The third and fourth ports of exterior line default inactive.
第三和第四个外线端口为关闭状态。
Can set time limitation for each conversation between extension and exterior line.
可限制分机和外线每次通话时间。
A slug line tells you where we are - interior or exterior, location, and approximate time.
说明文字标明了你所处的位置——室内还是室外,地点,以及大概的时间。
应用推荐