Zyxel VES-1624FT-55A [109/312] Chapter 16 xdsl port setup

Chapter 16 xDSL Port Setup

VES-1624FT-55A User’s Guide

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Optionmask Click the link to display the following screen where you can configure the

optional band PSD mask.

1. Select which setting(s) you want to apply to the option mask. Select ALL to

select every setting and click it again to clear all of the check boxes.

2. See the configured result in the Current Option mask is field.

3. Click Apply to go back to the xDSL Port Setting screen.

Figure 50 Optionmask options

RFI Band RFI is induced noise on the lines by surrounding radio frequency

electromagnetic radiation from sources such as AM and HAM radio stations. To

avoid performance degradation due to RFI, set the IP DSLAM to not transmit

VDSL signals in the RFI band defined by the regulatory bodies such as ETSI

(etsi) or ANSI (ansi). You can also configure your own RFI bands on the system

(custom) or disable it.

Limit mask To reduce the impact of interference and attenuation on downstream and

upstream transmissions, ITU-T 993.2 specifies a limit PSD mask that limits the

VDSL2 transmitter’s PSD. VDSL CPE devices refer to the limit PSD mask to

adjust its PSD level when transmitting data.

Select a PSD mask to specify the frequency distribution. From the mask list, you

can also see the upstream and downstream bands.

For example, select vdsl2_a_nus0 to use upstream band 0 and up to its 32

sub-carrier and downstream band 1 starting from the 32

sub-carrier.

Available options are listed as follows.

vdsl2_a_nus0, vdsl2_a_eu32, vdsl2_a_eu36, vdsl2_a_eu40, vdsl2_a_eu44,

vdsl2_a_eu48, vdsl2_a_eu52, vdsl2_a_eu56, vdsl2_a_eu60, vdsl2_a_eu64,

vdsl2_a_eu128, vdsl1_fttex_ansi_m1, vdsl1_fttex_ansi_m2,

vdsl1_fttcab_ansi_m1, vdsl1_fttcab_ansi_m2, vdsl1_fttex_ansi_m1_e,

vdsl1_fttex_ansi_m2_e, vdsl1_fttcab_ansi_m1_e, vdsl1_fttcab_ansi_m2_e,

vdsl2_a_ct, vdsl2_b8_1, vdsl2_b8_2, vdsl2_b8_3, vdsl2_b8_4, vdsl2_b8_5,

vdsl2_b8_6, vdsl2_b8_7, vdsl2_b8_8, vdsl2_b8_9, vdsl2_b8_10, vdsl2_b8_11,

vdsl2_b8_12, vdsl2_b8_13, vdsl2_b8_14, vdsl2_b8_15, vdsl2_b8_16,

vdsl2_b7_1, vdsl2_b7_2, vdsl2_b7_3, vdsl2_b7_4, vdsl2_b7_5, vdsl2_b7_6,

vdsl2_b7_7, vdsl2_b7_8, vdsl2_b7_9, vdsl2_b7_10, vdsl2_bt_anfp,

vdsl2_c_138_b, vdsl2_c_276_b, vdsl2_c_138_co, vdsl2_c_276_co

Table 20 xDSL Port Setting (continued)

LABEL DESCRIPTION