Which of the following statements are CORRECT in the CDR and billing scenario? (Multiple Choice)
Which of the following files are necessary when deploying IP phone auto version upgrade? (Multiple Choice)
User B's number has been added to the user A's personal blacklist. If user A wants to receive calls from user B, which of the following configurations is CORRECT?
The U1960 can load customized announcements one by one. The available customized announcement channel range is ().