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What is an IMUX and why might it be necessary?

All Polycom video products are inherently capable of connecting to an IP network. But some older videoconference models and some organizations do not utilize IP connectivity.

Polycom, the leader in the video conferencing marketplace, released the Polycom Viewstation and Polycom VSX products for many videoconference applications. What follows is an explanation of how to utilize a domestic ISDN connection with your Polycom video unit.

All Polycom video products are inherently capable of connecting to an IP network. But some older videoconference models and some organizations do not utilize IP connectivity. If this description applies to you or your partners, then the purchase of ISDN equipment is essential. Polycom uses a Quad BRI or PRI module for ISDN.

ISDN is a data circuit obtained from the local phone service. Many organizations prefer ISDN networks because of the ability to establish a point-to-point digital connection between the two-sites, which ensures flawless connectivity. This certainty is not always possible with IP networks.

An ISDN digital phone line can be purchased in 128Kbps per phone line as BRI service, or as a full PRI, which is 23 channels of ISDN. PRI is similar to a T1, but is designed as a voice data phone circuit.

To interface with this network, Polycom video products utilize the Quad BRI IMUX module. This unit supports four 128Kbps BRI ISDN lines, and is the most common module is use with Polycom video products.

There are different types of ISDN module depending upon the particular Polycom video product being used. We will begin with the module selections for the Polycom Viewstation lineup, which is the first generation of videoconference products.

All IMUX modules for use with the Polycom Viewstation line are actually the same module. The Viewstation EX, FX and VS4000 use a specialized connector that connects these products. While using same IMUX module, the connector is proprietary. This makes it vital that the correct cable is being used! One end of the connecting cable is blue (this plugs into the Polycom ViewStation EX, FX or VS4000); the other connector is green and connects to the IMUX module.

The Polycom Viewstation SP, Viewstation H.323, Viewstation 512, and Viewstation 512 MP use a cable where both connectors are green, its appearance is similar to a standard Ethernet cable.

With the newer Polycom VSX videoconference products, every Polycom VSX unit uses a specific Quad BRI IMUX, as opposed to the interoperability of the IMUX modules designed for the Polycom Viewstation product line.

The Polycom VSX 5000 uses a specific Quad BRI IMUX module. The Polycom VSX 7000 and VSX 7000s can share the same Quad BRI IMUX module. The rack-mounted Polycom VSX 7000e and Polycom VSX 8000 can also utilize the same Quad BRI IMUX module.

This information should enable you select the correct IMUX module to use with your Polycom video system.

Which display unit is appropriate for video conferencing

CRT, LCD, DLP, etc – which type of display can or should be used in conjunction with a Polycom video product

Polycom, the leader in the video conferencing marketplace, released the Polycom Viewstation and Polycom VSX products for business, educational and other video conference applications. But which type of display can or should be used in conjunction with a Polycom video product?

The cathode ray tube (CRT) display is by far the most commonly available around the world. However, they are slowly being replaced by newer technologies. CRT displays are fairly inexpensive, but can only be used for videoconference display – they are incapable of displaying shared computer content during a call.

Most CRT displays support a standard definition aspect ratio (4:3) and use composite and S-Video connections to interface with Polycom video products. All Polycom Viewstation and Polycom VSX models support these connections – insuring the compatibility of a CRT display for video conferencing use.

LCD displays and Plasma screens have become more commonplace in many videoconference environments. LCD displays and Plasma screens support enhanced features and high-definition resolution. These displays are ideally combined with the newer Polycom VSX 5000, VSX 7000s, VSX 7000e and VSX 8000 units.

All of the Polycom VSX video products have a built-in VGA connection to be used with the primary monitor. This will allow for videoconference participants and/or shared computer content to be displayed on the same monitor. These displays are small, compact, and are ideal for use with your Polycom video product.

Projectors are also commonly found in many conference rooms, because of their use for computer presentations. A DLP projector can be utilized because of its support of S-Video, Composite, and VGA connections. These allow for the display of video conference participants in addition to shared computer content.. Projectors are compact and can produce a large display when used with a screen.

This should provide some background information when determining which type of display to incorporate into your organizations video conferencing environment.

Some things to consider before your audio or video conference

There are several preparations to make before conducting an audio conference or video conference call.

Polycom, the leader in the audio conference and video conference marketplace, released the Polycom SoundStation, Polycom ViewStation and Polycom VSX products for various conference applications. There are several preparations to make before conducting an audio conference or video conference call.

