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QuestionQ221

Voice Gateways and Session Border Controllers

Users dial 9 before a 10-digit telephone number to place an off-net call. All 11 digits are sent to the Cisco Unified Border Element before the call goes to the PSTN. The PSTN provider accepts only 10 digits. Which configuration is required on the Cisco Unified Border Element for calls to succeed?

  • A voice translation-rule 1 rule 1 /^9ג€¦ג€¦ג€¦./ //
  • B voice translation-rule 1 rule 1 /^9.+/ //
  • C voice translation-rule 1 rule 1 /^9(ג€¦ג€¦ג€¦.)/ //
  • D voice translation-rule 1 rule 1 /^9/ //
Explanation

A Cisco IOS voice translation rule uses a match pattern and replacement pattern. ^ anchors the match at the start of the called number, so matching ^9 and replacing it with an empty value strips only the leading access digit and preserves the required 10-digit PSTN number.

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