Updated 07/2015

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, as well as Android and on-demand viewing from Blackberry and Windows 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)

Firefox® 3.6 or later, or GoogleTM Chrome
• Microsoft Silverlight for Internet Explorer, Firefox® 5
• Adobe Flash for Chrome® 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), 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 Firefox are causing anomalous playback behavior for clients using the
FireFox browser. Description and solution is below. **

Video does not play when viewing Mediasite content in FireFox:

FireFox displays a warning that fills the browser window:


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/443, 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 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

Please use the following link to test your specific systems’ hardware/software compliance
Bandwidth and Plugin Support

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 2 or later
• iOS 6.1 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 6.1 or later
• Apple Mobile Safari
• Mediasite Mobile app (free download available from the Apple® App Store)
• Wi-Fi or cellular data connection (3G or higher)

On-Demand Viewing:
• Android 4.0 or later
• Android browser
• Wi-Fi or cellular data connection (3G or higher)

Live Viewing:
• HLS capable Android running version 4.4.x (KitKat) or later
• Dolphin browser
• Wi-Fi or cellular data connection (3G or higher)

Microsoft Surface and Windows RT tablets (on-demand MP4 playback only)
• Windows 8 or 8.1
• Internet Explorer 10.0 or later
• Wi-Fi or cellular data connection (3G or higher)

Blackberry requirements (on-demand MP4 playback only)
• Blackberry OS 10.0 or later
• PlayBooksT for QNX devices
• Blackberry browser
• Wi-Fi or cellular data connection (3G or higher)