Bandwidth On Demand (Bod); Bacp/Bap - ZyXEL Communications omni TA128 User Manual

Bandwidth On Demand (BOD)

The function of bandwidth on demand (BOD) will monitor the
traffic on ISDN links while Multilink PPP. If there is light traffic on
the link, one of the channels will be dropped automatically. On the
other hand, if only one B channel is used and data traffic is high
enough, BOD will establish the second B channel to increase the
bandwidth of the data link. The wait for the second B channel's
carrier is 60 seconds. If the second B channel can't be connected
successfully the BOD will try again after 60 seconds. If the second
call is connected but negotiation failed, it will be retry three times.
If a connection is not established after the third try the Multilink
PPP will be disabled automatically.
For BOD, there are four parameters to set high/low threshold and
persist time. Traffic utilization is measured in the ISDN link. Highly
compressible data may not generate enough traffic to start the
second B channel. Both add persist time and subtract persist time
must be set to activate BOD.
Related commands:
ATJAn - Add traffic threshold for n K bits per second, n = 48
(default).
ATJSn - Subtract traffic threshold for n K bits per second, n =
32 (default).
ATKAmn - Add persist time for n period in m unit, n = 0 - 127,
m = s for seconds and m for minutes.
ATKSmn - Subtract persist time for n period in m unit, n = 0 -
127, m = s for seconds and m for minutes.

BACP/BAP

Bandwidth Allocation Control Protocol and Bandwidth Allocation
Protocol is used for call request and link drop under Multilink PPP.
BACP is negotiated during the network phase. Without
BACP/BAP, the directory numbers of both B channels must be
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