The Care and Feeding of ISDN4BSD
5.5 Kernel Configuration for	5.5 Kernel Configuration for	5.6 Kernel Configuration for

5.5.1 FreeBSD 4.x and 5.x

Because of the i4b architecture changes, some PnP cards got their own driver:

Card Type	FreeBSD 4.x	FreeBSD >=5.x	Notes
AVM Fritz!Card PnP	device ifpnp0	device ifpnp 1
Teles 16.3c PnP	device ihfc0	device ihfc 1	also AcerISDN P10
Siemens based cards	device isic0	device isic 1	see the list of supported cards

Because ISA PnP cards are automatically configured by the BIOS⁴or the Operating System, there is no need to specify i/o-port, memory or interrupt values in the kernel configuration file, so you need a line like this for your Siemens/Infineon-chipset based PnP card:

device isic0

For the Siemens/Infineon-chipset based cards, you still have to supply an options string, for example:

options ``ELSA_QS1ISA''

for an ELSA QuickStep 1000pro ISA PnP card.