LG VX5600 User Guide - Page 130

Glossary IS 2000 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. NAM Number Assignment Module is how the phone stores the phone number and its electronic serial number. SSL Secure Sockets Layer Protocol used to encrypt data sent over the air. 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. 128