LG LGVX3450 Owner's Manual - Page 81

GPS IS 2000 NAM SID Global Positioning System is a system of satellites, computers, and receivers able to determine the latitude and longitude of a specific receiver on Earth. Position is calculated using time and distance. Type of digital signaling. It's the second generation of CDMA digital cellular, an extension of IS-95. Differences between signaling types have to do with pilot signal and links to provide more traffic channels, and control protocols. Number Assignment Module is how the phone stores the phone number and its electronic serial number. A multiple NAM phone can register with multiple service providers and be set to automatically switch between programmed phone numbers for service provider areas. System Identification is a number transmitted by base stations to identify a wireless system which conforms to a TIA cellular or PCS standard. SID is used by mobile phones to recognize when they are in their home system and can be used for billing purposes as a unique identification of the serving system. SMS Short Message Service is a service available on most digital mobile phones to send messages between phones or other devices. Messages are routed a Short Message Service Center (SMSC), which attempts to send the message and, if unsuccessful, possibly retry at a later time. Message delays or message loss is possible, especially when sending between networks. Users can request delivery confirmation reports. TTY Teletypewriter. An electromechanical typewriter that either transmits or receives messages coded in electrical signals. A phone with TTY support is able to translate typed characters to voice or translate voice into characters to display on the TTY. VX3450 79