AVM provides drivers conforming to the COMMON-ISDN-API 2.0 standard for all AVM ISDN controllers. These drivers offer CAPI 2.0 functionality and where technically feasible also support for CAPI 1.1 based applications. In some cases it may however be necessary to retain the older CAPI 1.1 drivers. This subdirectory exists for that purpose. It contains all available CAPI 1.1 controller set-ups for AVM ISDN controllers.