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    • Phone Switches

      Phone Switches

      Telephone switches route calls through the PSTN (Public Switched Telephone Network). When you pick up the handset on your home telephone, you are initiating a connection with your local telephone switch. When you dial a telephone number, your phone switch interprets the digits you dial and determines where to route your call. If your call

    • How to connect Bluetooth Devices

      How to connect Bluetooth Devices

      To connect Bluetooth devices, the most important to consider is that you have the right device to connect to the computer or cell phone. While most Bluetooth devices are able to sync with all different types of hardware, some of specific and therefore, before buying, make sure that what you are buying will work with

    • 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.

    • TIMSI

      TIMSI

      A TIMSI, or Temporary International Mobile Subscriber Identity, number is a random number that is created from a telecommunications subscriber’s IMSI number in order to provide additional security. While an IMSI is unique to each subscriber and is a permanent number that can be used to track a subscriber or interfere with his/her services, a

    • How to Block Incoming Calls

      How to Block Incoming Calls

      Blocking incoming calls can sometimes be quite important for many reasons. Someone may be troubling you over the phone, harassing you, giving blank calls and you just want to avoid a specific person. A simple way to do this is to block an incoming call of a specific person. That is, whenever that person calls

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