ZyXEL Communications Prestige 128IMH, Руководство пользователя, Страница: 54 / 142

ZyXEL Prestige 128IMH User’s Guide
Page 6-6
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When bandwidth on demand is enabled, a second channel will be brought up if traffic on the
initial channel is higher than the high Target Utility number for longer than the specified
Add Persist value. Similarly, the second channel will be dropped if the traffic level falls
below the low Target Utility number for longer than the Subtract Persist value.
The Target Utility specifies the line utilization range at which you want the Prestige to add
or subtract bandwidth. The range is 30 to 64 kbps (kilobits per second). The parameters are
separated by a ‘-’. For example, ‘30-60’ means the add threshold is 60 kbps and subtract
threshold is 30 kbps. The Prestige performs bandwidth on demand only if it initiates the call.
Addition and subtraction are based on the value set in the BOD Calculation field. If this
field is set to Transmit or Receive, then traffic in either direction will be calculated to
determine if a link should be added or dropped. Transmit will only use outgoing traffic to
make this determination and Receive will only use incoming traffic to make this
determination.
If, after making the call to bring up a second channel, the second channel does not succeed
in joining the Multilink Protocol bundle (because the remote device does not recognize the
second call as coming from the same device), the Prestige will hang up the second channel
and continue with the first channel alone.
6.2. Editing PPP Options
Selecting Yes to the Edit PPP Options in Menu 11.1 - Remote Node Profile above
displays the screen below which allows you to configure your Remote Node PPP options.
Figure 6-1 Remote Node PPP Options
Menu 11.2 - Remote Node PPP Options
Encapsulation= Standard PPP
Compression= No
Multiple Link Options:
BOD Calculation= Transmit or Receive
Base Trans Rate(Kbps)= 64
Max Trans Rate(Kbps)= 64
Target Utility(Kbps)= 32-48
Add Persist(sec)= 5
Subtract Persist(sec)= 5
Enter here to CONFIRM or ESC to CANCEL:
Press Space Bar to Toggle.