Installation of MultiTech modem and modem scripts into Mac OS X is as follows:

1) Quit System Preferences if it is active (don't just close the window).
2) Copy the desired MultiTech Mac modem script(s) into:
   /Library/Modem Scripts
   in the root of the Mac OS X partition or drive.
3) Connect the MultiTech modem or terminal adapter to the Macintosh and turn it on if it is not already connected and/or turned on.
4) Open System Preferences from the Apple menu and select the Network pane.
5) Installation of a USB modem or USB terminal adapter:
   a) Select the Configure pop-up list and select Advanced.
   b) Select the item called "USB ModemYYY" where YYY is a number like 062. This is the MultiTech USB modem or USB terminal adapter assuming there are no other USB modems or USB terminal adapters connected to the USB. Normally you could double-click on this item and change its name to be more descriptive, but a bug in Mac OS X 10.0.x prevents proper renaming, so step (c) will explain how to rename this item if you wish to rename it.
   c) With "USB ModemYYY" selected, click on the Duplicate button, change the name of the item to a more descriptive name such as MT5634ZBA-USB if the USB device is a MultiTech MT5634ZBA-USB modem, and then click on OK.
   d) You may select the "USB ModemYYY" item again and click on Delete... if you wish to remove that item from the list since you now have a duplicate of that device already made.
   e) Make sure the USB modem or USB terminal adapter check box is checked.
   f) Now select the Configure pop-up list and choose your USB modem or USB terminal adapter (in this example, choose MT5634ZBA-USB).
6) Installation of a serial modem or serial terminal adapter:
   a) Select the Configure pop-up list and select Advanced.
   b) Make sure the "Modem Port" item check box is checked if your modem or terminal adapter is connected to the modem port. Make sure the "Printer Port" item check box is checked if your modem or terminal adapter is connected to the printer port.
   c) Now select the Configure pop-up list and choose the port to which your modem or terminal adapter is connected ("Modem Port" or "Printer Port").
7) Installation of the modem script:
   a) With the desired USB modem, USB terminal adapter, or serial port ("Modem Port" or "Printer Port") selected in the Configure pop-up list, you are ready to finish setting up the dial-up connection information.
   b) Set up the appropriate information in the TCP/IP tab.
   c) Set up the appropriate information in the PPP tab.
   d) Set up the appropriate information in the Proxies tab.
   e) Select the Modem tab and select the desired MultiTech Mac modem script from the pop-up list.
   f) Click on the Save button. You are now ready to use the Internet Connect application to test your dial-up connection.