Learn how presearch transforms in Cisco dial plans enable protocol and source-based call routing regulations for the 300-820 certification exam. Discover how to manipulate source aliases before applying search rules for granular control over call routing.
Table of Contents
Question
Which dial plan settings can be used to set up different regulations according to the protocol (SIP or H.323) or the source of the query?
A. presearch transforms
B. search rules
C. call policy
D. policy services
Answer
A. presearch transforms
Explanation
Presearch transforms are the dial plan settings that allow you to set up different regulations based on the protocol (SIP or H.323) or the source of the query. They enable you to manipulate the source aliases before the search rules are applied, providing flexibility in call routing based on specific criteria.
Presearch transforms can be used to:
- Strip or add prefixes to the alias
- Convert between different alias formats
- Change the alias based on the protocol or source of the query
By configuring presearch transforms, you can ensure that the appropriate search rules are applied to the modified alias, enabling granular control over call routing based on the originating protocol or source.
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