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ALC1224 User’s Guide
4-8
Virtual Channel Management
Table 4-3 ADSL Port VC Profile Edit
LABEL DESCRIPTION
VC Profile Setup
Click this link to go to the
VC Profile
Setup
screen.
Profile Name
When editing a profile, this is the name of this profile. When adding a profile, type a name for
the profile.
Encap.
Select the encapsulation type (
LLC
or
VC
) for this port.
AAL
The ALC1224 supports ATM Adaptation Layer 5.
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
(variable bit rate) for bursty traffic and bandwidth sharing with other applications.
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
vbr
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
vbr
traffic class.
Apply
Click
Apply
to save your changes.
Reset
Click
Reset
to begin configuring this screen afresh.
4.4.4
ADSL Port Channel Add or Edit Screen
Do the following to open the
ADSL Port Channel Add
or
Edit
screen:
1.
Click an ADSL port's index number in the
Port Setup
screen to go to the
ADSL Port Setup
screen
2.
Click
Channel Setup
in the
ADSL Port Setup
screen to go to the port's
Channel Setup
screen.
3.
Click the
Add
button in the
Channel Setup
screen to add a new channel or click an existing channel’s link
in the
VPI/VCI
column to edit the channel.
Summary of Contents for ALC1224
Page 1: ...ALC1224 ADSL Line Card Version 3 50 LK 0 LV 0 August 2004 User s Guide...
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Page 38: ...ALC1224 User s Guide 2 6 Web Configurator Introduction Figure 2 6 ALC Edit Port Setup...
Page 68: ...ALC1224 User s Guide 4 10 Virtual Channel Management...
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Page 129: ...Index V Part V Index This part provides an index of important terms...
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Page 136: ...ALC1224 User s Guide F Index X XMODEM upload 9 2...