How to clear history data

Double-click “System management > Data maintenance”

choose history data you want to clear

for example: clear cdr

choose “Cdr tables”, then choose “Begin time” and “End time” and choose filter

notice: if begin time and end time not choose, it mean’s filter all cdr tables

choose cdr tables time you want to clear, then choose Delete and choose Apply.

notice: the “system log” tables can’t be cleared

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