The service for determining from which number a client has called. This helps to decide how to answer on the incoming call. A telephone company sends DNIS number to the telephone client’s system during establishing connection. As a rule, DNIS number consists from 4 to 10 digits.
VENTA DE TELEFONIA VOZ IP IDEAL PARA CABINAS, CALL CENTER Y RESIDENCIAS QUE CUENTEN CON EL SERVICIO DE INTERNET BANDA ANCHA
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