A communication control mechanism installable in the communications controller
of an ISDN terminal adapter is operative to conduct in-band communications with
its digital terminal device during an internet communication session between the
digital terminal device and a digital communication network interface of an internet
service provider. The terminal adapter monitors the data link establishment communication
exchange between the network access server and the personal computer, to identify
and capture internet protocol addresses for the digital terminal device and the
network access interface. These addresses are then used by the terminal adapter
to communicate in-band with the digital terminal device using user datagram protocol
(UDP)-based messages.
