Updated 06/2015

The Yorktel webcasting platform supports live and on-demand webcast presentations on desktop computers,
laptops, tablets, and mobile devices such as Apple iPhone, iPad and other iOS devices, and on-demand viewing
from Blackberry and Android mobile devices. To successfully participate, your computer or device will require the
ability to view video, play audio, and connect to the Internet, and meet the following minimum requirements:

Microsoft® Windows
• Windows 2008, Windows 7, Windows Vista, Windows XP* (*EOL as of April 8, 2014)
• Internet Explorer® 9.0 or later (including Internet Explorer 10 on Windows 8)
• Windows Media® Player 9.0 or later

Firefox® 3.6 or later, or GoogleTM Chrome
• Windows Media® Player 9.0 or later
• Microsoft Silverlight® 5
• Broadband Internet connection

Apple® Mac® OS
• Apple Mac OS X 10.5.7 or later
• Apple Safari® 5 or later or Firefox 3.6 or later
• Microsoft Silverlight 5
• Broadband Internet connection

Additional Notes
Internet Explorer 9 with Compatibility Mode – We have seen anomalous behavior for some viewers using IE9 with
compatibility mode on. We recommend turning this off whenever possible. IE9 in compatibility mode makes the
browser behave as though it was IE8. Our webcast platform has elements of HTML-5, which are unsupported in IE8.

– If you’re using Microsoft’s Silverlight Players or a browser that uses the Silverlight Plugin (such as
FireFox or Google Chrome), you must have Silverlight version 5.0 or later installed. You can download Silverlight for
free at: http://www.microsoft.com/getsilverlight/Get-Started/Install/Default.aspx

** Recent security updates in Google Chrome and Firefox are causing playback issues for clients using the
Chrome and Firefox browsers. Issue description and solution are below. **

Chrome users receive an error stating that they need to install the Silverlight plugin
in order to view the presentation. However, installation fails to solve the issue.

1: Open the Chrome browser.

2: Type chrome://flags/#enable-npapi in the search bar.

3: Click Enable under the Enable NPAPI entry, and then click Relaunch Now to save the changes.

4: Close all Chrome browsers and reopen, and attempt to view again.

5: If the user receives a message that Silverlight needs permission to run,
they can right-click in the video window and select Run Now.
Alternatively, they can follow the directions immediately below.
If the problem persists, they should try to use a different browser
such as IE or Firefox.

Video does not play when viewing Mediasite content in Chrome or Firefox. When trying to play a
Mediasite presentation in Chrome there is a puzzle piece in the video window:

Firefox displays a warning that fills the browser window:



Click the Plug-in Blocked message in the address bar.

Click on Run all plug-ins this time to temporarily allow Silverlight to run. To permanently allow
Silverlight to run on that site select Always allow plug-ins on [site name] and then click Done.

Click on Activate Silverlight. Alternatively you can go to Settings > Extensions > Plugins, and
select Always Activate for Silverlight.

Internet – Webcasts will look and sound best when viewed over a broadband Internet connection of 750kbps or
greater sustained bandwidth. You can confirm your available bandwidth for free by running the bandwidth test
available at www.speedtest.net

Network Firewall Considerations – Some network administrators block streaming media at the firewall. If you are
unable to view streaming video, you may need to notify your network/IT administrator. The following firewall
ports may need to be opened for proper webcast viewing: TCP/80, TCP/1755, UDP/1755, TCP/554, and UDP/554.
Packet shapers, VPN’s, and/or proxy servers can also cause adverse effects on live streaming. These should be
bypassed if possible. Additionally, streaming may be blocked if firewalls deny the MMS or RTSP protocol. Some
network security policies restrict or filter content based on site URL (this is sometimes referred to as “white listing”
a domain). Some firewalls may also require content to be categorized (uncategorized content is often blocked by
default). Webcast content will be served from yorkcast.com, akamai.net, akamaihd.net, and edgecastcdn.net
domains, so traffic from these domains need to be allowed.

Wireless Card Users – The recommended workflow for any webcast is to use a hardline whenever possible. WiFi
and wireless cards are vulnerable to atmospheric conditions such as interference from radio/microwaves, EM
fields, and other electronic noise. Viewing conditions can change suddenly and without warning even if your signal
is indicating a good connection. That being said, some viewers may have no choice and must use WiFi or wireless
cards. A common viewing issue experienced with wireless cards can be corrected with the following:

To address issue with opening video over Verizon aircard, open up Windows Media Player (independently, not
within IE), open settings box, and make sure the box below is checked.

Please use the following link to test your specific systems’ hardware/software compliance

You can test your system’s audio and video by viewing the following on-demand test webcasts:

Windows Media sample:

Silverlight sample:

You can test your mobile device’s audio and video by viewing the following on-demand test webcast:

Not all webcasts include the option to stream to mobile devices. If your webcast includes mobile streaming, your
device must meet the following minimum requirements:

iPad® requirements
• iPad (any model)
• iOS 4.3 or later
• Apple Mobile SafariTM
• Wi-Fi or cellular data connection (3G or higher)

iPhone®/iPod® requirements
• iPhone 4 or later, iPod Touch 4th generation or later
• iOS 4.3 or later
• Apple Mobile Safari
• Mediasite Mobile app (free download available from the Apple® App Store)
• Wi-Fi connection

AndroidTM (on-demand playback only)
• Android 4.0 or later
• Android browser
• Wi-Fi or cellular data connection (3G or higher)