![](/images/new-backgrounds/1206139/20613939x1.webp)
20CHAPTER 1: INTRODUCTION
Modulation Schemes
■V.90
■
■
■
■
■
■
■
■Bell 212A
■
■Bell 103
Security
■PAP, CHAP and
■Callback support for
Upgradeability
■Flash memory for field firmware updates
■Firmware posted on 3Com’s Web site
■Fully upgradeable to future 56K standards
Diagnostics
■LED status display
■Statistics display
Warranty
■3Com Corporation Limited Lifetime Warranty (refer to the end of this User Guide for details).
Support for Internet Applications
Support for applications that use the User Datagram Protocol (UDP) and the Transmission Control Protocol (TCP). The UDP protocol is used primarily by Internet games.
Look for the latest list of Internet applications and games that are interoperable with the LAN Modem at
http://www.3com.com/support/docs/lanmodem/.