3Com U.S. Robotics 56K Voice, User Manual

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20 C
HAPTER
1: I
NTRODUCTION
Modulation Schemes
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V.90 (backwards-compatible with all US Robotics 56K Standards)
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ITU-T V.34+
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ITU-T V.34
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ITU-T V.32bis
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ITU-T V.32
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ITU-T V.22bis
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ITU-T V.22
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ITU-T V.23
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Bell 212A
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ITU-T V.21
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Bell 103
Security
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PAP, CHAP and MS-CHAP support
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Callback support for dial-in and dial-out calls
Upgradeability
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Flash memory for field firmware updates
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Firmware posted on 3Com’s Web site
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Fully upgradeable to future 56K standards
Diagnostics
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LED status display
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Statistics display
Warranty
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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/.