H.264 encoding, the main reason for blocking is () (single choice)

Which of the following is correct about backing up and restoring data on U1900 series unified gateways? () (multiple choice)

One codec rate is 64kbps, and the packaging time is 20ms. What is the IP band occupied by the codec? The width is () kbps (Note: IP/UDP/RTP header is 40 Bytes, here 1kbps=1000bps)

All MCUs under the same service area must have the same prefix number. () Right or Wrong

The POTS user number in the U1900 system is bound to the analog port, and has nothing to do with the analog phone connected to the analog port () Correct or Wrong