| Configuring the Audio Settings | 136Selecting an H.265 ModeYou can select VBR or CBR for the H.265 video codec according to your network bandwidth. It is onlyapplicable to VC200 endpoint.Procedure1. On your web user interface, go to Account > Codec > Video Codec.2. Configure and save the following settings:Parameter Description Configuration MethodH.265 Mode H.265 video codec.• VBR- the output data rate ofthe H.265 codec varies pertime segment. You can savenearly half of the bandwidth.• CBR- the output data rate ofthe H.265 codec is constant.If the latency issue appearsin the call or video image isabnormal, it may result frompacket loss, you can selectthis value to try to fix thisissue.Default: VBR.Web user interfaceDTMFDTMF is the signal sent from the system to the network, which is generated when pressing the keypadduring a call. Each key pressed generates one sinusoidal tone of two frequencies. One is generated from ahigh frequency group and the other from a low frequency group.• DTMF Keypad• Transmission Ways of DTMF• Setting DTMF Transmission Method for SIP Protocol• Configuring DTMF for H.323 ProtocolDTMF KeypadThe DTMF keypad is laid out in a 4×4 matrix, with each row representing a low frequency, and each columnrepresenting a high frequency. Pressing a digit key (such as '1') will generate a sinusoidal tone for eachof two frequencies (697 and 1209 hertz (Hz)). The switch can decode the frequency group and locate thecorresponding key.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 # D
