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  2. Virtual number - Wikipedia

    A virtual number, also known as direct inward dialing (DID) or access numbers, is a telephone number without a directly associated telephone line.Usually, these numbers are programmed to forward incoming calls to one of the pre-set telephone numbers, chosen by the client: fixed, mobile or VoIP.

  3. 555 (telephone number) - Wikipedia

    The telephone number prefix 555 is a central office code in the North American Numbering Plan, used as the leading part of a group of 10,000 telephone numbers, 555-XXXX, in each numbering plan area (NPA) (area code).

  4. Phone cloning - Wikipedia

    To obtain the MEID of your phone, simply open your phone's dialler and type *#06# to get its MEID number. The ESN or MEID is typically transmitted to the cellular company's Mobile Telephone Switching Office (MTSO) in order to authenticate a device onto the mobile network.

  5. E.123 - Wikipedia

    The non-dialable PBX (private branch exchange) extension number should be separated by words "extension" or "ext." in the national language after the phone number. When the PBX is capable of direct inward dialing, the extension number should be written directly after the phone number, without using any distinct symbols. If there is a need to ...

  6. Mobile phone signal - Wikipedia

    A mobile phone signal (also known as reception and service) is the signal strength (measured in dBm) received by a mobile phone from a cellular network (on the downlink). Depending on various factors, such as proximity to a tower , any obstructions such as buildings or trees, etc. this signal strength will vary.

  7. Telephone keypad - Wikipedia

    A telephone keypad is the keypad installed on a push-button telephone or similar telecommunication device for dialing a telephone number.It was standardized when the dual-tone multi-frequency signaling (DTMF) system was developed in the Bell System in the United States in the 1960s that replaced rotary dialing originally developed in electromechanical switching systems.

  8. Mobile number portability - Wikipedia

    Free (may request 5 EGP for new MNP SIM fee), was charging 75 EGP before NPC serves the centralized administrative and provisioning role of MNP. Number Portability Clearhouse is handled by Telcordia Technologies, where Giza Systems is the system integrator. Cannot revert to existing operator before 4 months of service to new operator.

  9. At sign - Wikipedia

    The at sign, @, is normally read aloud as "at"; it is also commonly called the at symbol, commercial at or address sign.It is used as an accounting and invoice abbreviation meaning "at a rate of" (e.g. 7 widgets @ £2 per widget = £14), but it is now seen more widely in email addresses and social media platform handles.