The conference room configuration will determine how you and the other participants appear on camera. The integrated cameras on Polycom video systems are more than adequate to provide excellent video quality, but will the conference room unintentionally negate it. Be sure to provide adequate room lighting. Also, make sure that blinds are drawn over any outside windows. After these preparations have been made, turn on the Polycom video unit and look at yourself through it. Do this by hitting the “near” button on the Polycom remote, and then adjusting the camera with the “arrow” keys to the desired position.

Another issue to consider before placing a video conference call with the Polycom video product - make sure the room is clear of any excessive ambient noise. Be certain that microphones are not placed near ventilation ducts or other constant noise sources. It would be counterproductive broadcast to the far-site every pop, hiss or whirr from the conference room. Additionally, do not place the microphones too close to any speakers. If it picks sound coming from the far-site, this will cause a feedback loop. The loud sound it produces is neither good for the Polycom video system nor yourself!

Lastly, determine that your location has at least 384 Kbps of synchronous bandwidth to ensure a successful video conference call. Check with the IT department in your organizations to be sure that sufficient bandwidth is available for the video conference call.

The preparation for a Polycom audio conference system is much easier by comparison to video conference calls. Make sure the Polycom SoundStation unit will cover the room area and the amount of participants using the product. If using the system in a large room, extension microphones can be added to most audio conference devices to expand the coverage area – there should be no reason for someone to yell to be heard. As with the Polycom video conferencing system, take precautions to eliminate any unwanted ambient noise in the background.

Enjoy the audio conference or video conference experience!

Addressing some common video conferencing issues

Polycom video products are great technical solutions addressing your organizations video conferencing need, but logistical issues need to be addressed by a human being.

Polycom, the leader in the video conferencing marketplace released the Polycom ViewStation and Polycom VSX products for various videoconference applications. Even if you are versed in other technologies, you may not be aware of some day-to-day usage issues that may arise with the Polycom video system.

One common example is having someone walk into the middle of a videoconference call. This may come from a lack of awareness of the technology or unfamiliarity with the video conferencing schedule. Proper planning and organization will go a long way in preventing different groups of users in an organization from accidentally imposing on each other’s videoconference.

Polycom video products are great technical solutions addressing your organizations video conferencing need, but logistical issues need to be addressed by a human being. Help is available for IT professionals to prevent scheduling conflicts from growing into a large problem for your organization.

The Polycom’s SE-200 ReadImanager is a good place to begin. The Polycom SE-200 product provides multiple solutions that can be integrated into a simple hardware based rack-mount unit. This will work in conjunction with all of the available Polycom video conferencing end-points.

The Polycom SE-200 ReadImanager provides GMS (global management system) software for handling Polycom video product settings on each device on the network. The Polycom SE-200 also provides an integrated gatekeeper to direct video conference calls between certain hardware MCU’s or ISDN gateways inside or outside the organization’s videoconference network.

Finally, the Polycom SE-200 ReadImanager offers a scheduling tool for videoconference meetings. The calls can be scheduled manually, or handled via the Microsoft Outlook scheduling tool – this is highly recommended. Automating the scheduling process is simple, effective and frees the IT department to deal with more pressing concerns. The end users are empowered to schedule their own calls with the remote sites a software based calendar tool, and other individuals won’t need to be consulted on this issue.

An introduction to the Polycom V500

The Polycom V500 is the latest entry-level product; it follows the Polycom Viewstation series.

Polycom, the leader in the video conferencing marketplace, has released numerous systems for various videoconference applications. The Polycom V500 is the latest entry-level product; it follows the Polycom Viewstation

series.

The Polycom V500 is capable of 584 Kbps connection speeds via an IP network and 128 Kbps via ISDN, but only with the Polycom V500 BRI model. The reduced bandwidth capacity via ISDN is designed for regions without reliable broadband Internet access. When the cost of an ISDN recurring line-charge and long distance toll rates are considered – the selection of this system is easy to understand.

It is worth nothing that a separate ISDN module cannot be purchased apart from the Polycom V500. It must be bought specifically as an included feature in the Polycom V500 BRI model, or not at all.

The Polycom V500 utilized the same graphical interface as the Polycom VSX. The Polycom V500 is designed for use by one or two people and requires a display unit that supports composite video and audio connections. The microphone and camera are integrated into the design of the Polycom V500. The Polycom V500 is designed to sit on top of a display monitor.

