enabled camera. What type will depend on what quality of pictures required. For instance if you require colour as often as possible or can you make do with black and white (monochrome) in lower light conditions? DSS Low light Camera's offer a better quality image in virtual darkness or Infra-red illumination is practical solution that will satisfy most lighting requirements to supply a respectable black and white image is acceptable.

  • Lenses: As with any camera the angle of view and focal length is critical in the provision of any required image. Most fixed - static cameras will be supplied with a lens that has focus adjustment to satisfy the specified view and a Vari-focal Lens is also an option available to enable wide angle or zoom adjustment at the commissioning stage. Lenses also come with an in-built 'Automatic Iris' to enable optimum performance in changing light levels such that would be experienced with any external camera.

cctv bullet camera

CCTV Camera Positioning

Careful consideration should be given to the positioning of each camera to obtain the best possible unobstructed view of any particular location that is to be monitored. Strategic positioning considerations should also enter into the content and design of any system to maximise the security impact.

  • Fixed - Static Camera’s: For reliable security we recommend static (fixed) Cameras, as very often during important incidents the Speed Dome is monitoring another area and no evidence is captured. All security risk areas like vehicle and personnel entrances, loading docks should have their own static camera.

  • PTZ Speed Domes: These are also dome shaped CCTV Cameras, but include pan, tilt and zoom capability. These cameras can be set up to follow routes and pause at pre-set positions. Most applications include a joystick - keyboard, operated by surveillance personnel. We recommend Speed Domes for use in expansive areas such as car parks or compounds.

CCTV - Network Types


Analogue Network: Analogue CCTV Systems require a coaxial cable connection from every single CCTV Camera back to the Recorder. This remains a competitive option on any smaller project requiring fewer cameras. A Power Supply is also required locally to each camera.

IP Network: Do your premises have existing Computer Networks (LAN Local Area Network) installed? If yes - then the installation of an IP Security Camera System might work out even more affordable. Instead of running long distances of coaxial and power-cable, only very short runs of affordable Cat V or Cat VI to the closest Network-Data-Points are necessary. Even the power for those cameras can be induced into the existing data network, using PoE Power Supplies (Power over Ethernet) - saving the installation of fused power outlets at all camera locations.

Reduced Cabling Costs: Even if the installation of a LAN should be needed at your projects location, the installation is in-expensive compared to massive coaxial runs. Sometimes many IP Cameras are in one general area. These can all be connected to a Network-Switch. This Switch only requires a single Cat V Cable connection back to the Recorder.

CCTV – Recording & Archiving

cctv bosch dvr

Digital Video Recorder (DVR): Choosing a DVR system can be a daunting prospect with the wide range of models on offer. This choice can be further exasperated by the use of jargon and misleading information. We will advise you on the most suitable and cost effective option to suit any new system. However, as the Recorder is the ‘heart’ of the system giving you the control and archive options it is advisable that you are made aware of the options before making any decision.

What is a DVR?: At it’s most basic level, a Digital Video Recorder, as used in the CCTV Industry is a device which can receive video signals from numerous cameras simultaneously and store the recordings on internal hard drives. Depending on the unit chosen, a DVR can offer numerous other benefits to an end-user, a breakdown of the most common jargon and additional functions are listed below.

Compression Algorithms: This describes the method used to compress the video for storage on the DVR. Most embedded DVRs use MPEG4 or J2000 as a compression method. J2000 is the most modern of the 2 compression methods and is found mainly on professional units, although MPEG4 is still a very popular compression method for 4 channel units.

Frame Rates: This is the number of images that the DVR is capable of recording per second. It is also where the most common listing “errors” exist. Whether deliberate or due to lack of knowledge, numerous listings and specifications quote “Live” recording at 100FPS. Upon closer inspection of specifications however, a lot of these recorders are only capable of 25FPS across all cameras and base the “Live” description on a 4 way screen split (CIF) being recorded at 25FPS not the individual cameras which can only be recorded at 6.25FPS.

The net result of this is that to obtain “live” recording of all cameras, each camera is recorded at 25% of its image size which obviously affects the quality of recorded detail. A true “live” recording unit is capable of recording each individual camera full screen (D1) at 25FPS. So a 4 Channel DVR would offer 100FPS across all cameras, an 8 Channel DVR would offer 200FPS and a 16 Channel Unit would offer 400FPS.

Recording Periods: When assessing stated recording times, it is wise to note that practically any DVR can be configured to store recordings over quite large time periods. However, this normally involves reducing image quality, resolution and the number of frames per second at which the video footage is recorded thus directly affecting the usefulness of any recorded video for evidence purposes.

