Operation Manual

Issue 7 - 10/08 EN-29
Displaying Detailed Results
English
Trained Modulation
This displays the mode that the DSLAM is operating in.
Upstream and Downstream Status
 Note
The Upstream Attainable Bit Rate (and hence the
Upstream Percentage Capacity Used), is based on results
reported to the MC2+ by the remote DSLAM. Because
there is no universal standard for the communication of
this result, the MC2+ can not be compatible with all
DSLAMs and the results may, in some cases, be Not
Available or incorrect. This is not a fault of the MC2+.
The Upstream Status is for the signals sent from the
Modem to the DSLAM.
The Downstream Status is for the signals sent from the
DSLAM to the Modem.
• Rate (Kbps): This is the speed of data transfer
between the Modem and the DSLAM.
• Max Attainable Bit Rate (Kbps): This the maximum
bit rate that the DSL link can achieve. The actual bit
rate is normally lower than the Attainable bit rate
because the actual bit rate can be limited by the
subscribed service.
• Percentage Bit Rate Used: This is the ratio of the
actual bit rate to the Attainable bit rate.
• Margin (dBm): The noise margin measured.
• Transmit Power (dBm): The power transmitted from
the DSLAM (downstream) and the Modem
(upstream).
Peak Cell Rate
The peak value of the ATM cell rate.
Path Mode
This can be fast or interleaved.
Errors
• LOS Errors: A condition at the receiver indicating
that the receiving equipment has lost the received
signal. The Number of Loss of Signal errors.
• CRC Fast Errors: Displays the Cyclic Redundancy
Check errors, received and transmitted, detected
during the session.
The number of Background BERT errors detected on
the DSL Fast Channel.
121800-7.book Page 29 Monday, October 20, 2008 4:11 PM