Chapter 6 Broadband
VMG3312-T20A User’s Guide
89
6.4 The Advanced Screen
Use the Advanced screen to enable or disable Annex M, DSL PhyR, and SRA (Seamless Rate Adaptation)
functions. The VMG 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.
ITU-T G.993.2 standard defines a wide range of settings for various parameters, some of which are
encompassed in profiles as shown in the next table.
Click Network Setting > Broadband > Advanced to display the following screen.
Figure 33 Network Setting > Broadband > Advanced
Table 15 VDSL Profiles
PROFILE
BANDWIDTH
(MHZ)
NUMBER OF
DOWNSTREAM
CARRIERS
CARRIER
BANDWIDTH
(KHZ)
POWER (DBM)
MAX.
DOWNSTREAM
THROUGHPUT
(MBIT/S)
8a 8.832 2048 4.3125 17.5 50
8b 8.832 2048 4.3125 20.5 50
8c 8.5 1972 4.3125 11.5 50
8d 8.832 2048 4.3125 14.5 50
12a 12 2783 4.3125 14.5 68
12b 12 2783 4.3125 14.5 68
17a 17.664 4096 4.3125 14.5 100
30a 30 3479 8.625 14.5 200
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