Dynamix UM-A User Manual page 48

Startup Attempts: This field displays the number of ADSL connection attempts after loss of
showtime. A connection attempt is recorded only if showtime is attained.
Max TX Power: This field displays the transmit output power level of the CPE (Customer
Premise Equipment), which is the transmit output power level of the ADSL Router.
CO Vendor: This field displays the Central Office (CO) DSLAM vendor name, if available.
If the ADSL Router is not connected to an ADSL vendor, then "UNUSED_VENDOR_0"
will appear in this field.
Elapsed Time: This field displays the time of the ADSL Router has been in operation.
This is the amount of time the ADSL Router is on, not the amount of time it is connected to
the PC or in ADSL status.
SNR Margin: Signal to Noise Ratio (SNR) is the measure of signal intensity relative to the
background noise. The SNR Margin is the amount of increased noise that can be tolerated
while maintaining the designated BER (bit error rate). The SNR Margin is set by Central
Office DSLAM. If the SNR Margin is increased, bit error rate performance will improve, but
the data rate will decrease. Conversely, if the SNR Margin is decreased, bit error rate
performance will decrease, but the data rate will increase.
Line Attenuation: Attenuation is the decrease in magnitude of the ADSL line signal between
the transmitter (Central Office DSLAM) and the receiver (Client ADSL Router), measured in
dB. It is measured by calculating the difference in dB between the signal power level
received at the Client ADSL Router and the reference signal power level transmitted from the
Central Office DSLAM.
Errored Seconds: During Showtime, if any given second contains a CRC error, then that
second will be declared and recorded as an Errored Second.
Loss of Signal: Loss of signal refers to the ADSL Router losing an ADSL signal, not the
computer losing a signal with the modem. Loss of Signal event is only recorded if the signal
is lost while the ADSL Router is in showtime status. This field displays the count of ADSL
signal loss events.
Loss of Frame: A frame is a unit of data in ATM. This field displays the count of ADSL
frame loss events. A Loss of Frame event is only recorded if the signal is lost while the
ADSL Router is in showtime status.
CRC Errors: Cyclic Redundancy Check (CRC) is a method for checking errors in data
transmissions. This field displays the number of transmit data frames containing CRC errors.
Data Rate: This field displays the ADSL data rate in kbps.
Latency: Latency, synonymously delay, is the amount of time it takes for a packet of data to
get from one designated point to another. This field displays the two mapping modes for
latency (fast and interleaved).
4/1 Port ADSL Router P 47