300-815 · Question #95
Drag and Drop Question Drag and Drop the commands from the bottom to the blanks in the code to implement a translation rule to allow only 11 digits to be received over a SIP trunk to a SIP provider. T
This question tests the ability to configure a Cisco CUBE voice translation rule that strips the E.164 '+' prefix and enforces an 11-digit format before forwarding calls to an upstream SIP provider. It requires knowledge of Cisco IOS voice translation-rule syntax and regular expr
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Explanation
This question tests the ability to configure a Cisco CUBE voice translation rule that strips the E.164 '+' prefix and enforces an 11-digit format before forwarding calls to an upstream SIP provider. It requires knowledge of Cisco IOS voice translation-rule syntax and regular expression pattern matching.
Approach. Since Cisco UCM sends calls in E.164 format (e.g., +14085551234), the CUBE must strip the leading '+' and pass only the 11-digit NANP number (14085551234) to the SIP provider. The correct implementation uses 'voice translation-rule' with a regex 'rule' that matches '^+([0-9]{11})$' and replaces it with '\1' (the captured group). This profile is then bound to the outbound SIP dial-peer using 'translation-profile outgoing <profile-name>', ensuring only valid 11-digit E.164 bodies reach the provider. The key commands are: 'voice translation-rule <#>', 'rule 1 /^+([0-9]{11})$/ /\1/', 'voice translation-profile <name>', 'translate called <rule#>', and dial-peer assignment with 'translation-profile outgoing'.
Concept tested. Cisco CUBE (Cisco Unified Border Element) voice translation-rule configuration - specifically using IOS regex-based 'rule' statements inside a 'voice translation-rule' block to normalize E.164 SIP URIs (strip leading '+') and enforce digit-length constraints (11 digits) for SIP trunk interoperability with external providers.
Reference. Cisco CUBE Configuration Guide - Voice Translation Rules and Profiles; CCNP Collaboration / Cisco Unified Communications (300-810 CLICA or 300-815 CLACCM exam objectives covering digit manipulation on CUBE
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