Functions of Modem Switching System
To meet the needs of telephone customers, modem switching systems are designed to perform four major functions - Call Processing, Administration, customer service and Maintenance. Call Processing comprises all necessary tasks to connect one telephone to another. These tasks include Supervision while Administration involves monitoring and recording of the system and customer-related conditions. System administration functions include rerouting of network traffic to avoid congestion and reporting traffic data to measure telephone patterns at certain times or areas of network. Customer-related features include recording information about toll calls for billing purposes.
Maintenance involves detection and correction of trouble in the switching system to insure reliable and efficient operation. Maintenance functions include automatic detection and isolation of a problem and, in some cases, location of the trouble while customer service involves the additional features that expand a customer’s telephone service, and are provided by most modern switching system. These features include call-forwarding, conference calls, speed dialing, directory assistance, and special business services, such as Centrex.
Signaling is the common language by which switching machines communicate. In addition to transmitting information, telephone networks also transmit control signals. These signals are transmitted between network control devices, which enable them to set up, disconnect and control the transmissions. Many such supervisory signals are needed to set up a call through a complex network.
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