HP iPAQ hw6910 HP iPAQ and GSM/GPRS/Edge Technology - Page 6

Glossary Term EDGE GPRS GSM MMS Push E-mail SIM card SMS TDMA VPN Definition Enhanced Data Rates for Global Evolution, an enhancement to GPRS technology that enables higher speed data connections than GPRS. General Packet Radio Service, an enhancement to the GSM mobile communications system that supports data packets. GPRS is suitable for sending and receiving data, such as e-mail or file transfers. Global System for Mobile Communications, a digital cellular phone technology based on time division multiple access (TDMA) technology. GSM is a circuit-switched system that divides each 200 kHz channel into 8 time slots. Multimedia Messaging Service, an enhanced transmission service that allows cellular phone users to transmit photographs, video clips, sound files and short text messages over wireless networks. Push technology keeps your Outlook Mobile up-to-date by delivering Inbox, Calendar, Contacts, and Tasks list quickly and directly to your HP iPAQ while synchronized over GSM/GPRS/EDGE or Wi-Fi through a corporate Microsoft Exchange server. GoodLink e-mail solution offers the Push e-mail technology. Subscriber Identity Module, an intelligence module that operates GSM phone features and contains a computer chip with information like user phone number, service, registration information and contacts. SIM cards also contain the memory to store speed dial numbers and text messages Short Messaging Service, a text message service that allows cellular phone users to send and transmit short messages up to 160 characters long. Time Division Multiple Access (IS 136) technology is named for the frequency bands that are available to a network that is divided into time slots. Each user has access to one time slot at regular intervals. TDMA IS 136 uses time division multiplexing for voice and control channel transmissions for business and home use. (The major phone carriers using TDMA technology are AT&T Wireless Services, Bell South, and Southwestern. Bell). Virtual Private Network, a type of technology designed to increase the security of information transferred over the Internet. VPN works with either wired or wireless networks, as well as with dial-up connections. VPN creates a private encrypted tunnel from the end user's personal computer, through the local wireless network, through the Internet, to the corporate servers and database. 6