3Com Dual 56K Manual

A SERVICE OF

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20 CHAPTER 1: INTRODUCTION

Modulation Schemes

■ V.90 (backwards-compatible with all US Robotics 56K Standards)

■ ITU-T V.34+

■ ITU-T V.34

■ ITU-T V.32bis

■ ITU-T V.32

■ ITU-T V.22bis

■ ITU-T V.22

■ ITU-T V.23

■ Bell 212A

■ ITU-T V.21

■ Bell 103

Security

■ PAP, CHAP and MS-CHAP support

■ Callback support for dial-in and dial-out calls

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/.