ZyXEL Communications P-660R-11V3 User Manual

Chapter 7 Internet Setup

P-660R-T1 v3 User’s Guide

In the Interface Setup > Internet screen, select Dynamic IP Address from the ISP field to 
display the following screen.

Figure 22   Interface Setup > Internet (Dynamic IP)

ATM QoS

Select CBR (Continuous Bit Rate) to specify fixed (always-on) bandwidth for 

voice or data traffic. Select UBR (Unspecified Bit Rate) for applications that are 

non-time sensitive, such as e-mail. Select rtVBR (real-time Variable Bit Rate) for 

applications with bursty connections that require closely controlled delay and 

delay variation. Select nrtVBR (non real-time Variable Bit Rate) for connections 

that do not require closely controlled delay and delay variation.

PCR

Divide the DSL line rate (bps) by 424 (the size of an ATM cell) to find the Peak 

Cell Rate (PCR). This is the maximum rate at which the sender can send cells. 

Type the PCR in this field.

SCR

The Sustain Cell Rate (SCR) sets the average cell rate (long-term) that can be 

transmitted. Type the SCR, which must be less than the PCR. Note that system 

default is 0 cells/sec. 

MBS

Maximum Burst Size (MBS) refers to the maximum number of cells that can be 

sent at the peak rate. Type the MBS, which is less than 65535. 

Encapsulation

Select the connection type supported by your ISP. The next fields vary 

depending on what connection type you use. See the following sections for more 

details.

SAVE

Click this to save your changes.

DELETE

Click this to restore the PVC to default settings.

Table 11   Interface Setup > Internet (continued)