9.1.1 The Maximum Bandwidth provided by ISP
In the boxes for WAN1 and WAN2 bandwidth, input the upstream and downstream bandwidth which
users applied for from bandwidth supplier. The bandwidth QoS will make calculations according to the data
users input. In other words, it will guarantee a minimum rate of upstream and downstream for each IP and
Service Port based on the total actual bandwidth of WAN1 and WAN2. For example, if the upstream
bandwidths of both WAN1 and WAN2 are 512Kbit/Sec, the total upstream bandwidth will be: WAN1 + WAN2 =
1024Kbit/Sec. Therefore, if there are 50 IP addresses in the Intranet, the minimum guaranteed upstream
bandwidth for each IP would be 1024Kbit/50=20Kbit/Sec. Thus, 20Kbit/Sec can be input for “Mini. Rate”
Downstream bandwidth can be calculated in the same way.
Attention！
The unit of calculation in this example is Kbit. Some software indicates the downstream/upstream speed
with the unit KB. 1KB = 8Kbit.
9.1.2 QoS
To satisfy the bandwidth requirements of certain users, the device enables users to set up QoS: Rate Control and
Priority Control. Users can select only one of the above QoS choices.
Rate Control：
The network administrator can set up bandwidth or usage limitations for each IP or IP range according to the
actual bandwidth. The network administrator can also set bandwidth control for certain Service Ports. A
guarantee bandwidth control for external connections can also be configured if there is an internal server.
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