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    • How to Block Caller-ID

      How to Block Caller-ID

      Always test as much as possible before relying on any technique to block Caller-ID. Some of these methods to block Caller-ID work in some areas, but not in others. Block Caller-ID For a Single Call Using a LASS Code Dial *67 before you dial the number. (141 in the United Kingdom) Block Caller-ID On All

    • Cell Phone Signal Boosters

      Cell Phone Signal Boosters

      Cell phone signal boosters (or cellular repeaters) are bidirectional amplifiers designed to boost the mobile phone reception using internal signal amplifiers, reception antennas and rebroadcast antennas. External antennas collect good cellular signal, and then it is transmitted to an amplifier, which retransmits the signal locally. This process results in much better signal. Rural areas often

    • LATA (Local Access and Transport Area)

      LATA (Local Access and Transport Area)

      A LATA (Local Access and Transport Area) is a geographical and administrative area that is the responsibility of an LEC (Local Exchange Carrier). It is an expression used in U.S. telecommunications law. LATA borders are outlined around markets, and not essentially along present state, province, or even area code borders. Several LATAs traverse over state

    • Ground Start

      Ground Start

      What is Ground Start? Ground Start or GST is a signaling technique for telephony from a terminal, or a subscriber local loop, to a telephone exchange in which a party gets a dial tone by momentarily grounding one side of a (telephone) circuit. The Ring side of a wire pair is usually the side that

    • How Video Conferencing Works

      How Video Conferencing Works

      Video conferencing has become popular over the last decade. Video conferencing is when two or more parties communicate in real time in separate locations with both video and audio signals. Technology Used in Video Conferencing Video conferencing works by using a few different technologies. Some of these technologies are hardware, others technologies involved in the

    • POTS (Plain Old Telephone Service)

      POTS (Plain Old Telephone Service)

      POTS (Plain Old Telephone Service), also known as PSTN (Public Switched Telephone Service), refers to the dominant telephone service in most residential and small business environments. A telephone company controls POTS, which allows consumers to make and receive calls on one line at a time. POTS differs from PBX, T-1, T-3, ISDN, VOIP, and other

    • Loop

      Loop

      Loops are a pair of phone numbers, usually consecutive, like 836-9998 and 836-9999. They are used by the phone company for testing. What good do loops do us? Well, they are cool in a few ways. Here is a simple use of loops. Each loop has two ends, a 'high' end, and a 'low' end.

    • 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

    • Blue Box

      Blue Box

      Blue boxes use a 2600hz tone to size control of telephone switches that use in-band signaling. The caller may then access special switch functions, with the usual purpose of making free long distance phone calls, using the tones provided by the Blue Box. To quote Karl Marx, blue boxing has always been the most noble

    • SIM Card

      SIM Card

      A SIM (Subscriber Identity Module) card is a type of interface card that is found in most modern cell phones and contains the user’s account information as well as some types of media, such as contacts, pictures, and sometimes ringtones. A SIM card contains an ICCID, or Integrated Circuit Card ID, number that identifies the

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