D-Link DI-206 - Manual (Page 118)

DI-206 ISDN Remote Router
106 Configuration and
Management
connection when the BOD High Threshold is exceeded for the Add
Bandwidth Delay period. Bandwidth can also be subtracted when
ISDN throughput falls below the BOD Low Threshold and Subtract
Bandwidth Delay parameters. Thus, BOD economizes MLPPP by
maintaining only the bandwidth needed.
A static implementation of MLPPP is achieved when BOD is disabled
but the ISDN ports have Multi-Link enabled. In this case, when the
two ISDN ports have established a connection, the router will check to
see if they are connected to the same source and whether the source
supports MLPPP. If both conditions are met, the router will
automatically bundle the two links together as an MLPPP connection.
Choosing Multi-Link PPP Configuration displays the following
screen: