As of version 1.5, the Apple Modem Tool connection tool has had the ability to customize the list of modems that it supports. One way of doing this is to import a "modem definition file".
This archive contains files that have been provided by modem manufacturers as well as individuals. As of this writing, the achive contains files provided by Prometheues, Supra and Global Village for their modems, as well as the "AMT More Modems" archive provided by Jim Hebert. They currently contain definitions for the following brands/models of modem:
AMT-Global Village (Provided by Global Village Communications, Inc.)
Global Village TelePort ADB/Bronze
Global Village TelePort Bronze II
Global Village TelePort Bronze Performa
Global Village TelePort Silver/Gold
Global Village TelePort Mercury
Global Village PowerPort Bronze
Global Village PowerPort V.32
Global Village PowerPort Silver/Gold
Global Village PowerPort Mercury
AMT-More Modems (Provided by Jim Hebert)
PPI-14400FXSA
AT&T Dataport 14.4
Zxyel 1496E
Telelink IMS-08
AMT-Prometheus (Provided by Prometheus Products, Inc.)