If you have problems setting up BNU connections
to or from a remote serial port,
or if
cu(1bnu)
or
uucp(1bnu)
appear to hang
once a connection is established,
your problem may be caused by one of the following conditions:
a problem with the communications line itself
a problem with the modem configuration or the line configuration
a problem with the configuration of the daemons
that manage serial communications