17
3COM IMPACT FAMILY COMPARISON

Features

ISA Adapter External Digital Modem

Multilink PPP for fast dial-up access ✔✔
DOS and Windows installation software ✔✔
Standards-based for wide compatibility ✔✔
Built-in NT1 for easy installation (North America) Option ✔
International ISDNsignaling support ✔
Direct bus interface for maximum throughput ✔
Compression for improved performance Future (Stac-over ISDN) V.42bis (analog modem only)
Software configurable—no jumpers or switches! ✔✔
Windows 95 plug-and play ✔✔
Emulates a LAN connection (LAN drivers included) ✔
Compatible with a variety of communications ✔
programs (supports AT command set)
Simultaneous voice/fax and data ✔
Integrated V.32bis fax/modem for backwards compatibility Option
Multi-platform support (PC, Macintosh, UNIX, laptops) ✔
Bandwidth on-demand and spoofing with AccessBuilder 4000-ISDN ✔
Warranty Lifetime One Year

Support

Standards Compliance

Automatic Protocol Selection (QuickSelect) N/A ✔
Async-Sync Point-to-Point Protocol conversion N/A ✔
V.120 ✔
Voice and G3 fax ✔
V.32bis, V.42 error correction, V.42bis data compression Analog modem option
Bridging Control Protocol (BCP) ✔
Compression Control Protocol (CCP) Future
Password Authentication Protocol (PAP) ✔✔
Challenge Handshake Authentication Protocol (CHAP) ✔✔

ISDN Signaling

National ISDN-1 ✔✔
AT&T and Northern Telecom custom ✔✔
Euro-ISDN ✔
VN3 ✔
Circuit switched data ✔✔
Circuit switched voice ✔