ZyXEL Communications VMG1312-B Series - 6.4 The Advanced Screen

Chapter 6 Broadband
VMG1312-B Series User’s Guide
98
6.4 The Advanced Screen
Use t he Advanced screen to enable or disable PTM over ADSL, Annex M/ Annex J, and DSL PhyR
funct ions. The Device support s t he PhyR retransm ission schem e. PhyR is a ret ransm ission schem e
designed t o provide prot ection against noise on t he DSL line. I t im proves voice, video and dat a
transm ission resilience by ut ilizing a retransm ission buffer.
Click Ne t w or k Set t in g > Broadband > Adva nced to display t he following screen.
Figure 24 Net work Sett ing > Broadband > Advanced ( VMG1312-B10A)
Figure 25 Net work Sett ing > Broadband > Advanced ( VMG1312-B30A)
The following t able describes t he labels in t his screen.
Apply Click Apply to save your changes back t o t he Device.
Cancel Click Ca nce l to return to t he previous configurat ion.
Table 11 Network Sett ing > Broadband > 3G Backup ( continued)
LABEL DESCRIPTION
Table 12 Network Sett ing > Net w ork Set ting > Broadband
LABEL DESCRIPTION
PTM over ADSL Select Enable to use PTM over ADSL. Since PTM has less overhead t han ATM, som e I SPs
use PTM over ADSL for bett er perform ance.
Annex M
Annex J
Yo u can e n ab l e An n e x M or Annex J for the Device t o use double upst ream m ode to
increase the m axim um upstream transfer rat e.
PhyR US Enable or disable Ph yR US ( upstream ) for upst ream transm ission to t he WAN. PhyR US
should be enabled if dat a being transm it ted upstream is sensit ive t o noise. However,
enabling PhyR US can decrease t he US line rat e. Enabling or disabling PhyR will require the
CPE to retrain. For Phy R to funct ion, t he DSLAM m ust also support PhyR and have it
enabled.