A call shop is a business that provides physical phones for the purpose of making long-distance telephone calls. There are two main types of call shop payment methods; prepaid and postpaid.
Integration of real time products, such as chat, telephony (including IP telephony), video conferences, call control and speech recognition, together with “un-real” time products such as voice mail, SMS messages and Fax. “Unified Communications” is not a standalone product, but a set of products, which present a constant user’s interface among many devices and media types.