DIVA T/A ISDN Modem User’s Guide ◆ Page 46
The DIVA Terminal Adapters Program for Windows95/98/NT
BACP Tab
This tab is visible only if the data protocol is set to ‘MultiLink PPP with BACP’ or ‘MultiLink PPP
with AODI’.
BACP activates the DIVAT/A’s automatic traffic monitor for M ultilink PPP connections. When
activated, this DIVAT/A function monitors the send-and-receive traffic volume. BACP opens
or closes the second B-channel as the traffic volume warrants. Activate this function to
ensure that two B-channels are never active when one is sufficient.
With AO/DI support, when additional ba ndwidth is required, BACP automatically adds
B-channels of 64 Kbps each (for a total of 128 Kbps speed when both B-channels are in use)
to the connection. When the additional bandwidth is no longer required, one or both
B-channels are dropped, leaving the D-channel connection in place.
Note: If you select Bandwidth Allocation Control Protocol, but do not set the timers, you
could incur unnecessary expense as you r second B-channel may open and close frequently,
costing you the set first-interval amount each time the second B-channel connects.
ISDN Cost Reduction Timers
Set the ISDN Cost Reduction Timers if you intend to establish Multilink PPP connections and
if you select the Bandwidth Allocation Control Protocol (described above). The ISDN Cost
Reduction Timers combine with the Bandwidth Allocation Control Protocol to ensure you the
most cost-efficient use of ISDN online time. With the timers set, the DIVA T/A will not connect
and disconnect your second B-channel, except when it is most economical to do so.
If your ISDN provider charges one rate for the first interval of time online, and a different rate
for any subsequent time online, select the appropriate Initial Billing Interval (in seconds) to
match the amount of time your ISDN provider allocates as the first time interval. Select the
appropriate Billing Interval to match the amount of time your ISDN provider designates as
the minimum chargeable unit for all subsequent billing.