Zyxel VMG1312-B10B [91/394] The advanced screen

Zyxel VMG1312-B10B [91/394] The advanced screen
Chapter 6 Broadband
VMG1312-B10B / VMG1312-B30B Series User’s Guide
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6.4 The Advanced Screen
Use the Advanced screen to enable or disable PTM over ADSL, Annex M/Annex J, 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.
Click Network Setting > Broadband > Advanced to display the following screen.
Figure 24 Network Setting > Broadband > Advanced (VMG1312-B10B)
Figure 25 Network Setting > Broadband > Advanced (VMG1312-B30B)
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 11 Network Setting > Broadband > 3G Backup (continued)
LABEL DESCRIPTION
Table 12 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.
Annex M
Annex J
You can enable Annex M or Annex J for the Device to use double upstream mode to
increase the 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.

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