How to Defeat Caller-ID Blocking

How to Defeat Caller-ID Blocking

One trick to defeat Caller-ID blocking is to forward your phone line to a friend who lives in another LATA. When your friend receives the anonymous phone call, have him use *69 Call Return to dial to offending party back. As he is now placing a long distance phone call, the telephone number of the anonymous caller will show up on your friend's phone bill at the end of the month. A variation of this trick is available in areas where the local phone company offers per-call billing (as opposed t

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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 he/she will probably get a busy tone and his/her call won't reach you. There are multiple ways to achieve the same. Service Provider If a user is being harassed by unwanted or threa

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NAM: Number Assignment Module

NAM: Number Assignment Module

The NAM (Number Assignment Module) is the EPROM (Erasable Programmable Read-Only Memory) in a mobile telephone which holds information such as the MIN (or MDN) and SIDH.  The data fields stored in a phone's NAM vary between the various mobile telephone specifications, such as AMPS/NAMPS, GSM, PCS, CMDA.  In modern networks, NAMs can be reprogrammed Over-The-Air (OTA). Dual and Multi-NAM Phones Some mobile handsets are equipped with NAM's which can hold multiple telephone numbers.  This

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Prepaid Cell Phones vs Contract Phones

Prepaid Cell Phones vs Contract Phones

Prepaid cell phones are mobile phones that are not associated with a long term contract and, therefore, do not incur the overage charges and late fees associate with contract plans. Prepaid cell phones are paid before the mobile service is activated on a monthly or “pay-as-you-go” basis and are deactivated when the service term expires if the customer does not add more money to his/her account.   What Are Contract Phones? Contract phones are the most popular type of mobile phon

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Predictive Dialer Software

Predictive Dialer Software

Predictive dialer software is designed to automatically dial the correct number of telephone calls to match the pattern of available call center personnel. Without predictive dialing software, an outbound call center will have to wait between phone calls until another person answers the phone. This can be quite expensive in terms of lost productivity. With a predictive dialer, a new phone call should be available as soon as the call center agent hangs up with the last phone call. Predictiv

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iDEN (Integrated Digital Enhanced Network)

iDEN (Integrated Digital Enhanced Network)

An IDEN, or Integrated Dispatch Enhanced Network, is a radio service provided by some mobile telephones that allows subscribers to talk to nearby subscribers who have similar phones without dialing their individual numbers. IDENs are often provided as a free service on modern mobile phones, such as Nextel, or as a premium service that can be activated, such as on SouthernLINC phones. IDENs are technically able to support communications up to 6 miles in all directions, but have a practical limit

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Caller-ID

Caller-ID

Calling Number Delivery (CND), better known as Caller ID, is a telephone service intended for residential and small business customers. It allows the called Customer Premises Equipment (CPE) to receive a calling party's directory number and the date and time of the call during the first 4 second silent interval in the ringing cycle. Caller-ID Parameters The data signaling interface has the following characteristics: Link Type: 2-wire, simplex

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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 by Bell, they were soon adopted by all telecommunication companies due to their need to be interconnected with Bell. Today,

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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 can also be used by the mobile network to obtain additional information about the phone from the HLR (home location register) or from the visitor location register. In order to help minimiz

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Cell Phone Cloning

Cell Phone Cloning

Cell phone cloning refers to the act of copying the identity of one mobile telephone to another. This is usually done to make fraudulent telephone calls. The bill for the calls go to the legitimate subscriber. This made cloning very popular in areas with large immigrant populations, where the cost to "call home" was very steep. The cloner is also able to make effectively anonymous calls, which attracts another group of interested law breakers. Cell phone cloning started with Motorola "bag"

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