Glossary 1XRTT 3G -- Third Generation 3GPP -- 3rd Generation Partnership Project 802.11 (a, b, g, n) -- Four different Wireless LAN standards based on 2.4GHz and 5.2Ghz RF frequencies AAA -- Authentication, Authorization, & Accounting AES -- Advanced Encryption Standard AIPN -- All IP Network AMPS -- Advanced Mobile Phone Systems AMS -- Advanced Multimedia System ARPU -- Average Revenue per User BSS -- WiFI Basic Service Set