Patent ID: 8767930
Filing Date: 2014-07-01
Classification: H04M

Abstract:
1. A network interface device, comprising: an I/O unit configured to receive data packets from a packet network; a processing unit in communication with said I/O unit and configured to identify data packets including data representative of DTMF signals; a digital to analog converter in communication with said processing unit and configured to convert the data into analog DTMF tone signals and generate analog DTMF tone signals based on the data, and the processing unit further configured to determine if power of the analog DTMF tone signals is below a threshold value; and a DTMF amplifier in communication with said processing unit and said digital to analog converter, said processing unit causing said DTMF amplifier to amplify the power of the analog DTMF tone signals in response to determining that the power of analog DTMF tone signals is below the threshold value.