Configuring Audio Features8293. Enter the minimum delay time for adaptive jitter buffer in the Min Delay field.The valid value ranges from 20 to 300.4. Enter the maximum delay time for adaptive jitter buffer in the Max Delay field.The valid value ranges from 20 to 300.5. Enter the fixed delay time for fixed jitter buffer in the Normal field.The valid value ranges from 20 to 300.6. Click Confirm to accept the change.DTMFDTMF (Dual Tone Multi-frequency), better known as touch-tone, is used for telecommunicationsignaling over analog telephone lines in the voice-frequency band. DTMF is the signal sent fromthe IP phone to the network, which is generated when pressing the IP phone’s keypad during acall. Each key pressed on the IP phone generates one sinusoidal tone of two frequencies. One isgenerated from a high frequency group and the other from a low frequency group.The DTMF keypad is laid out in a 4×4 matrix, with each row representing a low frequency, andeach column representing a high frequency. Pressing a digit key (such as '1') will generate asinusoidal tone for each of two frequencies (697 and 1209 hertz (Hz)).DTMF Keypad Frequencies:1209 Hz 1336 Hz 1477 Hz 1633 Hz697 Hz 1 2 3 A770 Hz 4 5 6 B852 Hz 7 8 9 C941 Hz * 0 # DNote The IP phones will not send DTMF sequence when the call is placed on hold or is held,
