ZyXEL Communications ACCESSING INTERNET & INTRANET omni series - Manual (Page 60)

48 Point-to-Point Protocol (PPP)
traffic for BOD is still under calculation. In other words, the add
persist time is calculated from the time when the traffic is above the
add threshold whether or not the phone is on-hook or off-hook.
However, it won’t dial until the phone has been on-hook for 10
seconds.
Call bumping works for both client (dialing) side and server
(answering) side. However, the channel reestablishment is only
effective on the client side.
Related commands:
ATCE0 - Disable the call bumping function.
ATCE1 - Enable the call bumping function (default).
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).