Zyxel-communications P-660H-D Series Uživatelský manuál stáhnout pdf (Strana 75)

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P-660R/H-D Series User’s Guide

Chapter 6 WAN Setup 74

Sustained Cell Rate (SCR) is the mean cell rate of each bursty traffic source. It specifies the

maximum average rate at which cells can be sent over the virtual connection. SCR may not be

greater than the PCR.

Maximum Burst Size (MBS) is the maximum number of cells that can be sent at the PCR.

After MBS is reached, cell rates fall below SCR until cell rate averages to the SCR again. At

this time, more cells (up to the MBS) can be sent at the PCR again.

If the PCR, SCR or MBS is set to the default of "0", the system will assign a maximum value

that correlates to your upstream line rate.

The following figure illustrates the relationship between PCR, SCR and MBS.

Figure 22 Example of Traffic Shaping

6.5 Zero Configuration Internet Access

Once you turn on and connect the Prestige to a telephone jack, it automatically detects the

Internet connection settings (such as the VCI/VPI numbers and the encapsulation method)

from the ISP and makes the necessary configuration changes. In cases where additional

account information (such as an Internet account user name and password) is required or the

Prestige cannot connect to the ISP, you will be redirected to web screen(s) for information

input or troubleshooting.

Zero configuration for Internet access is disable when

• the Prestige is in bridge mode

• you set the Prestige to use a static (fixed) WAN IP address.

6.6 The Main WAN Screen

Click WAN in the navigation panel to display the man WAN screen.

See Section 6.1 on page 70 for more information.

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