ISDN(4)                 NetBSD Kernel Interfaces Manual                ISDN(4)

NAME
     isdn -- ISDN kernel to userland master device

SYNOPSIS
     pseudo-device isdn

DESCRIPTION
     The isdn device driver is used by the isdnd(8) daemon to exchange mes-
     sages with the ISDN kernel part for the purpose of call establishment,
     control and disconnection and to access various control and status infor-
     mations.

     The messages and message parameters are documented in the include file
     /usr/include/netisdn/i4b_ioctl.h.

     The available ioctl's are:

           I4B_CDID_REQ
                   Request a unique Call Description IDentifier (cdid) which
                   identifies uniquely a single interaction of the local D
                   channel with the exchange.
           I4B_CONNECT_REQ
                   Actively request a call setup to a remote ISDN subscriber.
           I4B_CONNECT_RESP
                   Respond to an incoming call, either accept, reject or
                   ignore it.
           I4B_DISCONNECT_REQ
                   Actively terminate a connection.
           I4B_CTRL_INFO_REQ
                   Request information about an installed ISDN controller
                   card.
           I4B_DIALOUT_RESP
                   Give information about call setup to driver who requested
                   dialing out.
           I4B_TIMEOUT_UPD
                   Update the kernels timeout value(s) in case of dynamically
                   calculated shorthold mode timing changes.
           I4B_UPDOWN_IND
                   Inform the kernel userland drivers about interface soft
                   up/down status changes.
           I4B_CTRL_DOWNLOAD
                   Download firmware to active card(s).
           I4B_ACTIVE_DIAGNOSTIC
                   Return diagnostic information from active cards.

     Status and event messages available from the kernel are:

           MSG_CONNECT_IND
                   An incoming call from a remote ISDN user is indicated.
           MSG_CONNECT_ACTIVE_IND
                   After an incoming call has been accepted locally or an out-
                   going call has been accepted by a remote, the exchange sig-
                   naled an active connection and the corresponding B-channel
                   is switched through.
           MSG_DISCONNECT_IND
                   A call was terminated.
           MSG_DIALOUT_IND
                   A userland interface driver requests the daemon to dial out
                   (typically a network interface when a packet arrives in its
                   send queue).
           MSG_IDLE_TIMEOUT_IND
                   A call was terminated by the isdn4bsd kernel driver because
                   a B-channel idle timeout occurred.
           MSG_ACCT_IND
                   Accounting information from a network driver.
           MSG_CHARGING_IND
                   Charging information from the kernel.

SEE ALSO
     isdnd(8)

AUTHORS
     The isdn device driver and this man page were written by Hellmuth
     Michaelis <hm@kts.org>.

NetBSD 5.0.1                   February 3, 1998                   NetBSD 5.0.1

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