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Frequently Asked Questions about Nefsis Web and Video Conferencing

Feel free to browse our frequently asked questions and related topics below. See also our systems requirements, data sheet (PDF), and documents page. You can also contact us or schedule a live, video conferencing demo anytime convenient for you.

General Questions About Nefsis Video Conferencing

What is Nefsis?

Nefsis is the next generation web and multiparty video conferencing software and online service for business.

Where did you get the name Nefsis?

Nefsis is an Ancient Greek word signifying general consensus among a group of people — as in "We have achieved nefsis." This is what video and web conferencing is all about. Our Nefsis online service is available worldwide, and the name is easily recognizable and pronounceable by people of many language groups.

How much does Nefsis cost?

Nefsis Basic is FREE.

In addition, Nefsis Professional is available for a FREE 14-day trial ... You can start right now!

Nefsis video conferencing service subscriptions include unlimited use of all audio, video, and live sharing features shown on this site, assistance with desktop and conference room peripherals, plus unlimited conferencing minutes. You can meet online all you like, and rest assured your monthly expense is a fixed cost. Click here for our current price list for video conferencing software and online services.

What do I need to get started?

You need a Windows PC (2000 or later) and a broadband Internet connection. Browse our systems requirements for details.

Does everyone need to download Nefsis to communicate?

No. Only the meeting host needs a Nefsis account to start and run their own online meetings. Participants can join a conference at any time with a Web browser by just clicking on a link.

How does Nefsis produce such a high quality, multipoint video and live sharing experience?

Nefsis is a true cloud computing and parallel processing application. It was designed to leverage all the capabilities of your computer, including all the available cores and multimedia processor extensions. As your computer becomes more powerful, Nefsis adapts by offering an ever improving experience.

Please visit our multipoint video and advanced video conferencing technology pages to learn more about end-to-end parallel processing, multi-core concurrency, and Nefsis cloud computing.

The Nefsis Tray Icon & Contact List

What are the Nefsis tray icon, contact list and popup features?

The Nefsis Tray Icon with Contact List is an optional add-on. It makes getting into your own online meeting room faster and easier.

If you use Nefsis for everyday online meetings, you can take advantage of the Nefsis Tray Icon and with two clicks enter your own online meeting room. Included is the Nefsis Contact List and popups, which allow you to quickly send a popup message to anyone in your office on Nefsis. You can make repetitive popups into a template, so things like a 'phone call' or 'join my online meeting' can be sent at the push of a button.   More . . .

How do I easily get everyone in my office on Nefsis?

Use the [Add Group] button in the Nefsis Contact List to create a group for your office.    How to . . .

Are the Contact List and popups an extra cost?

No. These are optional add-ons that are free of charge.

Compatibility, Networking & Security Questions

Is Nefsis secure?

Yes—Nefsis authenticates all meeting hosts, offers conference room passwords, and supports SSL/TLS3 encryption on all communications from end-to-end. Nefsis can support military-grade transport layer security at full network line speeds.

To learn more about Nefsis multi-layer security, click secure video conferencing.

Explore Nefsis Dedicated for on-premise server options and more IT controls.

What ports does Nefsis use?

Nefsis uses the industry standard web ports 80 and 443 for secure communications. In some environments, it may optionally use another port.

What are the systems requirements?

You need Windows 2000 or later and a broadband Internet connection. For a premium visual experience, Windows Vista or later are preferred.

Browse our systems requirements for details.

Does Nefsis support Windows Vista 64-bit?

Yes — Support for the 64-bit edition of Windows Vista was added in June, 2009.

Nefsis also supports Windows Vista and Windows 7 transparency and glass effects. Nefsis fully supports the Aero interface, you can even share Aero applications.

Can I run Nefsis on Mac OS X?

At present Nefsis is a native Windows application, with support for a wide variety of browsers for conference participants.

However, you can run Nefsis on Mac OS X under Windows emulation. You can install the current version of Boot Camp (2009), which automates the creation of a separate disk partition and Win driver-set; then run Vista; and then create or join a Nefsis conference. This strategy has the advantage of handling device driver installation and on-going maintenance for you. This is the recommended strategy with the most reports of customer success. Detailed instructions on how to run Nefsis on a Mac...

An alternative approach is to install WMware Fusion and manage the Win device driver installation and update maintenance yourself. This approach is not recommended, but may be useful in some rare circumstances where specialized cameras or equipment would require manual device driver maintenance anyway.

Parallels Desktop is not compatible with Nefsis.

I am behind a firewall, does Nefsis still work?

Yes — Nefsis traverses firewalls and proxies and in most cases you don't need to make any firewall changes for Nefsis to work.

Can local network users communicate with Internet users?

Yes — Nefsis can seamlessly connect anyone, anywhere to a conference regardless whether that person is over the Internet, on your local network, another office or even on the road in a hotel using a wireless connection with their laptop—worldwide!

I have several participants, each behind separate firewalls, what about that?

Nefsis takes care of connecting all participants together for a seamless video conferencing experience usually with no changes whatsoever to firewalls.

Nefsis business-grade firewall and proxy traversal has been continuously improved over 11 years in multi-office customer environments.

How much bandwidth does Nefsis require?

All the encoding and compression in Nefsis is variable rate encoding. Nefsis will work over virtually any broadband connection.

Nefsis variable bitrate encoding means that all compression dynamically adjusts within your available network capacity. As network usage, latency and throughput changes, Nefsis adjusts automatically.

A typical video can take 128kbps for 15 frames per second. Nefsis matches or exceeds the bandwidth efficiency of most hardware video solutions. You can measure actual use in real-time with the Nefsis built-in bandwidth monitor, available under the Help menu.

