52
C
HAPTER
5: C
ONFIGURING
THE
R
OUTER
such as traditional computer communications applications. The
UBR service may be considered as "best effort service".
■
VBR (variable bit rate): QoS class defined by the ATM Forum for
ATM networks. VBR is subdivided into a real time (RT) class and
non-real time (NRT) class. VBR (RT) is used for connections in which
there is a fixed timing relationship between samples. VBR (NRT) is
used for connections in which there is no fixed timing relationship
between samples, but that still need a guaranteed QoS. Compare
with ABR, CBR, and UBR.
5
Enter the PCR/SCR/MBS values.
6
Click
Apply
.
Routing Mode over ATM (RFC 1483 Routed Mode)
This mode is commonly used with either dynamic or static IP addressing.
In this mode the WAN ADSL port will be configured with an IP address
provided by the ISP. To configure this page correctly, you should obtain
the information on this page from your ISP.
Figure 41
Routing Mode over ATM Screen
After clicking Edit on the ATM PVC page, the ATM Interface page
appears.
1
Select
Routing Mode over ATM
from the
Protocol
drop-down menu.
2
Enter the IP address, Subnet Mask and Default Gateway information
provided by your ISP into the
IP address
,
Subnet Mask
and
ISP Default
Gateway
fields.
3
Enter the VPI and VCI parameters provided to you by your ISP in the
VPI
and
VCI
fields.
