Is the voice file universal across different versions of the U1900 series unified gateway

During the device restart, enter R when the system prompts you to press R to restore the default password. At the prompt "[.Conform to restore password.](Y/N):>", enter Y. The following information is displayed: Success to restore default password! Success to save default password! Then, you can use the default password to log in to the gateway.

The data volume of an uncompressed sound is calculated based on the following formula: Data volume (bit/s) = Sampling frequency (Hz) x Sampling bits (bit) x Number of sound tracks/8. According to the formula, the data volume of a monaural voice file with the sampling rate being 8 Hz and sampling bits being 8 is calculated as follows: 8000 Hz x 8 bit x 1/8 = 8000 bit/s = 7.8125 kbit/s. Based on the recording requirements on VU channel voice files, the data volume is calculated as 7.8125 kbit/s. ?U 1910/U1930/U1980: A single VU channel voice file can last 32 seconds, and the size is 250 KB. ? U1911/U1960/U1981: A single VU channel voice file can last 300 seconds, and the size is 2343 KB.

The maximum size (in KB) of a VU channel voice file supported by the U1900 series unified gateway is calculated as follows: The data volume of an uncompressed sound is calculated based on the following formula: Data volume (bit/s) = Sampling frequency (Hz) x Sampling bits (bit) x Number of sound channels/8. According to the formula, the data volume of a monaural voice file with the sampling rate being 8 kHz and sampling bits being 8 is calculated as follows: 8000 Hz x 8 bit x 1/8 = 8000 bit/s = 7.8125 kbit/s. Based on the recording requirements on VU channel voice files, the data volume is calculated as 7.8125 kbit/s. 1. The maximum size of a VU channel voice file supported by the U1910/U1930/U1980 is 250 KB. 2. The maximum size of a VU channel voice file supported by the U1911/U1960/U1981 is 2343 KB.

To back up a voice file for the U1900 series unified gateway, do as follows: Log in to the U1900 using the LMT and access the Config mode. Choose Version > Configuration File Management > Configuration, select the voice.zip file to back up, set Execution Mode to Back Up, specify the directory for saving the backup, select the corresponding device, and click Execute.

Method of configuring voice conference function of the U1900 series unified gateway: For details, see Configuration > Feature Guide > Voice Meeting in the product documentation .