The Care and Feeding of ISDN4BSD
5.5 Kernel Configuration for	5 Installation and Kernel	5.7 Kernel Configuration and

5.6 Kernel Configuration for PCI Cards

For a PCI card such as the ELSA MicroLink ISDN/PCI you need to add a line which enables support for your type of card, in this case it is the line:

options ``ELSA_QS1PCI''

Because PCI cards are automatically configured by the BIOS, all which is more required is a line:

device isic0

in the kernel configuration file.