ZyXEL VMG9823 User Guide - Page 76

Table 12, Label, Description

Page 76 highlights

Chapter 6 Broadband Figure 25 Network Setting > Broadband > Advanced The following table describes the labels in this screen. Table 12 Network Setting > Broadband > Advanced LABEL DSL Capabilities PhyR US PhyR DS Bitswap DESCRIPTION Enable or disable PhyR US (upstream) for upstream transmission to the WAN. PhyR US should be enabled if data being transmitted upstream is sensitive to noise. However, enabling PhyR US can decrease the US line rate. Enabling or disabling PhyR will require the CPE to retrain. For PhyR to function, the DSLAM must also support PhyR and have it enabled. Enable or disable PhyR DS (downstream) for downstream transmission from the WAN. PhyR DS should be enabled if data being transmitted downstream is sensitive to noise. However, enabling PhyR DS can decrease the DS line rate. Enabling or disabling PhyR will require the CPE to retrain. For PhyR to function, the DSLAM must also support PhyR and have it enabled. Select Enable to allow the VMG to adapt to line changes when you are using G.dmt. SRA ADSL Modulation PTM over ADSL Bit-swapping is a way of keeping the line more stable by constantly monitoring and redistributing bits between channels. Enable or disable Seamless Rate Adaption (SRA). Select Enable to have the VMG automatically adjust the connection's data rate according to line conditions without interrupting service. Select Enable to use PTM over ADSL. Since PTM has less overhead than ATM, some ISPs use this for better performance. VMG9823-B10A User's Guide 76

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Chapter 6 Broadband
VMG9823-B10A User’s Guide
76
Figure 25
Network Setting
>
Broadband > Advanced
The following table describes the labels in this screen.
Table 12
Network Setting
>
Broadband > Advanced
LABEL
DESCRIPTION
DSL
Capabilities
PhyR US
Enable or disable
PhyR US
(upstream) for upstream transmission to the WAN. PhyR US
should be enabled if data being transmitted upstream is sensitive to noise. However,
enabling PhyR US can decrease the US line rate. Enabling or disabling PhyR will require the
CPE to retrain. For PhyR to function, the DSLAM must also support PhyR and have it
enabled.
PhyR DS
Enable or disable
PhyR DS
(downstream) for downstream transmission from the WAN.
PhyR DS should be enabled if data being transmitted downstream is sensitive to noise.
However, enabling PhyR DS can decrease the DS line rate. Enabling or disabling PhyR will
require the CPE to retrain. For PhyR to function, the DSLAM must also support PhyR and
have it enabled.
Bitswap
Select
Enable
to allow the VMG to adapt to line changes when you are using G.dmt.
Bit-swapping is a way of keeping the line more stable by constantly monitoring and
redistributing bits between channels.
SRA
Enable or disable Seamless Rate Adaption (SRA). Select
Enable
to have the VMG
automatically adjust the connection’s data rate according to line conditions without
interrupting service.
ADSL
Modulation
PTM over ADSL
Select
Enable
to use PTM over ADSL. Since PTM has less overhead than ATM, some ISPs
use this for better performance.