Zyxel VES-1624FT-55A [110/312] Chapter 16 xdsl port setup

Zyxel VES-1624FT-55A [110/312] Chapter 16 xdsl port setup
Chapter 16 xDSL Port Setup
VES-1624FT-55A User’s Guide
110
Min INP Specify the level of impulse noise (burst) protection for a slow (or interleaved)
channel related to upstream or downstream transmissions.
This parameter is defined as the number of consecutive DMT symbols or
fractions thereof. The number of symbols decides how long in one period errors
can be completely corrected. A higher symbol value provides higher error
correction capability, but it causes overhead and higher delay which may impact
multimedia data receiving quality.
Enter 0 to disable impulse noise protection.
UPBO UPBO (Upstream Power Back-Off) mitigates far-end crosstalk (FEXT) caused
by upstream transmission on shorter loops to longer loops. See Section 13.1.7
on page 169.
Select Enable or Disable to turn it on or off.
ESEL This is Upstream Power Back-off Exchange-Side Electrical Length. This
specifies the electrical length of the cable between CPE and CO.
Set this other than 0 (1~1270, in 0.1 dB) to force CPE devices to use the
Device's electrical length value for UPBO adjustment.
Set this to 0 to use a dynamic electrical length based on the result of the
negotiation between the Device and CPE devices.
Upstream Band
1, 2, 3
Specify 4000~8095 (0.01 dBm/Hz) for parameter A which defines the original
band shape. Specify 0~4095 (0.01 dBm/Hz) for parameter B which defines the
power back-off degree. Parameter A and B are used for UPBO PSD mask
calculation.
DPBO Select Enable to avoid interference with other services (such as ISDN, ADSL or
ADSL2 provided by other devices) on the same bundle of lines. ISDN in Europe
uses a frequency range of up to 80 kHz, while ISDN in Japan uses a frequency
range of up to 640 kHz. ADSL utilizes the 1.1 MHz band. Both ADSL2 and
ADSL2+ utilize the 2.2 MHz band.
Select Disable to turn it off.
EPSD This is a pre-defined PSD mask to reduce interference with other services (for
example, ADSL) in the same copper bundle.
psd_co: Select this if the Device is deployed at the CO and you want it to use
the full ADSL band.
psd_flat: Select this to have the Device not use the ADSL band.
psd_cab_ansi: Select this if the Device is deployed in a cabinet and has to
coexist with other services in region A.
psd_cab_etsi: Select this if the Device is deployed in a cabinet and has to
coexist with other services in region B.
psd_exch_etsi: Select this if the Device is deployed in an exchange and has to
co-exist with other services in region B.
psd_exch_ansi: Select this if the Device is deployed in an exchange and has to
co-exist with other services in region A.
Please refer to G.993.2 appendix for region A and B.
Click Custom to display a screen where you can customize breakpoints and
PSD level for the PSD mask. See Section 16.9.2 on page 111.
DPBOESEL This is the electrical length of the cable between CO and Cabinet. See Section
13.1.9 on page 170.
ESCMA,
ESCMB,
ESCMC
These parameters define a cable model that is used to describe the frequency
dependent loss of exchange-side cables.
MUS This defines the assumed minimum usable received PSD mask (in dBm/Hz) for
exchange based services, used to modify parameter DPBOFMAX defined
below.
Table 20 xDSL Port Setting (continued)
LABEL DESCRIPTION

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