ZyXEL Communications Corporation VMG1312B10C Manuel D’Utilisation
Chapter 5 Broadband
VMG1312-B10C User’s Guide
55
5.4 The Advanced Screen
Use the Advanced screen to enable or disable PTM over ADSL, Annex M, and DSL PhyR functions.
The Device supports the PhyR retransmission scheme. PhyR is a retransmission scheme designed to
provide protection against noise on the DSL line. It improves voice, video and data transmission
resilience by utilizing a retransmission buffer.
The Device supports the PhyR retransmission scheme. PhyR is a retransmission scheme designed to
provide protection against noise on the DSL line. It improves voice, video and data transmission
resilience by utilizing a retransmission buffer.
Click Network Setting > Broadband > Advanced to display the following screen.
Figure 23
Network Setting > Broadband > Advanced
The following table describes the labels in this screen.
Apply
Click Apply to save your changes back to the Device.
Cancel
Click Cancel to return to the previous configuration.
Table 10
Network Setting > Broadband > 3G Backup (continued)
LABEL
DESCRIPTION
Table 11
Network Setting > Network Setting > Broadband
LABEL
DESCRIPTION
PTM over ADSL
Select Enable to use PTM over ADSL. Since PTM has less overhead than ATM, some ISPs
use PTM over ADSL for better performance.
use PTM over ADSL for better performance.
Annex M
You can enable Annex M for the Device to use double upstream mode to increase the
maximum upstream transfer rate.
maximum upstream transfer rate.
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.
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.
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.
Apply
Click Apply to save your changes back to the Device.
Cancel
Click Cancel to return to the previous configuration.