Draytek Vigor2500V Manual page 143

These parameters are activated when you set the Link Type to Dialup
BOD. Usually the ISDN will use one B channel to access the Internet or
remote network when you use the Dialup BOD link type. The router will
use the parameters here to make a decision on when you activate/drop
the additional B channel.
measures the total link utilization.
High Water Mark and High Water Time: These parameters specify the
condition that the second channel will be activated.
connected channel, if its utilization exceeds the High Water Mark and
such a channel is used over the High Water Time, the additional channel
will be activated. Thus, the total link speed will be 128kbps (two B
channels).
Low Water Mark and Low Water Time: These parameters specify the
condition for dropping the second channel.
channels, if their utilization is under the Low Water Mark and these two
channels are used over the High Water Time, the additional channel will
be dropped. As a result, the link speed will be 64kbps (one B channel).
If you are not sure whether your ISP can support BOD and/or ML-PPP's
operations, please firstly get advice from your ISP or local dealers or
support@draytek.com
Call Control
Note that cps (characters-per-second)
.
15-4
With the first
Considering the two B