It is a device capturing and controling all the signals, which are being created by the whole system, especially the made and received phone call signals. The device is mostly used for connecting regular phone system with the Internet and backwards.
The handling of incoming and outgoing phone calls. The incoming calls
are those which you receive from your clients. The outgoing ones – calls to
your clients, suppliers and other contacts. The very service is provided by
special companies, most often by telemarketing call service centres.