The Polycom V500 is ideal for home or single office use. It is a good unit for a small video conferencing environment and an organization with limited financial means.

An introduction to the Polycom VSX 5000

The Polycom VSX 5000 as an entry-level set-top product in the Polycom video product line.

Polycom, the video conferencing leader, released the Polycom VSX 5000 as an entry-level set-top product in the Polycom video product line. The Polycom VSX 5000 is an emerging platform for users familiar with Polycom video products.

With a list price significantly less than other Polycom VSX products, the Polycom VSX 5000, was a considerable value to purchase. The Polycom VSX 5000 has a connection speed of 768Kbps via IP and 512Kbps on an ISDN connection with the addition of a separate Quad BRI IMUX module.

Before purchasing the Polycom VSX 5000 for your videoconference environment, consider the room size and the number of participants. The camera is designed to provide coverage of three to five individuals. The built-in camera is stationary, but the lens pans twenty degrees to the left and right, and can tilt ten degrees up and down. The camera can be rotated manually to focus on your speaker or subject.

The VSX 5000 does not support multi-point functionality, and can only be used for point-to-point connections. An additional site must act as host for multi-point video conferencing sessions.

A particular feature to note is the Polycom VSX 5000 ability to use a single monitor with a VGA connection. This allows for the connection of VGA PC content, and videoconference with dual monitor emulation,. A display for content and a display for people - an ideal system for a single, large LCD screen.

For an organization on a budget, with a small videoconference area, the Polycom VSX 5000 is a good product that will offer years of quality service.

Comparing the Polycom Voicestation 100, Voicestation 300 and Voicestation 500

The Polycom Voicestation product line incorporates full-duplex technology into its system. This is opposed to an audio conference call attempted via a standard handset phone.

The existence of Polycom began with the introduction of the Polycom SoundStation in 1989. This product was a marvel of the audio conference revolution, and focused on the need for increased productivity without the hassle or expense of travel. Later, the company released a scaled-down version of the Polycom audio technology, and marketed it as the Polycom Voicestation series.

The Polycom Voicestation product line incorporates full-duplex technology into its system. This is opposed to an audio conference call attempted via a standard handset phone. On a traditional set-up, both parties are going to be asking the same questions repeatedly – which devolves into a redundant waste of time.

Full-duplex technology provides the ability for both connected sides to talk simultaneously in an audio conference, which eliminated repetition and also allowed for easier discussions, as both groups would not have hesitate, waiting for response and becoming frustrated.

The Polycom VoiceStation 100 was the entry-level Voicestation product released. It was designed for two to three people in a small conference room or for a single user at their desk. The product is currently being phased out.

The Polycom VoiceStation 300 is also designed for a small conference room or single-user environment. It has a 360-degree pickup and a range of about seven feet from the unit. The VoiceStation 300 also supports DNR (Dynamic Noise Reduction technology) which eliminates excessive background noise.

The Polycom VoiceStation 500 has identical product specifications as the VoiceStation 300, but it is a Bluetooth-enabled device. This means the Polycom VoiceStation 500 can interface with a mobile phone for a hands-free phone conversation. It can also be connected to a computer and used in an audio conference with any online service that transmits voice over the Internet.

Polycom VoiceStation products are an economical entry into the world of Polycom audio, and will get your organization on the path to productivity and success.

Comparing the Polycom Soundstation, Soundstation Premier and Soundstation 2

The Polycom SoundStation was the first full-duplex speakerphone available for an audio conference environment. It provided echo canceling and 360-degree microphone pickup.

Polycom has been the world leader in the “full-duplex” speakerphone market since 1989, and by far offers a superior conference room solution.

It began with the release of the Polycom SoundStation and to this date, no competitor can even come close. With a unique triangular shape, it’s futuristic look made it a speakerphone product ahead of its time.

The Polycom SoundStation was the first full-duplex speakerphone available for an audio conference environment. It provided echo canceling and 360-degree microphone pickup. This allowed someone to speak while an audio conference participant on the far-site was talking - without a break or pause in the conversation. Four to six audio conference participants is a good number for the Polycom SoundStation.

“You mean I could actually interrupt someone during conversation with a speaker phone without listening to their rant?” This in fact, was a major selling point for the Polycom audio product line.

After Polycom’s initial foray into the audio conference market, Polycom released the SoundStation Premier, a higher-end product for a larger audio conference setting.

