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The feature's Message Manipulation Engine (MME) manipulates SIP messages in order to compensate for interoperability issues between differing vendor equipment and for dynamically correcting reparable protocol errors in SIP messages. The flows described in this article are message flows and should not be confused with call flows.

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1Inbound And Outbound Message Flow

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Message Flow

Inbound Messages

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The following example demonstrates a token match where the URI in the p-asserted-identity header is matched against the URI in the From header

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1Create Condition Rule

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Condition Rule Table

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1Condition Rule Table

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The Condition Rule Table a collection of all the user created Condition Rules.

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Message Rule tables are tables of tables. The inner tables are essentially sets (tables) of Condition Rules.

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1Message Rule Tables

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Application of Rule Tables

Message Rule Tables are simply sets of Condition Rules and are applied in SIP Signaling Groups when Message Manipulation is enabled.

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1Application Of Rule Tables

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