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    • What is MiFi?

      What is MiFi?

      MiFi stands for “My Wi-Fi” or “Mobile Wi-Fi”, and represents a line of relatively small wireless routers developed by Novatel Wireless, which turn a mobile broadband internet connection into a Wi-Fi hotspot. These hotspots support up to 5 Wi-Fi enabled devices within a range of 10 meters. This means that any Wi-Fi enabled device, from

    • IMSI (International Mobile Subscriber Identity)

      IMSI (International Mobile Subscriber Identity)

      IMSI (International Mobile Subscriber identity) is the information that is used for identification of a mobile phone end-user on a network  and is uniquely associated with a given cell phone The IMSI code is stored as a 64 bit number or field, and is sent by the mobile phone to the cellular network. The code

    • AMPS (EIA/TIA-553) and NAMPS (IS-91)

      AMPS (EIA/TIA-553) and NAMPS (IS-91)

      Mobile Frequency Range Rx: 869-894; Tx 824-849 Multiple Access Method FDM Duplex Method FDD Number of Channels 832 Channel Spacing 30kHz Modulation FM AMPS AMPS (Advanced Mobile Phone Service) was the first cellular mobile system in the United States. AMPS operates as an analog system using 30 kHz wide channels. NAMPS AMPS was later enhanced

    • RBOC (Regional Bell Operating Company)

      RBOC (Regional Bell Operating Company)

      RBOC (The Regional Bell Operating Companies) were created as the result of a legal dispute between the US Justice Department and the AT & T Corporation. In 1984, the American Telephone & Telegraph Company split its local operations into 7 autonomous RBOCs that became known as “Baby Bells”. In the beginning, these companies were called

    • Mobile Software

      Mobile Software

      Mobile software refers to software that can be stored and executed on a mobile device such as a cell phone, PDA, smart phone, or similar device. Mobile software can range in its capabilities as some simply change the virtual appearance of the device while others provide important features such as menu layouts and password protection.

    • SCM: Station Class Mark

      SCM: Station Class Mark

      The SCM (Station Class Mark) is a 4 bit number which holds three different pieces of information. Your cellular telephone transmits this information (and more) to the cell tower. Bit 1 of the SCM tells the cell tower whether your cellphone uses the older 666 channel cellular system, or the newer 832 channel cellular system.

    • Smartphone

      Smartphone

      A smartphone is a mobile phone with a considerably greater amount of functionality than an ordinary mobile phone or a feature phone. Smartphones can be considered a blend between a mobile phone and a full featured mobile computer, similar to the PDAs (Personal Digital Assistants) of the past, but even more capable. They typically include

    • How to Make a Lineman’s Handset

      How to Make a Lineman’s Handset

      This is the “right hand” of both the professional and the amateur lineman. Basically, it is a customized portable telephone which is designed to be hooked onto raw cable terminals in the field and used to monitor the line, talk, or dial out. The monitor function is usually the main difference between the “butt-in” test

    • CLLI Codes

      CLLI Codes

      CLLI codes, or Common Language Location Identifier, pronounced “silly codes”, are codes used by telecommunication companies to identify specific industry equipment. CLLI codes are 11 characters long, may be comprised of a combination of letters and numbers, and are used by all telecommunication companies in North America. While CLLI codes were first created and used

    • Tumbling

      Tumbling

      Tumbling exploits a weakness in the AMPS/NAMPS roaming system. In tumbling, you first configure the SIDH in your mobile telephone to pretend to be from another cellular carrier. If you are in Colorado, for example, you would configure your mobile telephone as if it were subscribed to a cellular carrier in Texas. Next, you modify

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