The client side can be located anywhere either on Linux, Windows or other OS machine because the client-side contains web scripts and files only, such as: Javascript, CSS, images, Flash, HTML etc.
Therefore the client side can be deployed either on Linux server such as apache or nginx or on Windows server using a Microsoft web server product or for example apache for Windows.
Question-answer
For example, if we have a web user on active call, and the user receives an inbound call from a third user.
No, we are not a GSM provider. But we can handle calls to GSM and PSTM numbers and receive inbound calls, if you are using a SIP provider with GSM/PSTN call termination capabilities or if you have a hardware SIP-GSM gateway or a hardware card with sockets for SIM cards and PBX server supporting such hardware.
Flashphoner will communicate with such GSM equipment via SIP and RTP, therefore a GSM call can be established.
We provide open source code for our default web client. Each commit of our code has a build artifact.
So, you can fetch the source code, develop and customize it and compare with our official builds.
Please contact our support to clarify with actual branch.
Current branches:
WC3 – wcs_video
RSGW for Wowza3 – master
RSGW for Wowza4 – rsgw-wz4
If you have a valid WCS license, the license allows unlimited number of connections. However number of simultaneous calls and set of features migtht be limited according to the license plan.