The Polycom SoundStation Premier features a greater coverage area designed for a larger audio conference room, and introduced auto-switching mics. The SoundStation Premier had three microphones, which could be switched off and on depending upon the direction of the sound in the room – following the current speaker. With the other microphones switched off, background noise was reduced - leading to clearer and improved sound quality. The SoundStation Premier was designed for an executive professional office, and was a better fit for the higher requirements of their corporate customers. The SoundStation Premier can ideally handle ten to twelve audio conference participants.

Nearly fifteen years later, the Polycom SoundStation 2 product was released. The Polycom SoundStation 2 addressed many of the technical issues of it’s predecessor. A display window was added to support caller ID, as well as phone book, to enter frequently dialed far-sites. Polycom claimed that the SoundStation 2 microphones were fifty percent better at detecting conversation and sound; this is about equivalent to the SoundStation Premier.

All Polycom audio conference phones offer EX models, which allows for the addition of two external microphones to be added which increases the room coverage area. Refurbished Polycom SoundStations are a great entry-level product for new audio conference users. But if your budget allows, the Polycom SoundStation 2 is great choice to fully maximize your conference room and increase your company’s productivity.

An introduction to the Polycom VSX 3000

The Polycom VSX 3000 is a self-contain system with an included 17-inch LCD screen. Designed for use in a small office, it also comes with built-in speakers and a built-in camera.

Polycom is the leader in the videoconference marketplace, but lacked a high-end desktop presence. Polycom released the Polycom VSX 3000 to compete in this arena for a specific video conferencing use. The Polycom VSX 3000 platform took some time to become established for as Tandberg and Sony had previously existing systems.

The Polycom VSX 3000 supported 2Mbps via an IP connection and 512Kbps via ISDN; it was available in two different configurations. The ViewStation VSX 3000 also supports dual-monitor emulation, which allowed for a split display – showing the near and far sites on a single monitor.

The Polycom VSX 3000 is a self-contain system with an included 17-inch LCD screen. Designed for use in a small office, it also comes with built-in speakers and a built-in camera. This system could be taken right out of the box; placed upon a desk; and a videoconference call could be begun in a matter of minutes.

When considering what model to purchase, the Polycom VSX 3000 is available in two different configurations, one is only designed for IP-networks, and the other, a Quad BRI version, supports IP and ISDN. For a little more money, you get the additional flexibility to utilize IP and ISDN with the Quad BRI version.

The VSX 3000 is ideally suited to sit on a high-level executive’s desk or for use in the home office of a telecommuter. It delivers privacy for your video conferencing in a small, intimate setting and is the system of choice for long-distance private meetings when travel is not an option.

In addition to the standard features, the Polycom small office unit had two available options. Polycom’s “People+Conent” could be added, but will only function via an IP network. This would allow you to use Polycom’s software client to send PC data via the VSX 3000.

For larger video conferencing needs, the ability to conduct a four-site multi-point (including yourself as the host) could be added to the VSX 3000. This allows for a total of four simultaneous connections during one-call, with the VSX 3000 serving as the host site. Be aware that a T1 data connection is necessary for the bandwidth capability to achieve this. Also, four-site multi-point at 30-frames-per-second is only available with an IP connection, and not via ISDN at this quality. Multi-point functionality with four total sites is possible with the VSX 3000 Quad BRI model, but at a transfer rate of only 128Kbps, the transmission is limited to 15-frames-per second.

The VSX 3000 is an ideal Polycom video desktop system to choose for a single participant who needs an intimate setting to conduct their videoconference.

An introduction to the Polycom Viewstation EX

The Polycom Viewstation EX appeared about the same time as Viewstation FX.

Polycom, the leader in the video conferencing marketplace, released the Polycom ViewStation EX as a product upgrade – but it lacked sufficient publicity. The Polycom ViewStation H.323 platform was already well established in the market, but the ViewStation EX had many more available features.

The Polycom ViewStation EX appeared about the same time as ViewStation FX. The Polycom ViewStation EX supports 2Mbps via an IP connection and 512Kbps via ISDN with an optional QUAD BRI IMUX interface.

The Polycom ViewStation EX offered increased maximum dialing speeds, and also supported a letterbox aspect ratio (16:9) when calls were placed at a 512Kbps connection speed between other Polycom Viewstation EX, Viewstation FX, and Polycom VS4000 products.

An advantage of the Polycom ViewStation EX for use as a videoconference solution was the built-in VGA output, which was not previously available. This meant that received computer content in a Polycom video call, could be presented in its original resolution, provided that there was a VGA monitor to display it. However, a dual monitor setup was necessary to achieve this, as it was not possible in a single monitor environment.

