ATM AAL5 layer statistics for each VCC over the ADSL interface
ADSL statistics
This page shows the signal attributes of the gateway's ADSL connection.
At the bottom of this page, there is a button for running a bit error rate (BER) test. This test
determines the quality of the ADSL connection. There is information on this test below the
table describing the fields.
Field Description
In Octets
This is the number of received AAL5/AAL0 CPCS
PDU octets.
Out Octets
The number of transmitted AAL5/AAL0 CPCS PDU
octets.
In Ucast Pkts
The number of received AAL5/AAL0 CPCS PDUs
passed to higher layers.
Out Ucast Pkts
The number of AAL5/AAL0 CPCS PDUs received for
transmission from higher layers.
In Errors
This is the number of AAL5/AAL0 CPCS PDUs
received that contain errors. The errors include
CRC-32 errors, SAR timeouts, and oversized SDUs.
Out Errors
The number of AAL5/AAL0 CPCS PDUs that could
not be transmitted due to errors.
In Discards
The number of AAL5/AAL0 CPCS PDUs discarded
due to input buffer overflow.
Out Discards This field is not currently used.
Field Description
VPI/VCI
Each row in the third table represents a different
VPI/VCI combination. This item is the VPI/VCI for
each row. A VPI/VCI combination is sometimes
called a VCC (virtual circuit channel).
CRC Errors
This is the number of PDUs received with CRC-32
errors.
SAR Timeouts
The number of partially-reassembled PDUs
discarded because they were not fully reassembled
within the required time period. If the re-assembly
timer is not supported, this value is zero.
Oversized SDUs
The number of PDUs discarded because the
corresponding SDUs were too large.
Short Packet Errors
his is the number of PDUs discarded because their
length was less than the size of the AAL5 trailer.
Length Errors
The number of PDUs discarded because the PDU
length did not match the length in the AAL5 trailer.
Reset button Click this button to set the totals back to zero.
第 7 頁,共 10 頁U.S. Robotics Wireless MAXg ADSL Gateway User Guide
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