The Advanced Screen - ZyXEL Communications VMG1312-B Series User Manual

Chapter 6 Broadband
Table 11 Net work Set t ing > Broadband > 3G Backup ( cont inued)
LABEL
Apply
Cancel

6.4 The Advanced Screen

Use t he Adva nce d screen t o enable or disable PTM over ADSL, Annex M/ Annex J, and DSL PhyR
funct ions. The Device support s t he PhyR ret ransm ission schem e. PhyR is a ret ransm ission schem e
designed t o provide prot ect ion against noise on t he DSL line. I t im proves voice, video and dat a
t ransm ission resilience by ut ilizing a ret ransm ission buffer.
Click N e t w or k Se t t in g > Br oa dba nd > Adva nce d t o display t he following screen.
Figure 24 Net work Set t ing > Broadband > Advanced ( VMG1312- B10A)
Figure 25 Net work Set t ing > Broadband > Advanced ( VMG1312- B30A)
The following t able describes t he labels in t his screen.
Table 12 Net work Set t ing > Net work Set t ing > Broadband
LABEL
PTM over ADSL
Annex M
Annex J
PhyR US
98
DESCRIPTION
Click Apply t o save your changes back t o t he Device.
Click Ca nce l t o ret urn t o t he previous configurat ion.
DESCRIPTION
Select En a ble t o use PTM over ADSL. Since PTM has less overhead t han ATM, som e I SPs
use PTM over ADSL for bet t er perform ance.
You can enable An n e x M or Ann e x J for t he Device t o use double upst ream m ode t o
increase t he m axim um upst ream t ransfer rat e.
Enable or disable Ph yR US ( upst ream ) for upst ream t ransm ission t o t he WAN. PhyR US
should be enabled if dat a being t ransm it t ed upst ream is sensit ive t o noise. However,
enabling PhyR US can decrease t he US line rat e. Enabling or disabling PhyR will require t he
CPE t o ret rain. For PhyR t o funct ion, t he DSLAM m ust also support PhyR and have it
enabled.
VMG1312-B Series User's Guide