IVR (Interactive Voice Response) allows a computer to interpret the speech of a human being as input to the system. Similar to a touch tone system that listens to the unique sound of each button press a user makes, the IVR system analyzes the sound of the user speaking and converts the user's speech to a format it can interpret. Like a traditional touch tone system, the user navigates the computer system by making menu selections or responding to requests for other, more complex input. With Interactive Voice Response systems, Read More

Service Provider If a user is being harassed by unwanted or threatening phone calls, the first thing he/she needs to do is contact his/her service provider. The service provider will then tell the user what to do and inform them about the various methods of blocking unwanted calls. The service provider may also block the unwanted call or block all incoming calls until a solution is found. Also, if a user is receiving threatening calls, the service provider can contact the authorities and possibly assist in locating the caller/pressing charges Read More

MP3 or MPEG-1 Audio Layer 3 is a patented audio technology benchmark and compressing format. It compresses audio files to about one-twelfth of the original size, based on lossy data compression, and also maintains the same quality of audio playback. It was created by the Moving Picture Experts Group (MPEG) as a component of its MPEG-1 standard. MP3 files first gained popularity because of its free availability on the internet. The small file size and the ease of conversion of CD audio files into MP3 files helped peer to peer Read More

With practically everyone owning a mobile phone and spending a considerable amount of time on them each day, it is wise to ask the question: Are mobile phones dangerous to one’s health? While there are no conclusive answers at the moment, there are conflicting studies. Some show that mobile phones are safe and others show that mobile phones may pose a health risk. Mobile phones may be considered potentially dangerous in a few ways. First, they send and receive high frequency radio waves. Second, these devices have batteries in them Read More

Teleconferencing is a live feed between multiple people by means of a camera, microphone, and/or other devices. Teleconferencing is used by both residential and commercial users to communicate with each other without being in the same room. Teleconferencing is different than telephony, although it may utilize a telephone connection, because it allows users to actually see each other and/or transfer data. Additionally, teleconferencing can support many different users simultaneously and allow them to share information with any other user in the teleconference either individually or as a whole.   How Read More

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 to NAMPS (Narrowband Advanced Mobile Phone Service), a version of AMPS that uses 10 kHz channels and by doing so triples cellular capacity. AMPS by Any Other Name Europeans often refer to AMPS as "American Read More

TracFone is the 6th largest mobile network operator in the United States. It allows its customers to purchase airtime usage when they purchase phones that companies like Nokia, LG, and Motorola make. A TracFone customer has to activate the cell phone before using it. It can be activated via the TracFone website or TracFone customer care. It is also possible to download the programming codes from the website directly to the cell phone. Customers can also utilize the OTA (Over The Air) feature to activate a TracFone. The TracFone’s OTA Read More

IS-95 is a standard for CDMA (Code Division Multiple Access) Digital Cellular. Mobile Frequency Range Rx: 869-894; Tx: 824-849 Multiple Access Method CDMA/FDM Duplex Method FDD Number of Channels 20 (798 users per channel) Channel Spacing 1250kHz Modulation QPSK/OQPSK Channel Bit Rate 1.2288Mb How CDMA Works In a CDMA system, your encoded voice is digitized and divided into packets. These packets are tagged with "codes." The packets then mix with all of the other packets of traffic in the local CDMA network as they are routed towards their destination. The Read More

Long term evolution (LTE) is a project name that is given to the next generation of mobile phone speed otherwise known as 4G. Specifically, LTE is the last step that mobile phone companies have made to increase the speed and efficiency of their mobile phone devices. While LTE has been marketed as 4G, it doesn't quite comply with all the rules of IMT Advanced 4G requirements. Regardless, many companies across the world have announced that they are going to be pushing for 4G over the coming years starting in 2009. Read More

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 you to place your call. The actual tones are: Nickel: 35-160ms 1700hz & 2200hz tone burst, followed by 240ms of silence. Dime: Two 35-160ms 1700hz & 2200hz bursts, with a spacing of 20-110ms between the Read More