ZyXEL Communications SAM1316-22, User Manual

Page: 115 / 464

Chapter 14 xDSL Profiles Setup
SAM1316-22 User’s Guide
115
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.
Name When editing a profile, this is the name of this profile. When adding a
profile, type a name for the profile. You can use up to 31 ASCII
characters; spaces are not allowed.
Encap Select the encapsulation type (LLC or VC) for this port.
Class Select CBR (constant 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 VBR
(real time variable bit rate) or NRT-VBR (non real time variable bit
rate) for bursty traffic and bandwidth sharing with other applications.
PCR The Peak Cell Rate (PCR) is the maximum rate at which the sender
can send cells. PCR applies with all of the ATM traffic classes. You can
type a number of (ATM) cells per second in the first field or type a
number of kilobytes per second in the second field to have the system
automatically compute the number of ATM cells per second.
CDVT Cell Delay Variation Tolerance (CDVT) is the accepted tolerance of the
difference between a cell’s transfer delay and the expected transfer
delay. CDVT applies with all of the ATM traffic classes. Type the CDVT
here.
SCR The Sustained Cell Rate (SCR) sets the average cell rate (long-term)
that can be transmitted. Type the SCR, which must be less than the
PCR. SCR applies with the VBR traffic classes. You can type a number
of (ATM) cells per second in the first field or type a number of
kilobytes per second in the second field to have the system
automatically compute the number of ATM cells per second.
BT Burst Tolerance (BT) sets a maximum number of cells that the port is
guaranteed to handle without any discards. Type the BT here. BT
applies with the VBR traffic classes.
Add Click Add to save your changes to the SAM1316-22’s volatile
memory. The SAM1316-22 loses these changes if it is turned off or
loses power, so use the Config Save link on the navigation panel to
save your changes to the non-volatile memory when you are done
configuring.
Cancel Click Cancel to start configuring the screen again.
Table 25 VC Profile (continued)
LABEL DESCRIPTION