User Manual

Wireless ADSL2+ Router User’s Guide
69
VPI
Virtual Path Identifier. This is read-only field and is
selected on the Select column in the Current ATM VC
Table.
VCI
Virtual Channel Identifier. This is read-only field and is
selected on the Select column in the Current ATM VC
Table. The VCI, together with VPI, is used to identify
the next destination of a cell as it passes through to the
ATM switch.
QoS
Quality of Server, a characteristic of data transmission
that measures how accurately and how quickly a
message or data is transferred from a source host to a
destination host over a network. The four QoS options
are:
−UBR (Unspecified Bit Rate): When UBR is selected,
the SCR and MBS fields are disabled.
−CBR (Constant Bit Rate): When CBR is selected, the
SCR and MBS fields are disabled.
−nrt-VBR (non-real-time Variable Bit Rate): When nrt-
VBR is selected, the SCR and MBS fields are enabled.
−rt-VBR (real-time Variable Bit Rate): When rt-VBR is
selected, the SCR and MBS fields are enabled.
PCR
Peak Cell Rate, measured in cells/sec., is the cell rate
which the source may never exceed.
SCR
Sustained Cell Rate, measured in cells/sec., is the
average cell rate over the duration of the connection.
MBS
Maximum Burst Size, a traffic parameter that specifies
the maximum number of cells that can be transmitted
at the peak cell rate.
Function Button Description
Apply Changes
Set new PVC OoS mode for the selected PVC. New
parameters will take effect after save into flash
memory and reboot the system. See section “Admin”
for save details.
Undo Discard your settings.