Operation Manual

19
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.
CDVT Cell Delay Variation Time. The Cell Delay Variation is a term used in ATM (Asynchronous
Transfer Mode) to describe the time difference that is acceptable between cells being
presented at the receiving host. Available only when VBR QoS is chosen.
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.
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.
The ADSL setting page allows you to select any combination of DSL training modes.
Fields in this page:
Field Description
ADSL modulation Choose prefered xdsl standard protocols.
G.lite : G.992.2 Annex A
G.dmt : G.992.1 Annex A
T1.413 : T1.413 issue #2
ADSL2 : G.992.3 Annex A
ADSL2+ : G.992.5 Annex A
AnnexL Option Enable/Disable ADSL2/ADSL2+ Annex L capability.
AnnexM Option Enable/Disable ADSL2/ADSL2+ Annex M capability.
ADSL Capability “Bitswap Enable” : Enable/Disable bitswap capability.
“SRA Enable” : Enable/Disable SRA (seamless rate adaptation) capability.
ADSL Settings