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Page 66 / 240 Scroll up to view Page 61 - 65
Chapter 3 Device Info Screens
Basic Home Station VDSL2 P8701T User’s Guide
66
Figure 8
WAN Statistics Screen
Each field is described in the following table.
3.7
The xTM Statistics Screen
Log into the VDSL Router’s web configurator and click
Wireless network > Classic configuration
> Device Info > Statistics > xTM
to display ATM or PTM connection information.
Table 6
WAN Statistics Screen
LABEL
DESCRIPTION
Interface
This shows the name of the WAN interface used by this connection.
The default name
ipoa*
,
pppoa*, atm*
or
ptm*
indicates the DSL port.
ppp*
indicates a
PPP connection via any one of the WAN interfaces.
ppp3G0
indicates a PPP connection
through the 3G interface.
The number after the dot (
.
) represents the VLAN ID number assigned to traffic sent
through this connection. The number after the underscore (
_
) represents the index number
of connections through the same interface.
(null)
means the entry is not valid.
Description
This shows the descriptive name of this connection.
ATM interfaces include the VPI and VCI.
0
and
35
or
0
and
1
are the default VPI and VCI
numbers. The last number represents the index number of connections over the same PVC
or the VLAN ID number assigned to traffic sent through this connection.
(null)
means the entry is not valid.
Received
Bytes
This indicates the number of bytes received on this interface.
Pkts
This indicates the number of packets received on this interface.
Errs
This indicates the number of frames with errors received on this interface.
Drops
This indicates the number of received packets dropped on this interface.
Transmitted
Bytes
This indicates the number of bytes transmitted on this interface.
Pkts
This indicates the number of transmitted packets on this interface.
Errs
This indicates the number of frames with errors transmitted on this interface.
Drops
This indicates the number of outgoing packets dropped on this interface.
Reset Statistics
Click this to clear the screen’s statistics counters.
Page 67 / 240
Chapter 3 Device Info Screens
Basic Home Station VDSL2 P8701T User’s Guide
67
Figure 9
xTM Statistics Screen
Each field is described in the following table.
3.8
The xDSL Statistics Screen
Log into the VDSL Router’s web configurator and click
Wireless network > Classic configuration
> Device Info > Statistics > xDSL
to display information about the VDSL Router’s VDSL or ADSL
connections.
Table 7
xTM Statistics Screen
LABEL
DESCRIPTION
Port Number
This identifies the ATM or PTM port.
In Octets
This displays the number of 8-bit binary digits (bytes) received through the port.
Out Octets
This displays the number of 8-bit binary digits (bytes) sent through the port.
In Packets
This displays the number of packets received through the port.
Out Packets
This displays the number of packets sent through the port.
In OAM Cells
This displays the number of OAM (Operational, Administration and Maintenance) cells
received through the port.
Out OAM Cells
This displays the number of OAM cells sent through the port.
In ASM Cells
This displays the number of ASM (Autonomous Status Message) cells received through the
port.
Out ASM Cells
This displays the number of ASM cells sent through the port.
In Packet Errors
This displays the number of errored packets received on the port.
In Cell Errors
This displays the number of errored cells received on the port.
Reset
Click this to clear the screen’s statistics counters.
Page 68 / 240
Chapter 3 Device Info Screens
Basic Home Station VDSL2 P8701T User’s Guide
68
Figure 10
xDSL Statistics Screen
Each field is described in the following table.
Table 8
xDSL Statistics Screen
LABEL
DESCRIPTION
Mode
This field identifies the DSL mode of the DSL connection.
Traffic Type
This displays the type of traffic the DSL port is sending and receiving.
Status
This displays the current state of setting up the DSL connection.
Link Power
State
This displays the DSL connection’s current power usage or power saving mode.
null
displays
when there is no DSL connection.
Downstream
These are the statistics for the traffic direction coming into the port from the service
provider.
Page 69 / 240
Chapter 3 Device Info Screens
Basic Home Station VDSL2 P8701T User’s Guide
69
Upstream
These are the statistics for the traffic direction going out from the port to the service
provider.
