NETGEAR XM128 ISDN Reference Manual page 22

Reference Guide for the Model XM128 ISDN Digital Modem
The Model XM128 modem has two analog ports to connect analog devices such as fax machines,
modems, and telephones. Two different devices can communicate over the two B channels to
different locations simultaneously, enabling you to send a fax and make a voice call at the same
time. The analog ports recognize standard dual-tone multifrequency (DTMF) tones as well as
pulse dialing.
The Model XM128 modem has the following features:
• Plug-and-Play support for a windows 95
• Full compatibility with both ISDN and remote public-switched telephone network (PSTN) by
way of ISDN
• Multiple signaling protocol compatibility with DSS1, 1TR6, NI-1, AT&T 5ESS, and Northern
Telecom DMS 100 network switches
• X.75, V.110, V.120, and Point-to-Point Protocol (PPP) Async-to-Sync Conversion B Channel
Protocol support
• B channel speeds of 56 Kbps (in-band signaling) and 64 Kbps (out-of-band signaling)
• MLP and Multipoint PPP (RFC1717)
• Hi/fn LZS compression (STAC)
• V.42bis data compression using the X.75, V.120, and bundle protocols
• NETGEAR ISDN AT modem commands
• Automatic ISDN and analog call detection
• Two analog telephone jacks (analog adapters)
• Push-button switch for quick dial and teardown
• Easy-to-use configuration software
• Flash EPROM memory for easy firmware upgrades
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Introduction