ZyXEL Communications IES-1000 User Manual page 131

LABEL
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 rt-vbr (real time variable bit rate) or nrt-vbr (non real time variable bit rate) for bursty
traffic and bandwidth sharing with other applications. Select abr (available bit rate) for file
transfers and other bursty, non-real time traffic.
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. PCR applies with all of the ATM
traffic classes. Type the PCR here.
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/MCR 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 rt-vbr and nrt-vbr
traffic classes.
Minimum Cell Rate (MCR) is the minimum rate at which the sender can send cells. MCR
applies with the abr traffic class.
BT/NRM 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 rt-vbr and nrt-vbr traffic classes.
The Number of Resource Management (NRM) cells sets the maximum number of cells a
source may send for each forward Resource Management cell. Type the NRM here. NRM
applies with the abr traffic class.
Add Click this button to configure a new channel.
Delete Select a channel's Delete check box and click the Delete button to remove the channel.
13.4.4 DSL Port Channel Add or Edit Screen
Do the following to open the DSL Port Channel Add or Edit screen:
Click a DSL port's index number in the Port Setup screen to go to the DSL Port Setup screen
Step 1.
Click Channel Setup in the DSL Port Setup screen to go to the port's Channel Setup screen.
Step 2.
Click the Add button in the Channel Setup screen to add a new channel or click an existing channel's
Step 3.
link in the VPI/VCI column to edit the channel.
Virtual Channel Management
Table 13-3 DSL Port VC Profile Add
DESCRIPTION
IES-1000 User's Guide
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