VoiceGear SkyBridge User Manual - page 71
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9. Configuring Call Filters
VoiceGear SkyBridge features a comprehensive Call Filtering system which allows the user to create rules for
managing restrictions on inbound and outbound calls. You can create multiple cascading rules which will take
effect depending on various conditions specified for each rule. Filter rules are executed in the order in which
they are specified, thus it is important to ensure correct rule sorting order. You can rearrange the order in which
rules are executed by dragging and dropping each rule up and down in the list.
Each filter can contain one or more expressions that are used to match against the source or destination caller
ID as a condition. When a condition is matched, the related policy is applied. Conditions can contain letters,
numbers and special regular expressions, which allow you to match anything you need to filter your calls.
Regular expressions are python‐based. If you want to know more about python regular expressions syntax and
usage we recommend you to read official on‐line Python Regular Expression reference at
http://docs.python.org/lib/module‐re.html
.