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    • How to Change my PIN and PUK

      How to Change my PIN and PUK

      A PIN, or Personal Identification Number, is a number that is used on some SIM cards to prevent unauthorized use of the cell phone it is located in. PINs are not used by all SIM cards and may need to be setup before they can be used. A PIN is generally between 4 and 8

    • Pay as You Go Cell Phones

      Pay as You Go Cell Phones

      Sometimes called pre paid or prepay cell phone plans, Pay as You Go Cell Phones are usually used in specific types of mobile phone calling plans. Unlike standard mobile phone calling plans that charge a set monthly fee for a specific amount of calls, pay as you go cell phone calling plans only require the

    • Numbers that always Ring Busy

      Numbers that always Ring Busy

      In the following listings, "xxx" means that the same number is used as a constantly busy number in many different prefixes. In most of these, there are some exchanges that ring busy and some exchanges that are in normal use. ALWAYS test these numbers at least three times during normal business hours before using as

    • * (LASS) Codes

      * (LASS) Codes

      LASS codes are numbers you enter on your telephone touch-pad to access special features of the telephone system. The most well-known LASS codes are *67 to toggle Caller-ID blocking and *69, for Call Return. Local Area Signalling Services (LASS) and Custom Calling Feature Control Codes: Service Tone Pulse Notes Assistance/Police 12 n/a [1] Cancel forwarding

    • Call Back Security

      Call Back Security

      Call back security, also known as dial back security, is a security mechanism used to authenticate users over dialup lines. The way call back security works is the dialup user calls into the system and enters his username and password. The system then hangs up on the user and calls the user back at a

    • 66 block

      66 block

      A 66 block is a punch-down block used to connect wiring for telephone systems and other low-speed low-voltage wiring applications. A punch-down tool is used to force solid wire into metal slots on the 66 block. The 25-pair standard non-split 66 Block encloses 50 rows; each row has four columns of clips that are electrically

    • 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

    • Red Box

      Red Box

      When a coin is inserted into a payphone, the payphone emits a set of tones to ACTS (Automated Coin Toll System). Red boxes work by fooling ACTS into believing you have actually put money into the phone. The red box simply plays the ACTS tones into the telephone microphone. ACTS hears those tones, and allows

    • ESN (Electronic Serial Number)

      ESN (Electronic Serial Number)

      ESN (Electronic Serial Number) An Electronic Serial Number is a code created to identify mobile devices. An ESN is 32 bits long, and the distribution of information in those bits has changed as the standard has evolved. The first 8 bits originally represented the manufacturer code, leaving 24 bits for the manufacturer to assign codes

    • Phone Phreaking

      Phone Phreaking

      Phone phreaking is the act of gaining illegal access to resources of telecom networks for fun or malicious activity. Before computer hacking took over, phreaking was the dominant underground tech activity. Some phone phreakers just wanted to understand how telecom infrastructure worked. Others wanted to make free long distance phone calls. As voice and data

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