ZyXEL Communications Prestige 645R-A Series, User Manual, Page: 40 / 251

Prestige 645R-A Series User’s Guide
4-4 Wizard Setup
Table 4-1 Wizard Screen 1
LABEL DESCRIPTION
Virtual Circuit
ID VPI (Virtual Path Identifier) and VCI (Virtual Channel Identifier) define a virtual circuit. Refer to
the appendix
for more information.
VPI Enter the VPI assigned to you. This field may already be configured.
VCI Enter the VCI assigned to you. This field may already be configured.
ATM QoS
Type 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.
Cell Rate Cell rate configuration often helps eliminate traffic congestion that slows transmission of real
time data such as audio and video connections.
Peak Cell Rate 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 here.
Sustain Cell
Rate
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.
Maximum
Burst Size
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.
Next Click this button to go to the next wizard screen. The next wizard screen you see depends on
what protocol you chose above. Click on the protocol link to see the next wizard screen for
that protocol.
4.6 IP Address and Subnet Mask
Similar to the way houses on a street share a common street name, so too do computers on a LAN share one
common network number.
Where you obtain your network number depends on your particular situation. If the ISP or your network
administrator assigns you a block of registered IP addresses, follow their instructions in selecting the IP
addresses and the subnet mask.
If the ISP did not explicitly give you an IP network number, then most likely you have a single user account
and the ISP will assign you a dynamic IP address when the connection is established. If this is the case, it is
recommended that you select a network number from 192.168.0.0 to 192.168.255.0 and you must enable the