Refer to the exhibit. A call to an international number has failed. Which action corrects this problem?

The correct answer is B. Strip the leading 011 from the called party number. When placing international calls from a North American PSTN gateway, users typically dial '011' as the international exit code prefix. However, the PSTN and most gateways expect the number in E.164 format (e.g., +<country_code><number>) without the leading '011' domestic exit…

Call Control

Question

Exhibit

Options

AAssign a transcoder to the MRGL of the gateway.
BStrip the leading 011 from the called party number
CAdd the bearer-cap speech command to the voice port.
DAdd the isdn switch-type primart-dms100 command to the serial interface.

How the community answered

(39 responses)

A
3% (1)
B
85% (33)
C
5% (2)
D
8% (3)

Explanation

When placing international calls from a North American PSTN gateway, users typically dial '011' as the international exit code prefix. However, the PSTN and most gateways expect the number in E.164 format (e.g., +<country_code><number>) without the leading '011' domestic exit code. The dial-peer or translation rule on the gateway must strip the leading '011' before sending the call to the PSTN trunk, converting it to the proper format. Adding a transcoder (Option A) addresses codec mismatches, not dial plan formatting. Adding 'bearer-cap speech' (Option C) affects ISDN bearer capability, not number translation. Changing the ISDN switch type (Option D) is unrelated to the number format causing the call failure.

Topics

#Number manipulation#Dial plan#International dialing#Outbound call routing

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