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Video Call Conferencing Maryland, DC , Virginia

Video Calls and Conferencing Installations

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Video Call conferencing Maryland, DC, Virginia

Video Call Tele-Conferencing System Installations

Maximize ROI and decrease travel expenses with the latest in Video Tele-Conferencing systems.  Coza Inc. can help select the best way to get your point across, whether its across town or across the globe.  Start saving money, time, and energy with a Video Tele-Conferencing System today.  Check the product pages below to help find the right solution, or contact us with any questions you may have.

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VTC Carts

VTC The Basics

Whether the group is small or large, the basic hardware, software and communication technologies remain the same. Bandwidth and features change depending on the number of sites to be connected and the distances between those sites.

Basic needs include:

Connectivity: ATM, ISDN or IP

Hardware: Display Device, Camera Type, Speakers, Microphones

Software: Codecs: Audio, Video or Both 

Video teleconferencing



ATM: Requires third party ATM switch, ATM is widely used as a backbone technology in carrier networks and large enterprises,  but never became popular as a local network (LAN) topology. ATM is highly scalable and supports transmission speeds of 1.5, 25,  100, 155, 622, 2488 and 9953 Mbps. ATM is also running as slow as 9.6 Kbps between ships at sea. An ATM switch can be added  into the middle of a switch fabric to enhance total capacity, and the new switch is automatically updated using ATM’s PNNI   protocol.

ISDN: (Integrated Services Digital Network) is facilitated through a telephone service provider and acts as a telephone system  network. Prior to the ISDN, the phone system was viewed as a way to transport voice, with some special services available for data. The key feature of the ISDN is that it integrates speech, video and data on the same lines, adding features that were not available in the classic telephone system. There are several kinds of access interfaces to the ISDN defined: Basic Rate Interface (BRI), Primary Rate Interface (PRI) and Broadband-ISDN (B-ISDN).

IP: (Internet Protocol) is connection through a private network to the Internet or, in some cases where the camera has its own IP address, connection is direct to the Internet. This form has become more popular and cost effective. Connection is done through an Ethernet (RG45) port and security is typically handled through in-house network security .

Video Teleconferencing



Video, audio and data are displayed on Flat Screens, Traditional CRTs or Video Projectors. Major factors in determining display type are budget and room size.

Flat Screens:  Flat screens are ideal for smaller rooms, or where mulitple locations need to communicate. Several flat screens and cameras can be installed side by side for a multi-point video conference session. Flat screen VTC sessions tend to be in smaller groups, and are better for person to person conversations.

Projectors:  Projectors are ideal when a larger room is available for the use of a projection screen measuring 90″ +. Projection Videoconferencing installations tend to cater more to presentations with larger audiences, rather than smaller, one-to-one videoconferences.Cameras:  HD or non-HD

Speakers and Microphones:  A variety of strengths and styles available to meet your personal preferences.

Video Teleconferencing


A codec is a device or computer program capable of encoding and/or decoding a digital data stream or signal. The word codec is a portmanteau of ‘compressor-decompressor’ or, most commonly, ‘coder-decoder’.

Codecs encode a data stream or signal for transmission, storage or encryption, or decode it for viewing or editing. Codecs are often used in videoconferencing and streaming media applications. A video camera’s analog-to-digital converter (ADC) converts its analog signals into digital signals, which are then passed through a video compressor for digital transmission or storage. A receiving device then runs the signal through a video decompressor, then a digital-to-analog converter (DAC) for analog display. A “codec” is a generic name for a video conferencing unit.

An audio compressor converts analog audio signals into digital signals for transmission or storage. A receiving device then converts the digital signals back to analog using an audio decompressor for playback. An example of this are the codecs used in the sound cards of personal computers.

The raw encoded form of audio and video data is often called essence, to distinguish it from the metadata information that together make up the information content of the stream and any “wrapper” data that is then added to aid access to or improve the robustness of the stream.

Video Teleconferencing

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