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Which of the following is not the part of the e.164 number in the ITU-T numbering plan for geographic areas?

E.164 is an ITU-T recommendation which defines the international public telecommunication numbering plan used in the PSTN and some other data networks. It also defines the format of telephone numbers. E.164 numbers can have a maximum of fifteen digits and are usually written with a + prefix. To actually dial such numbers from a normal fixed line phone the appropriate international call prefix must be used. Which of the following is not the part of the e.164 number in the ITU-T numbering plan for geographic areas?

What is a numbering plan?

A telephone numbering plan is a plan for allocating telephone number ranges to countries, regions, areas and exchanges and to non-fixed telephone networks such as mobile phone networks. Dial plans should not be confused with numbering plans. A closed numbering plan, such as found in North America, features fixed length area codes and local numbers. An open numbering plan, as found in assorted countries that have not yet standardized, features variance in length of area code or local number, or both. The rules for dialing the numbers assigned by the numbering plan vary by defining which digits need not always be dialed (codes) and digits that must always be dialed (local number). What is a numbering plan?

Which best describes the auto-attendant in a Cisco Unified Communications environment?

In telephony, an automated attendant (also auto attendant or auto-attendant, or sometimes autoattendant or AA) system allows callers to be automatically transferred to a user’s extension without the intervention of a receptionist. A receptionist, who acts as the telephone operator, can be reached by pressing 0 on most systems. Although an automated attendant is usually a feature on modern PBX and key phone systems, it is possible to provide one on
standard lines and phones .Which best describes the auto-attendant in a Cisco Unified Communications environment?


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