Dr. Martin Cooper is the person credited with both inventing the modern cell phone as well as making the first cell phone call in New York City, New York in April 1973. A related invention is the cave radio phone invented by Nathan Stubblefield who was awarded a patent for the idea in the early …
MiFi stands for “My Wi-Fi” or “Mobile Wi-Fi”, and represents a line of relatively small wireless routers developed by Novatel Wireless, which turn a mobile broadband internet connection into a Wi-Fi hotspot. These hotspots support up to 5 Wi-Fi enabled devices within a range of 10 meters. This means that any Wi-Fi enabled device, from …
The ABCD tones are additional DTMF tones that may be used in any way the standard (0-9) tones are used. These tones are generated using a Silver Box. Engineers envisioned phones being used to access computers and other devices. This vision led to the addition of the number sign (#, sometimes called ‘octothorpe’ or ‘pound’) …
Many wireless providers across the globe, including AT&T/Cingular, T-Mobile, Vodafone, and Verizon sell Blackberries. When these companies sell a BlackBerry, they do so at a discount in order to attract customers. The providers then make up the lost profits over the lifetime of their contract with the customer. To protect those profits, the wireless providers …
For many small, medium and large businesses outsourcing a call center is an excellent way to generate sales and help current customers with tech support and customer support issues. While some larger companies have the money, time and resources to put in place their own call center, most smaller and mid sized businesses opt for …
RBOC (The Regional Bell Operating Companies) were created as the result of a legal dispute between the US Justice Department and the AT & T Corporation. In 1984, the American Telephone & Telegraph Company split its local operations into 7 autonomous RBOCs that became known as “Baby Bells”. In the beginning, these companies were called …
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 …
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 …
A “Milliwatt (102 Type) Test Line” is a signal generated from an Access Service Provider end office to the customer’s location for the purposes of transmission measurement, that is, testing the line quality and loss of transmission. The generated signal is a 1004 Hz tone at 0 dBm, which is the equivalent of 1 milliwatt …
DSN stands for the Defense Switched Network which is a global phone service used by the United States government capable of both non-secure and secure communications. Traditionally, the DSN network has only been used for voice communications, but in the past decade data and video service have been incorporated into the network through Integrated Services …