In addition, an optional device exists called the “Visual Concert FX” which allows computer content to be shared in a video conferencing call. Simply connect a laptop or desktop computer to the Visual Concert FX, press the play button, and begin sharing PC data in a videoconference call with this Polycom video product.

Also, the Polycom ViewStation EX could be upgraded to a four-site multi-point capability. With all these advantages, the ViewStation EX is Polycom’s best-kept secret for company or organization’s videoconference environment.

An introduction to the Polycom Viewstation MP

Polycom introduced the Polycom ViewStation MP as a versatile product to accommodate both IP and ISDN network environments.

Polycom introduced the Polycom ViewStation MP as a versatile product to accommodate both IP and ISDN network environments. The ViewStation MP was one of the most flexible ViewStation products before upgrading to a ViewStation EX or ViewStation FX model.

The Polycom ViewStation MP offered 768Kbps maximum IP connectivity, and 512Kbps speeds via an ISDN network, it is also capable of 30-frames-per-second of video via ISDN. This was an improved ISDN capability as compared to the Polycom ViewStation 128, which only offered a 15-frames-per-second transmission rate.

Choosing the right Polycom video product for your video conferencing network can be a daunting task. Before making a decision about which Polycom video product to purchase, consider the features that may meet your requirements:

Is there a need for 512 Kbps capability via ISDN, or the possibility to expand and use multi-point via ISDN in future videoconference situations? If only a single, point-to-point video conferencing scenario is anticipated, then the Polycom ViewStation MP at 512 Kbps via ISDN, with 30-frames-per-second television-quality-video is a good choice. Most users of this equipment utilize a 384Kbps connection via ISDN, and three lines. This is the minimum requirement needed for television-quality video, and the way many systems are used.

Organizations that required all four ISDN lines, or 512Kbps of ISDN bandwidth were situations that needed to utilize multi-point. If your corporation only has an ISDN network as opposed to IP, then the multi-point function would be a good option for your organization. Consider purchasing the Polycom ViewStation MP as a more sensible choice.

The ViewStation MP was an economical entry-level product for IP connections, and as an entry into the ISDN multi-point market. The multi-point function works at 128Kbps per connection via IP if all 4-Sites were simultaneously connected - meaning only 15-frames-per-second video quality, which may be a sufficient entry into the video conference market.

An introduction to the Polycom Viewstation 512

Polycom introduced the Polycom ViewStation 512 as a versatile product to accommodate both IP and ISDN network environments.

Polycom introduced the Polycom ViewStation 512 as a versatile product to accommodate both IP and ISDN network environments. The ViewStation 512 is a flexible system, and held the spot between its predecessors and the Polycom ViewStation EX and ViewStation FX models. So the ViewStation 512 was a good Polycom video product for many environments.

The Polycom ViewStation 512 offered 768Kbps maximum IP connectivity, and 512Kbps speeds via an ISDN network, it is also capable of 30-frames-per-second of video via ISDN. This was an improved ISDN capability as compared to the Polycom ViewStation 128, which only offered a 15-frames-per-second transmission rate.

Is there a need for 512Kbps capability via ISDN, or the possibility to expand and use multi-point via ISDN in future videoconference situations? If only a single, point-to-point video conferencing scenario is anticipated, then the Polycom ViewStation 512 at 512Kbps via ISDN, with 30-frames-per-second television-quality-video is a good choice. Most users of this equipment utilize a 384Kbps connection via ISDN, and three lines. This is the minimum requirement needed for television-quality video, and the way many systems are used.

The ViewStation 512 was an economical entry-level product for IP connections, and as an entry into the ISDN multi-point market. The multi-point function was limited to 128Kbps per connection via IP if all 4-Sites were simultaneously connected - meaning only 15-frames-per-second video quality, which is not the same as television-quality video, but is a good entry into the video conference market.

An introduction to the Polycom Viewstation H.323

The Polycom ViewStation H.323 system was a popularly deployed unit – because of the ability to add optional features as needed.

Polycom, a leader in the video conferencing marketplace, released the Polycom ViewStation H.323 as its main-stream product. The Polycom ViewStation H.323 platform was well established in the industry. This model was an affordable product that inherently cam with the most features for any videoconference applications.

