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YML856 Rev3 NCT480 IP DSLAM User GuideNCT480 IP DSLAM User Guide
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ADSL2 DELT Test
DELT is primarily used for reactive tests on a loop after a CPE has been deployed, either to help troubleshoot a
line or to capture a baseline of loop characteristics at the time of installation. DELT can determine the ADSL2+
data rate (up/down), loop attenuation (up/down), SNR (up/down), and noise (up/down).
Figure 7-3 ADSL2 DELT Run & Report Dialog
Item Description
Port selection menu
Please select a port to perform DELT.
Operation State
This object identifies the high level operational state for the ATU.
Here is the state flow:
data (Click START) > handshake > discovery > delt Training > delt (Diagram is
displayed) ->handshake -> discovery > Training > data
ATUC Attainable net data rate
Indicates the maximum currently attainable data rate by the ATU. This value will be
equal to, or greater than the current line rate. (Downstream)
ATUR Attainable net data rate
Indicates the maximum currently attainable data rate by the ATU. This value will be
equal to, or greater than the current line rate. (upstream)
Upstream HLIN
The DELT-related parameter that provides an array of complex downstream Hlin (f)
values in linear scale. (Not available for ADSL and ADSL2plus)
Upstream HLOG
The DELT-related parameter that provides an array of real downstream Hlog (f) values
in dB. (Not available for ADSL and ADSL2plus)
Upstream QLN
The DELT-related parameter that provides an array of real downstream QLN (f) values
in dB. (Not available for ADSL and ADSL2plus)
Downstream HLIN
The DELT-related parameter that provides an array of complex upstream Hlin (f) values
in linear scale. (Not available for ADSL and ADSL2plus)
Downstream HLOG
The DELT-related parameter that provides an array of real upstream Hlog (f) values in
dB. (Not available for ADSL and ADSL2plus)
Downstream QLN
The DELT-related parameter that provides an array of real upstream QLN (f) values in
dB. (Not available for ADSL and ADSL2plus)
Table 7-3 Monitoring DELT Run & Report