The recording time of any DVR is therefore a variable and will depend on numerous factors such a motion detection, camera placement, frames per second per camera, image resolution and the quality of recordings.

Network/ Remote Access: This refers to the ability of the unit to provide remote viewing of both live images and recorded footage across the internet or Local Area Networks. Most network DVRs are supplied with their own client software which can be loaded onto a PC for this purpose. Higher Specification DVRs will normally allow access via a standard web browser such as Microsoft Internet Explorer which negates the need to load client software. Several machines also provide a DDNS service whereby a static IP address is not required and password protected access to the DVR can be achieved via the domain server site.

Simplex/Duplex/Triplex/Pentaplex: Put simply this is the number of simultaneous functions which can be used on the DVR unit.

  • Simplex – These units require recording to be stopped in order to view saved video footage

  • Duplex – These units allow simultaneous recording and playback/ search of recorded images

  • Triplex – These units allow simultaneous recording, playback and network/ remote access

  • Pentaplex – Recently numerous specifications purport to be pentaplex – simultaneous recording, playback, network and backup. In reality this criteria can be applied to most triplex units and tends to be a play on words: ie the majority of triplex recorders are capable of more than 3 simultaneous functions – sensor input/ output, PTZ control etc

Motion Detection: This allows better management and longer storage times of recorded images. The DVR only records when movement is detected on camera, eg. If used in a retail environment which is open 12 hours per day, the recorder will record all activity during opening hours but when the premises are closed will only record if motion is detected, effectively doubling the recording time of the recorder.

In a domestic environment, motion detection is an equally, if not more important feature when choosing a DVR. Most domestic camera installations involve external cameras. With motion detection, a householder can quickly and easily determine if there has been movement in target areas. Motion detection recorders record motion events in a log. This allows the user to quickly determine if there has been motion in monitored areas such as a back garden, then immediately view the recorded footage of what triggered the recorder, without having to trove through hours of recorded images.

More advanced DVRs use a programmable motion detection grid. This allows the “masking” of high movement areas such as trees or shrubbery, further elongating the recording times of the DVR.

CCTV - Monitoring Options

Alarms & CCTV Remote Monitoring – Codes of Practice

The following Codes of Practice demonstrate the requirement for competency in critical areas of Alarm Receiving & Remote Video Response Centre Systems, Management and Procedures.

BS EN 50518-3:2011: Monitoring and Alarm Receiving Centre - Procedures and Operational Requirements.

BS 8418:2010: Installation and Remote Monitoring of detector-activated CCTV systems - Code of practice.

CCTV – Handover and Certification


Once the system has been commissioned, the technician will demonstrate how to use the system and issue you with simple written instructions as part of a “User Guide”. “Good Housekeeping Guide” and System Record Book and “Test Routines” are included.

Once the system is fully complete and the installation is finished, the design, installation and commissioning a “Certificates of Compliance” and conformance supplied to the end user.

CCTV – After Sales Service & Maintenance

cctv cameras group 1

On-going corrective and preventive maintenance of the system will form part of your contract. Preventative maintenance checks will normally be carried out annually or every six months, both are offered as options. Systems with that are remotely monitored by an Alarm Receiving Centre (ARC) and are part of an alarm confirmation system will require two full routine inspection checks per annum as a minimum.

A maintenance contract is mandatory if a system has signalling to an Alarm Receiving Centre (ARC). Police Force Policies and Insurance Company approval of any system is conditional upon a maintenance contract being in force for any system.

As an inclusive part of any current confirmed alarm maintenance contract there is a call-out facility with minimum response time of same day or four hours in case of emergency. Our engineers provide a telephone response around the clock. In the majority of cases the cause of any problem is an error or simple mistake. Our engineers are always available to talk you through any problems and the correction procedure on these occasions.

CCTV – Warranty

New systems will carry a comprehensive labour and parts warranty of at least 12 months.

CCTV Brands Supported by TCom

Samsung, Sony, JVC, Panasonic, Bosch, Sanyo, Honeywell, Videoswitch, Vectus, Dedicated Micros, Dowshu, Dallmeier, AVTech, Pelco, Vista, Genie, American Dynamics

cctv samsung logo cctv sony logo cctv jvc logo cctv panasonic logo Int bosch cctv sanyo logo cctv videoswitch logoInt Honeywell cctv dedicated_micros logo cctv dowshu logo cctv dallmeier logo cctv avtech logo  cctv pelco logo cctv american dynamics logo  cctv mercer logo  cctv vista logo1  cctv genie logo