The Polycom ViewStation H.323 offers 768Kbps maximum dialing speeds via IP connections and 512Kbps via ISDN with the purchase of an optional Quad BRI IMUX unit. This ISDN capability was a great improvement over the Polycom ViewStation 128, and was capable of 30-frames-per-second video via ISDN. Comparatively, the ViewStation 128 offered 15-Frames-per-second over comparable connection speeds. In essence, the Polycom ViewStation H.323 was like a ViewStation 512 with the Quad BRI IMUX module addition.

Before purchasing the Polycom ViewStation H.323 consider: is 512Kbps capability via ISDN desired, or may you eventually need the ability to conduct multi-point videoconferences via ISDN? For example, it is possible to do one videoconference with the Polycom ViewStation H.323 at 768Kbps via an IP connection, which is comparable to television quality-video at 30-frames-per-second. Most buyers of this equipment only use 384Kbps via an IP connection. This is the minimum requirement for television-quality video and many connection lines offer it.

The ViewStation H.323 was meant to be an IP-only system, but it could be upgraded to use 512Kbps via an ISDN connection. The ViewStation H.323 could even be upgraded to conduct four-site multi-point calls, but only with the addition of the Quad BRI IMUX, and access to an ISDN connection.

The ViewStation H.323 system was a popularly deployed unit – because of the ability to add optional features as needed. This versatile system was ideal for value conscious customers that might later consider additional enhancements.

An introduction to the Polycom Viewstation 128

The Polycom ViewStation 128 was released as a near-entry level product.

Polycom has released a plethora of video conference products, one of which is the Polycom ViewStation 128. The ViewStation 128 is an excellent product to choose depending upon your Polycom video need.

The Polycom ViewStation 128 was released as a near-entry level product. It is most popular in developing regions of the world; in particular the Pacific Rim area. It is attractive because of its cost and the ability to use single 128Kbps ISDN line.

The Polycom ViewStation 128 features a maximum 768Kpbs dialing speeds via IP and, as the name implies, 128Kbps via ISDN. The lesser ISDN bandwidth capability should be taken into account when considering the ViewStation 128 model. It is an ideal solution for developing regions outside of North America as many countries lack reliable broadband connections. This makes the 128Kbps ISDN capability a perfect choice for these areas, especially when considering the cost of one ISDN line’s recurring charges and long distance toll rates.

Polycom video products for this market were ideal - the relatively low initial purchase cost meant you could begin to experience video conferencing for a minimal investment. The ViewStation 128 supports a voice-tracking camera, offers a simple address book system, and possesses the easy-to-use GUI interface.

This is a real value, considering these are the same features found on the more expensive PolycomViewStation H.323 model.

Polycom, sold more of the easy-to-use ViewStation 128 products in regions with low-cost operation requirements and varying connection options. The ViewStation 128 can be easily converted to IP, once broadband connections become available. This insured that your investment would be future-proofed in coming years as connections options in various regions of the world changed.

The cause and effect of delays on a videoconference call

When considering video conferencing products for use via an IP network, it must be determined that adequate bandwidth is available for a call.

Polycom, the leader in the video conferencing marketplace released the Polycom ViewStation and Polycom VSX product for various applications. Certain factors may cause delays in a Polycom video call in the form of frame breaks and possibly audio loss.

When Polycom video products were released, they were all designed to utilize the standard H.323 protocol via IP and H.320 protocol for an ISDN connection. ISDN networks offer a digital point-to-point connection using a digital phone circuit, and usually do not encounter packet or frame loss during a video conference call. More emphasis will be placed on IP connections, as they usually require more attention.

When considering video conferencing products for use via an IP network, it must be determined that adequate bandwidth is available for a call. For point-to-point calls, a 384 Kbps per site is required, and it needs to be synchronous. This means that both sites must be capable of sending and receiving a call equally. The standard of 384 Kbps is necessary during a videoconference transmission for thirty-frames-per-second television quality video. This transmission rate is the same for an ISDN connection, as well.

The biggest detractor to a videoconference call is a lack of sufficient bandwidth. Make sure the available data circuit, whether it is the public Internet or a private network, is not at capacity before beginning the videoconference call.

It is recommended that an organization have DSL or cable modem service on-site and dedicated to for their video conferencing systems. This line should be separate from the data network, to prevent them from competing for available bandwidth. Ensuring a quality video conference call is worth the additional cost incurred by utilizing a commercial grade DSL or cable modem connection.

