ZyXEL Communications IES-1248-51, Руководство пользователя

Страница: 134 / 385

IES-1248-51 User’s Guide
134 Chapter 17 xDSL Profiles Setup
Figure 65 VC Profile
The following table describes the labels in this screen.
Table 23 VC Profile
LABEL DESCRIPTION
Port Profile Click Port Profile to configure port profiles and assign them to individual ports
(see Section 17.1 on page 127 ).
Alarm Profile Click Alarm Profile to open the Alarm Profile screen where you can configure
limits that trigger an alarm when exceeded (see Section 17.6 on page 135 )
IGMP Filter Profile Click IGMP Filter Profile to open the IGMP Filter Profile screen where you can
configure IGMP multicast filter profiles (see Section 17.8 on page 138 ).
Index This is the number of the VC profile.
Name This name identifies the VC profile.
Encap This field displays the profile’s type of encapsulation ( llc or vc ).
AAL This field displays the ATM adaptation layer used by the VC profile.
aal5 - The VC profile uses ATM adaptation layer 5.
Class This field displays the type of ATM traffic class: cbr (constant bit rate), vbr (real-
time variable bit rate), nrt-vbr (non-real time variable bit rate) or ubr
(unspecified bit rate).
PCR This is the Peak Cell Rate (PCR), the maximum number of cells that the sender
can send per second.
CDVT This field displays the accepted tolerance of the difference between a cell’s
transfer delay and the expected transfer delay.
SCR The Sustained Cell Rate (SCR) sets the average cell rate (long-term) in cells per
second that can be transmitted. SCR applies with the vbr traffic class.
BT Burst Tolerance (BT) is the maximum number of cells that the port is guaranteed
to handle without any discards. BT applies with the vbr traffic class.
Select
Modify Select a VC profile’s Select radio button and click Modify to edit the VC profile
Delete Select a VC profile’s Select radio button and click Delete to remove the VC
profile
The rest of the screen is for PVC configuration.