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Chapter 84 Configuring Time Range
84.1 Time Range Introduction
84.1.1 Overview
Time Range is a time module controlling the effective time and the failure time of a function (For instance,
expansion IP access control list).
Time Range can play its role only when cooperating with other modules which support the Time Range function.
Time Range is consisted of separate time ranges. These time ranges have two kinds: one is absolute and the
other is periodic. Of these, periodic is classified into two kinds further: isolate and from-to.
The whole system has many Time Ranges. Each Time Range is differentiated according to their names(case
sensitive). Each Time Range has at most only one absolute time range but many periodic time ranges.
84.1.2 Absolute Time Range
Absolute Time Range is a time range starting and ending with concrete date and time (The Absolute Time
Range without concrete starting date and time is taken as the current time; the absolute time range without
concrete ending time is taken as effective forever.). For example, 08:08 8 8 2008 - 10:10 10 10 2010 is an
absolute time range.
84.1.3 Periodic Time Range
Periodic Time Range is a back-and-forth time range. It has no concrete starting time and ending time, but it
has concrete starting week and moment and ending date and moment. For example, a periodic time range
starts from 20:00~21:00 on every Tuesday, Thursday and Sunday; or starts from 09:00 on every Tuesday to
18:00 on every Thursday. More examples such as 09:00~10:00 in every weekend; 23:00~07:00 everyday; and
09:00~18:00 on weekdays.
84.1.4 Isolating Time Range
Isolate Time Range is one type of Periodic Time Range. It is periodical. And its starting time and ending time
will not span 24 hours. For example,19:00~19:30 on every Monday is an isolate time range; 20:00~21:00 on
every Tuesday, Thursday and Sunday is an isolate time range; but time from 09:00 on Tuesday to 18:00 on
every Thursday is not an isolate time range, but "from-to time range" described below.
84.1.5 From-to Time Range
From-to Time Range is also a type of Periodic Time Range. It is periodical. Moreover, its starting time and
ending time must span at least 24 hours. For example, time from 09:00 on Tuesday to 18:00 on every Thursday