Provided by:
freebsd-manpages_6.2-1_all 
NAME
i4bing - isdn4bsd NetGraph ISDN B-channel interface driver
SYNOPSIS
device "i4bing" [count]
DESCRIPTION
The i4bing driver interfaces the FreeBSD NetGraph subsystem with the
isdn4bsd package.
The driver just packs packets received from the NetGraph subsystem
without anything appended or prepended into raw HDLC packets on the B
channel and transfers them to a remote site. Packets received from the
remote site are queued into the NetGraph subsystem.
In the case where a packet for a remote site arrives in the driver and no
connection has been established yet, the driver communicates with the
isdnd(8) daemon to establish a connection.
SEE ALSO
netgraph(4), isdnd.rc(5), isdnd(8)
AUTHORS
The i4bing device driver and this manpage were written by Hellmuth
Michaelis 〈hm@FreeBSD.org〉.