The Advanced Screen - ZyXEL Communications VMG3312-T20A User Manual

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.
Table 15 VDSL Profiles
PROFILE
8a
8b
8c
8d
12a
12b
17a
30a
Click Network Setting > Broadband > Advanced to display the following screen.
Figure 33 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
30 3479
VMG3312-T20A User's Guide
CARRIER
BANDWIDTH
(KHZ)
4.3125
4.3125
4.3125
4.3125
4.3125
4.3125
4.3125
8.625
89
MAX.
DOWNSTREAM
POWER (DBM)
THROUGHPUT
(MBIT/S)
17.5 50
20.5 50
11.5 50
14.5 50
14.5 68
14.5 68
14.5 100
14.5 200