System Requirements

Operating Systems

Note: Downloading ISL Light Client or running ISL Light Client Network Start executable will download the latest supported version for your operating system.

Microsoft Windows

Note: ISL Light Client 4.0.5 was the last version to support Microsoft Windows XP, Microsoft Windows Vista and Microsoft Windows Server 2003.

Note: ISL Light Client 3.5.6 was the last version to support Microsoft Windows 2000.

Note: ISL Light Client 3.2.6 for Windows was the last version to support Windows 95, Windows 98, Windows Millennium and Windows NT 4.0.

Mac OS

Important: With macOS 10.14 Mojave Apple and macOS 10.15 Catalina Apple introduced additional changes to its Security settings which further affect the workflow when running ISL Online applications. 

Please refer to the following topic for an explanation: 

• ISL Online programs compatibility with macOS 10.15 Catalina
• ISL Online programs compatibility with macOS 10.14 Mojave
• macOS 10.13 High Sierra

Note: ISL Light 4.4.2031.107 for Mac was the last version to support macOS 10.12 Sierra and below

Note: ISL Light Client 4.0.4 for Mac was the last version to support OS X 10.6 and OS X 10.7.

Note: ISL Light 3.3.2 for Mac was the last version to support OS X 10.5.

Note: ISL Light 3.3.1 for Mac was the last version to support OS X 10.4 and PowerPC Macs.

Linux

• Linux kernel 2.4 and higher (64 bit)
• glibc 2.12 or newer
• systemd
• X Window System

Tested on: 

• Ubuntu 16.04, 18.04, 20.04, 22.04
• Debian 9, 10, 11, 12
• CentOS 8

Not supported:

• Wayland
• Linux 32-bit
• arm64 architecture

Note: Linux systems require X Windows System to run ISL Online's applications.

Note:  ISL Light Client 4.0.4 for Linux was the last version to support 32-bit kernels.

Note: ISL Light Client 3.3.0 for Linux is the first version to support 64-bit Linux operating systems.

Internet Connection

Bandwidth minimum: 56 Kbps

Supported connection methods (ISL Light can work with any of the following):

• direct outgoing TCP/IP connection to TCP port 7615  on ISL Conference Proxy server
• WININET HTTPS connection to TCP port 443 on ISL Conference Proxy server
• WININET HTTP connection to TCP port 80 on ISL Conference Proxy server
• direct HTTPS connection to TCP port 443 on ISL Conference Proxy server
• direct HTTP connection to TCP port 80 on ISL Conference Proxy server

Timeout for a specific connection method is 20 seconds for connection establishment - so total timeout for connection is less than 1 minute.

Supported network types are the following:

• a computer with a static public IP
• a computer with a dynamic public IP
• a computer in a private network behind a firewall with a public IP performing NAT
• a computer in a private network behind a http proxy offering http and/or https protocols

Web Browsers

• Firefox
• Google Chrome
• Microsoft Edge
• Microsoft Internet Explorer
• Opera
• Safari