Line Coding
(Trellis)
This displays whether or not the port is using Trellis coding for traffic. Trellis coding helps to
reduce the noise in ADSL transmissions. Trellis may reduce throughput but it makes the
connection more stable.
SNR Margin
(0.1 dB)
This displays the Signal-to-Noise Ratio margin (in 0.1 dB). A DMT sub-carrier’s SNR is the
ratio between the received signal power and the received noise power. The signal-to-noise
ratio margin is the maximum that the received noise power could increase with the system
still being able to meet its transmission targets.
Attenuation
(0.1 dB)
This displays the line attenuation, measured in tenths of a decibel (0.1 dB). This attenuation
is the difference between the power transmitted at the near-end and the power received at
the far-end. Attenuation is affected by the channel characteristics (wire gauge, quality,
condition and length of the physical line).
Output Power
(0.1 dBm)
This displays the far end actual aggregate transmit power (in dBm). Downstream is how
much port the service provider is using to transmit to the port. Upstream is how much
power the port is using to transmit to the service provider.
Attainable Rate
(Kbps):
These are the highest theoretically possible transfer rates at which the port could send and
receive data.
Rate (Kbps)
This displays the data transfer rates at which the port is receiving and sending.
Super Frames
This displays the number of ADSL superframes the DSL connection received and
transmitted. Each superframe contains 68 ADSL data frames and a one-frame synch symbol
for a total number of 69 frames.
Super Frame
Errors
This displays the number of errored ADSL superframes the DSL connection received and
transmitted.
RS Words
This displays the number of Reed Solomon error correction words for received and
transmitted traffic.
RS Correctable
Errors
This displays the number of errored packets corrected by Reed Solomon error correction for
received and transmitted traffic.
RS
Uncorrectable
Errors
This displays the number of errored packets that Reed Solomon error correction could not
correct for received and transmitted traffic.
HEC Errors
Header Error Control (HEC) checks for errors in packet headers.
OCD Errors
The number of Out of Cell Delineation errors for received and transmitted traffic. An OCD
error means seven consecutive ATM cells had Header Error Control (HEC) violations.
LCD Errors
The number of Loss of Cell Delineation errors for received and transmitted traffic. An LCD
state means an OCD condition persisted for 4 milliseconds.
Total Cells
This displays the total number of DSL cells including headers.
Data Cells
This displays the number of data payload DSL cells, excluding headers.
Bit Errors
This displays the number of errored bits.
Total ES
This displays the number of Errored Seconds meaning the number of seconds containing at
least one errored block or at least one defect.
Total SES
This displays the number of Severely Errored Seconds meaning the number of seconds
containing 30% or more errored blocks or at least one defect. This is a subset of ES.
Total UAS
This displays the number of UnAvailable Seconds.
xDSL BER Test
Click this to open a screen where you can perform a ADSL Bit Error Rate (BER) test to
determine the quality of the ADSL connection.
Reset Statistics
Click this to clear the screen’s statistics counters.
Table 8
xDSL Statistics Screen (continued)
LABEL
DESCRIPTION
Page 70 / 240
Chapter 3 Device Info Screens
Basic Home Station VDSL2 P8701T User’s Guide
70
3.8.1
The ADSL BER Test Screen
Do the following while the VDSL Router has an ADSL connection to perform a ADSL Bit Error Rate
(BER) test to determine the quality of the ADSL connection.
1
Log into the VDSL Router’s web configurator and click
Wireless network > Classic configuration
> Device Info > Statistics > xDSL > xDSL BER Test
to display this screen. Select a test
duration and click
Start
.
2
Click
Stop
to finish the test.
3
The test results display including the test’s duration, the number of bits transferred, the number of
errored bits, and the ratio of errored bits to transmitted bits.
3.9
The Route Info Screen
Log into the VDSL Router’s web configurator and click
Wireless network > Classic configuration
> Device Info > Route
to display the VDSL Router’s routing table.

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