300-070 Question #392: Real Exam Question with Answer & Explanation

The correct answer is E: 9. In a Cisco POTS dial peer, the explicit digits in the destination-pattern are stripped before forwarding, leaving only the wildcard-matched digit to be sent out the port.

Question

An engineer enters this configuration on a voice router: dial-peer voice 99 pots destination-pattern 115. port 1/0/0 Which digits does the router send out of the port 1/0/0 after the user dials the digits 1159?

Options

A1159
B115
C59
D11
E9

Explanation

In a Cisco POTS dial peer, the explicit digits in the destination-pattern are stripped before forwarding, leaving only the wildcard-matched digit to be sent out the port.

Common mistakes.

A. Forwarding all four digits '1159' would occur only if digit stripping were disabled, but POTS dial peers strip the literal portion of the destination pattern by default.
B. Sending '115' would mean the wildcard-matched digit was stripped and the literal digits were kept, which is the inverse of how POTS dial peer digit manipulation operates.
C. Sending '59' is incorrect because the wildcard '.' matches exactly one digit, so only one digit - not two - is forwarded after stripping the literal '115' prefix.
D. Sending '11' has no relationship to the destination-pattern matching or digit stripping logic applied by this dial peer configuration.

Concept tested. POTS dial peer destination-pattern digit stripping behavior

Reference. https://www.cisco.com/c/en/us/support/docs/voice/voice-quality/5420-dial-plan.html

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