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6.4 The Advanced Screen
Use the Advanced screen to enable or disable ADSL over PTM, 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.
Table 12 VDSL Profiles
PROFILE
8a
8b
8c
8d
12a
12b
17a
Click Network Setting > Broadband > Advanced to display the following screen.
Figure 30 Network Setting > Broadband > Advanced
Chapter 6 Broadband
NUMBER OF
BANDWIDTH
DOWNSTREAM
(MHZ)
CARRIERS
8.832
2048
8.832
2048
8.5
1972
8.832
2048
12
2783
12
2783
17.664
4096
VMG3925-B10C/B30C User's Guide
CARRIER
BANDWIDTH
(KHZ)
4.3125
4.3125
4.3125
4.3125
4.3125
4.3125
4.3125
92
MAX.
DOWNSTREAM
POWER (DBM)
THROUGHPUT
(MBIT/S)
17.5
20.5
11.5
14.5
14.5
14.5
14.5
50
50
50
50
68
68
100
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