How does C²Call work?
C²Call does not require any software installation. It is a java based temporary browser applet that is loaded into your browser when you log-in to www.C²Call.com or click on a call-invite link. Since C²Call does not require any installation you can use it anywhere where you have access to the Internet. Essentially you can make web based internet calls now with the same convenience as writing web based emails.

Why can I call talk to anybody on the web and not only to C²Call users?
You can send a call invite-link to anybody you want to talk to. Since C²Call does not require any software installation the receiver of your call invite can call you immediately, even without registration. Of course, you can add any C²Call user to your contact list and talk to him anytime when he is online.

What are the system requirements for C²Call?
Any recent browsers like Internet Explorer 6 and 7, Mozilla Firefox or Safari on Windows Vista/XP, MAC OS-X or Linux. C²Call uses the Java Runtime Environment (JRE) 5.0 or higher that has been preinstalled on almost every PC since Q4/2004. Older PCs can be updated free on www.java.com. The PC must have an Internet connection and mic/speaker or a headset.

Why I’m prompted “please update your Java VM” when loading the applet?
The C²Call applet checks the installed Java Runtime Environment Version (JRE). If the version is too old you will be directed to update your JRE free on www.java.com. (Depending on your OS the JRE could be as well referred to as Java Virtual Machine, Virtual Machine, Java VM, JVM, VM, J2SE).

When loading the applet I’m prompted to trust the certificate issued by Actai Networks GmbH. What is this about?
C²Call needs to access your Microphone/Speaker/headset. Please select “trust” or “always trust”.

C²Call does not start or does not work. What could be wrong?
Ensure that your firewall and anti virus program allow C²Call to load. Set the security settings to “medium” or “low” and check the Java settings. Java script and JRE must be enabled. Then close and restart the browser. C²Call currently does not support calls through an Internet proxy.

Do I need to update C²Call when new features are added?
No, never. C²Call is a temporary applet that is loaded from the Internet with each session. If there is an updated version available you will automatically using it with your next call.

What VoIP technology you are using to connect the calls?
We are using SIP and proprietary technology.

Does C²Call support NAT?
Yes, Network Address Translation is often used by firewalls and routers to allow multiple devices to share a single public IP address.

Does C²Call support STUN and calls through Proxies?
Not yet. Both are not required in most environments. STUN (Simple Traversal of UDP through NATs) is a protocol for assisting devices behind a NAT firewall or router with their packet routing. We will implement STUN and Proxy support later.

Will you support conference calling, video and other advanced features?
Yes, we will introduce more features in the near future.