There are 3 versions of the GeoPort adapter, two of these can be used internationally, one can only be used within the United States.
Model Computers International
----- --------- -------------
M1694LL/A Quadra 660 and 840 No
M1694LL/B Quadra 660 and 840 Yes
M3127LL/A Quadra and Power Macintosh Yes
Model M1694LL/A can only be used with Quadra computers. This model has a problem with very old telephone equipment, which will not allow the GeoPort to break the dialtone. It can only be used within the United States.
Model 1694LL/B corrects the problem where the Tip and Ring line are transposed. The software included with this model does not support the Power Macintosh computers. However, with the proper software, this model could be used with the Power Macintosh. It can also be used both inside and outside the United States.
Model M3127LL/A is essentially Model 1694LL/B, but it contains software that can be used in both Power Macintosh and Quadra computers. This model can also be used internationally.
Support Information Services