If a public Internet connection is being used for a videoconference, it is suggested to assign a static IP address to the Polycom video product. This ensures that the NAT on the network will not need to be transversed, which can cause connection problems for users attempting to call your organization’s device. If a Polycom video product must be placed behind a NAT, the port ranges will need to be configured for forwarding. This process is described in the Polycom users’ manual.

Finally, make sure that low latency is under 100ms during the videoconference connection; this should eliminate packet and frame loss during a call. Knowing the basic requirements for a video conference call, and adhering to them will ensure a productive and successful video conferencing call for your organization.

An introduction to the Polycom VS 4000

Polycom designed the VS 4000 to be flexible enough for all types of applications and circumstances. Integrators soon realized that the Polycom VS4000 was ideally suited for business that wanted a quality Polycom video conferencing product.

Polycom, the leader in the video conferencing marketplace, had much success with the Polycom Viewstation FX model. They followed its release with the Polycom VS 4000, which was essentially the same hardware packaged as a rack-mount system. The Polycom VS 4000 had virtually the same features as the Viewstation FX, but was packaged in a different form factor, ideal for custom integration.

The Polycom VS4000 was designed to be used in a standard 19-inch IT rack, and acted as a data center, or in a conference room - hidden away in a customized configuration. System integrators maintaining a grand videoconference environment for a large corporation took advantage of the Polycom VS4000 ability to easily connect to a Crestron Electronic system. Crestron designs custom touch-screen panels that can be programmed to raise curtains, control lighting, and utilize the Polycom VS4000 from a single control panel.

Polycom designed this video conferencing product to be flexible enough for all types of applications and circumstances. Integrators soon realized that the Polycom VS4000 was ideally suited for business that wanted a quality Polycom video conferencing product and wanted had previously installed a Crestron Electronic system.

Consider that a separate external camera is necessary, as this is just the coding/decoding device (CODEC). This makes the use of this system more involved, but ideal for a custom integrations situation where cables and connections can be placed out of view.

In addition to the ease-of-integration, the Polycom VS4000 was a great product offering that featured support for 2Mbps IP dialing and additional ISDN/PRI capability. Connection speeds of 512Kbps via an ISDN line were possible with an additional Quad BRI IMUX module.

The Polycom VS4000 also supports four-site multi-point functionality, meaning the three sites, plus the host, could be connected for a simultaneous video conferencing. The Polycom VS 4000 could also handle calls originating from IP or ISDN networks. This means the Polycom VS 4000 can function as a gateway bridge between different types of networks – saving the expense and hassle of a separate bridging product.

Comparing the Sony EVI D-10 and Sony EVI D-30 cameras for Polycom

The Sony EVI-D30 camera was the first-generation of Pan/Tilt/Zoom camera offered by Sony, and was considered a reliable, high-quality camera. The Sony EVI-D30 and EVI-D10 cameras were available for purchase to use in stand-alone applications.

Polycom, the leader in the video conferencing marketplace, released the Polycom Viewstation and Polycom VSX products with integrated Pan/Tilt/Zoom cameras, designed by Sony. The Polycom ViewStation videoconference products offered two different Sony cameras: the EVI-D10 and EVI-D30. There are some significant differences between these two models.

Polycom manufactured quality video conferencing units, but lacked the resources to build their own cameras, unlike some of their competitors. They partnered with Sony – a good product on the market, and packaged these cameras with their Polycom video products.

There are some differences between these two models: The Sony EVI-D30 uses a mechanical drive system to move the camera and EVI-D10 uses an electromagnetic system. The gear system employed by the Sony EVI-D30 camera causes its panning motion to be more systematic, as it passes by each notch. This may be noticeable by some users. The Sony EVI-D10 electromagnetic system is designed to be more precise - moving pixel by pixel and its panning motion should be less noticeable.

The Sony EVI-D30 offered a 12x zoom camera, and for larger rooms an aftermarket wide-angle lens was an available option to attach to the camera. The Sony EVI-D10 was designed with an 18x zoom capability and was manufactured with a built-in wide-angle lens. This offers a much wider field of view – and thus a wider coverage area. This functionality is a great advantage if there is a need to cover a large conference room or large group of videoconference participants.

An introduction to Polycom PVX software

Polycom originally released the Polycom Via Video and Polycom Via Video II units for desktop videoconference use. The Polycom designed camera came with software the supported the H.323 protocol.

