An engineer with ID378163512 is designing a new dial plan for a customer that has offices in several countries on four continents around the world. This client also want to integrate with a…

The correct answer is D. E.164. E.164 is the ITU-T international public telecommunication numbering plan that defines a globally unique format for telephone numbers (e.g., +12025551234). It is the recommended dial plan standard for multinational deployments because it is universally understood across all…

Infrastructure and Design

Question

An engineer with ID378163512 is designing a new dial plan for a customer that has offices in several countries on four continents around the world. This client also want to integrate with a Microsoft Lync backend, Which dial plan type does the engineer recommend?

Options

ASIP URI
BTEHQ
CH.323
DE.164

How the community answered

(38 responses)

A
3% (1)
B
8% (3)
C
3% (1)
D
87% (33)

Explanation

E.164 is the ITU-T international public telecommunication numbering plan that defines a globally unique format for telephone numbers (e.g., +12025551234). It is the recommended dial plan standard for multinational deployments because it is universally understood across all countries and carriers, eliminating ambiguity in routing. Microsoft Lync (now Skype for Business/Teams) natively uses E.164 format for phone number normalization and routing, making it the natural choice for integration. H.323 (C) is a signaling protocol, not a dial plan standard. SIP URI (A) is an addressing scheme but not ideal for PSTN interoperability across countries. TEHQ (B) is not a recognized standard dial plan type.

Topics

#Dial Plan#E.164#Global Numbering#Microsoft Lync Integration

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