Porting existing ISDN drivers

If you already have an ISDN device driver that complies with the CAPI 2.0 specification, you need to:

• make sure it is compliant with Device Driver Interface (DDI) version 8

• add an MDI/STREAMS layer on top of CAPI

• make some minor modifications to your CAPI interface

If you have a proprietary ISDN interface, you must modify it to accept CAPI requests and respond with CAPI indications. For simplified maintenance and improved portability, we recommend that you convert your proprietary ISDN interface to CAPI.