Polycom, the leader in the video conferencing marketplace, released the Polycom ViewStation and Polycom VSX products for various videoconference applications. After many years of Polycom producing hardware components for video conferencing, the company released a software-based solution designed for use with a computer. This new product is the Polycom PVX.

Polycom originally released the Polycom Via Video and Polycom Via Video II units for desktop videoconference use. The Polycom designed camera came with software the supported the H.323 protocol. The main advantage was that the Via Video camera had its own on-board Codec and did not rely on the computer for processing the audio or video signals. This was ideal in the early days of computing, with slow processors, but given the speed of modern computer systems, the need for a separate Codec is less significant.

The Polycom PVX is a software client that utilizes an independent USB camera with an integrated microphone. This software version makes the Polycom PVX compatible with the Polycom VSX product line. The Polycom PVX is H.323 and SIP compliant; meaning that it can interface with any Polycom product, many competitors’ systems or other compliant videoconference device.

This Polycom video unit is capable of thirty-frames-per-second – or the equivalent to television-quality video. The Polycom PVX is also compatible with the H.239 standard for computer content sharing. The software comes with a NAT auto-detect-feature, but problems may still occur. If utilizing it in a high-security environment, it might be wise to check the settings beforehand as it cannot transverse a NAT in all situations.

The Polycom PVX is ideal for business travelers, but would suit a small office as well. The Polycom PVX client can function in any environment you may find yourself in.

An intro to high-definition Polycom HDX systems

Polycom competitors, LifeSize and Tandberg, already have released high definition video conferencing systems. Polycom moved to deploy their product, so as not to yield the market position that they have possessed for some time.

Polycom, the leader in the video conferencing marketplace previously released the Polycom ViewStation and Polycom VSX products for various applications. Most recently, Polycom released a high definition video conferencing product line, the Polycom HDX.

Polycom initially stated that the VSX 8000 product line would be capable of upgrading to high definition with an additional software purchase. Shortly there after, the Polycom HDX series appeared on the market. So the Polycom VSX 8000 will need to be replaced with new equipment. No other Polycom VSX system was even considered high definition capable. To experience the next level in video conferencing, the purchase of a Polycom HDX product will be necessary.

Many requirements are necessary to place a high definition video conference calls with the Polycom HDX product. One megabyte per second transmission is required for a point-to-point high definition video conference call, and two megabytes per second will be required if a computer is connected to share content via HD video conference.

A high definition camera will also be required to use in conjunction with the Polycom HDX rack-mount Codec. Polycom offers the Polycom Eagle Eye camera, and is probably the best camera solution to utilize. Other HD cameras may not be compatible. For a similar price, the best investment would be a camera that is certainly compatible with the Polycom HDX unit.

If your organization has a large budget and bandwidth to spare, then a Polycom HDX high definition system will not disappoint.

Comparing PAL and NTSC video conference formats

Two of the world’s most widely used video formats are NTSC (National Television Standards Committee) and PAL (Phase Alternating Line).

Polycom, a video conferencing technology leader, markets its products for domestic and international usage. If a product was purchased regionally, then it is likely that the correct system will be employed with considerations for compatibility. Two of the world’s most widely used video formats are NTSC (National Television Standards Committee) and PAL (Phase Alternating Line). They will be described briefly in order to provide an understanding about what requirements must be met in order to conduct a successful videoconference.

The Polycom name is used primarily for the models that utilize the NTSC standard. This includes North America, Central America, parts of South America and some Asian countries. Domestically, theses are most commonly referred to as Polycom.

Products marketed in other parts of the world receive the Polyspan naming convention to differentiate between the two product lines. Regions that utilize the PAL standard for video include most of western Europe, portions of South America, most of Africa, many Asian countries and Australia.

Another format (SECAM) is used in parts of Africa, most of eastern Europe and some Asian nations, but that issue is not addressed as part of this discussion.

All of these formats are standards for determining how the resolution of the display will be configured. Someday, when all systems are HD compatible, this issue will no longer be a concern. Until then, the different formats need to be considered when dealing with broadcast and display technology.

In addition to the broadcast formats, when using this technology in different countries, their varying power sources should also be taken into consideration.

When purchasing a Polycom video product designed for domestic use, be sure that the display supports the NTSC format - most newer LCD and Plasmas are capable of this. If a display does not support NTSC, then an additional converter will need to be purchased for that region. This may also be a concern for companies that have international offices, or send representatives abroad to communicate with a home office.

Take all of these issues into consideration before purchasing or using a video conferencing system in your office, or if you plan on traveling abroad.

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