This KB article will help you configure your firewall for use with our hosted call center solution. If you have any questions regarding the information in this document, please contact Support.

Network Configuration

CCA software Domains/IPs

Toronto Clients:

US Clients:

Note: Ping traffic may be blocked. Ping requests to the above IPs may result in timeouts.


The client application uses standard HTTP/HTTPS protocols in order to send user-initiated events (user sign on/off, in-call-status updates, etc). These two protocols typically use TCP over port 80/443 respectively.

In addition, the client application also creates a special TCP connection to our servers in order to receive server-initiated events (status of queues, notifications of calls being transferred, etc). By default, the application uses TCP and port 443 for this purpose (just like HTTPS). Another alternative is to use port 80, or port 57000.

Important: The firewall is not to be opened for incoming traffic. The client application is always connecting to servers in the Telax side (not the other way around). Once the connections are established, the information flows in the two directions as needed.

Special Considerations: Proxy Servers

If a proxy server is deployed within the network, and the firewall only accept requests from the proxy, the client application must comply and connect to the proxy server.

If Internet Explorer is installed, the application will use the settings configured for the browser, making the deployment simpler. Unfortunately, in some cases, there might be necessary to configure the proxy settings manually within the client application.