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
messages with the ISDN kernel part for the purpose of call establishment,
control and disconnection and to access various control and status
information.
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
outgoing call has been accepted by a remote, the exchange signaled 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>.