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300-070 · Question #170

Refer to the exhibit. What is the problem when 237 dials 972551915?

The correct answer is D. The problem is in "forward-digits 7"; the dial peer should be with "forward-digits 8.". When 237 dials 972551915 (9 digits), the 'forward-digits' command controls how many digits from the right of the dialed string are forwarded to the PSTN. With 'forward-digits 7', only the last 7 digits (2551915) are sent, which strips too many leading digits. The correct value…

Troubleshooting

Question

Refer to the exhibit. What is the problem when 237 dials 972551915?

Exhibit

300-070 question #170 exhibit

Options

  • AThe problem is in "forward-digits 7"; the dial peer should be with "forward-digits 9."
  • BThe problem is in "forward-digits 7"; the dial peer should be with "forward-digits 5."
  • CThe problem is in "forward-digits 7"; the dial peer should be with "forward-digits 2."
  • DThe problem is in "forward-digits 7"; the dial peer should be with "forward-digits 8."

How the community answered

(23 responses)
  • A
    9% (2)
  • B
    4% (1)
  • C
    17% (4)
  • D
    70% (16)

Explanation

When 237 dials 972551915 (9 digits), the 'forward-digits' command controls how many digits from the right of the dialed string are forwarded to the PSTN. With 'forward-digits 7', only the last 7 digits (2551915) are sent, which strips too many leading digits. The correct value is 'forward-digits 8', which forwards 72551915 - the 8-digit number that includes the area code (725) and local number (51915x), matching what the carrier expects after the leading access digit '9' is removed. Options A, B, and C specify incorrect digit counts that either over-strip or under-strip the dialed string.

Topics

#forward-digits#digit manipulation#dial peer#PSTN routing

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