Running CPE Tests
Copper, VDSL2, ADSL2+, and IP Triple-Play Test Set
165
Reading Results
³
Parameter
lists the
DownStream
and
UpStream
results for the
following parameters:
³
Max BitRate
displays the maximum attainable bit rates that the
circuit can handle as determined by the remote terminal and CO
during the training phase. Values can be greater than the actual bit
rate.
³
Actual BitRate
displays the values at which the unit and CO are
connected, as negotiated during the training phase. The values
should represent what the CO was set to, unless the DSL link is
being subjected to high levels of noise/crosstalk, and are typically
what the DSLAM has been set to, whether interleaved or fast.
³
Capacity
is the capacity of the line as a ratio of achieved bit rate
over the maximum attainable bit rate (Max BitRate) presented as a
percentage (
%
). A high value could mean that the link is nearing its
maximum capabilities while a low value could mean the link is
being under utilized (sometimes intentionally – verify your local
DSLAM setup).
³
Latency
is the path type,
Fast
or
Interleave
, set by the service
provider at the CO. The use of the interleaved path means greater
delay in the delivery of data but it is less susceptible to noise or
crosstalk due to increased Reed-Solomon coding and forward
error checking (FEC). The use of the fast path means little of no
delay in the delivery of data but it is more susceptible to noise and
crosstalk.
When set up over Ethernet, the available test results are the following:
³
Line Status
displays either
Connected
or
Disconnected
for the
particular line connection under test.
³
LinkSpeed
is a choice between
AUTO
(negotiated during the link
establishment),
100
or
10 Mbps
.
³
ConnectMode
is
FULL_DUP
or
HALF_DUP
, when
Link Speed
is set to
either
100
or
10 Mbps
.