For more information, please visit video conferencing bandwidth.

I have QoS-capable routers and switches, can I prioritize video conferencing?

Yes, but there are limitations. You can make quality-of-service (QoS) settings to prioritize video conferencing and reduce latency on your own network. But your QoS settings only apply to your own infrastructure, not those of external (customer and vendor) online meeting participants.

For more information, please see video conferencing QoS, on-premise dedicated server options, or contact us for and assistance with installation-specific bandwidth, routing and QoS details.

Audio/Video Equipment, Codecs & Other Technical Questions

Does Nefsis support high definition (HD)?

Nefsis Video Conferencing is high definition (HD) readyYes—Resolutions of 720 and 1080 up to 30 frames per second are supported.

You should use an HD video capture card that is compatible with Windows DirectShow. For general information, please visit HD video conferencing. For technical information and vendor-specific details, please visit Nefsis HD compatible equipment or contact us for assistance with conference room configurations.

What webcams or video devices are supported?

Nefsis is broadly compatible with virtually any webcam or Windows video peripheral.

This includes almost all DirectShow 8.1, or later compatible webcams. In addition, video capture cards with DirectShow 8.1 or later will allow you to use virtually any video input device including conference room pan-tilt-zoom (PTZ) cameras, document cameras, DVD players, specialty devices and so on.

Learn more about video conferencing equipment.

My webcam doesn't appear in Nefsis...what can I do?

Video cameras cannot be shared like a disk drive. The most common problem is the camera is still in use or "held open" by another application. Exit the other application, or "close" the camera and make it available for Nefsis. You can also use the Windows scanner and camera test utility (hit F1 key for Windows Help, or go straight to the Control Panel) to verify your camera is available for other applications.

It is also a good idea to visit the manufacturer's website and download the latest Windows drivers for your camera. If the camera is available, the majority of any remaining problems are out-of-date drivers.

Does Nefsis support multiple monitors for conference rooms?

Yes — Nefsis supports as many monitors as your computer has available. That way you can share on one monitor while watching video on another, which is especially useful for dual-monitor workstations, and in conference rooms, boardrooms, and training facilities.

Can I video conference between the conference room and the desktop?

Yes — Nefsis can work with high quality capture cards, High-def cameras and LCD/Plasma screens in the conference room, and these can seamlessly interact with users at the desktop—share & annotate Powerpoint presentations, conduct instant online meetings, high quality VoIP, all in the best video conferencing service available.

What audio codec does Nefsis use?

Nefsis uses a proprietary audio codec. It should be noted that Nefsis is codec agnostic, and over the last 11 years we have tested and used over 30 audio encoders and decoders, including PCM, GSM, several ITU codecs such as G.711, G.719, and G.722, and many more.

The current version of Nefsis uses a proprietary codec that is specifically designed for full duplex, multipoint VoIP conferencing over variable quality Internet connections. Nefsis broadband audio quality far surpasses the telephone in dynamic range and clarity. Nefsis technology can take hands-free webcam microphone inputs and process them to almost the same level of quality as a headset. As described elsewhere in this FAQ, Nefsis also accepts conference room hardware inputs, taking advantage of ClearOne or any other brand of high-fidelity boardroom equipment. Under most conditions, once an online meeting gets underway, the audio quality is so good most users forget they are meeting "electronically."

What video codec does Nefsis use? How does it compare to H.323?

Nefsis uses MPEG4 for video encoding and decoding, with an option for customers to select H.264. The default MPEG4 codec meets or exceeds H.261, H.263, and H.264 standards with respect to video resolution, color depth, and frame rate. Note that H.261, H.263, and H.264 are the video components of the H.323 specification. Most experts agree that the MPEG4 codec produces the same or better image quality. In addition, the default MPEG4 codec uses less bandwidth.

It should be noted that with Nefsis, video quality is a function of the video input peripheral and available bandwidth. You can get business-grade video conferencing quality with ordinary webcams and existing Internet connections; and boardroom quality video with HD peripherals and T3/DS3 (megabits/seconds) bandwidth. See also below.

Does Nefsis work with H.323 and SIP solutions?

Nefsis does not support H.323 and SIP protocols directly. However, you can still utilize all of your existing video conferencing equipment with Nefsis. See details below, and contact us for the most up-to-date information on direct H.323 and SIP interoperability.

Details ...

Most H.323 and SIP hardware based solutions support some form of presentation, data or content sharing by capturing the display of a nearby PC in a video conference. To conference attendees, the PC display appears just like another video input. Simply use Nefsis on the boardroom PC that would normally be used for data sharing (Internet connection required); this allows any Nefsis user in the conference to share presentations, media and live video in a SIP/H.323 hardware-equipped boardroom.

Another option is to use your existing hardware as video inputs to Nefsis. Because Nefsis is broadly compatible with all audio and video peripherals using standard A/V cables, you will be able to video conference just as you would with your current equipment with the added benefit of mobility for applications such as medical, factory floor, etc.. You'll also have access to powerful web conferencing features that will greatly enhance the utility of your room.

Can I use Nefsis in telemedicine and HIPAA-related environments?

Yes, Nefsis meets the technical safeguards of HIPAA's security rule. Please visit our Nefsis video conferencing & HIPAA page for additional details.

Does Nefsis meet FIPS 140-2 security requirements?

Yes, Nefsis is compliant with U.S. FIPS 140-2 requirements.

Related Pages:
Secure video conferencing — Industry standard security for online meetings
Dedicated Server — An on-premise server option for more security controls
Nefsis Data Sheet (PDF) — General overview of all Nefsis features and systems requirements
Nefsis FIPS Edition Data Sheet (PDF) — Supplementary information on FIPS 140-2 compliance