As follows from Chart 1, many data rates allows to use multiple
line coding modes. Rule: apply a coding mode with less positions
(ТСРАМ8, ТСРАМ4) on a line exposed to high level of noise;
apply a coding mode with more positions (ТСРАМ32, ТСРАМ16)
if bandwidth is limited.
In the local configuration mode (CFG=LOCAL) all four variations of the line
coding are applicable. In the Preactivation mode (CFG=PREACT), only two
codings can be used: TCPAM16 in the 192 to 3840 kbps range and TCPAM32
in the 768 to 5696 kbps range.
If the data rate is not within the permitted range for an entered line coding
mode, the following message appears:
invalid line code for this
rate
.
3.3.4 Link statistics
Use the
dsl
command with the
stat
option to view link statistics:
: dsl stat
DSL: CFG=LOCAL Rate=512 Code=TCPAM8 SLAVE Annex=A - ONLINE
TX=1341 RX=1231 ERR=1 LOSW=12 CRC6=11 RETRAIN=2 of 5
Loop Loss: 0.0 dB Noise Margin: +22.0 dB
Total online time: 0 days 00:42:19
Total offline time: 0 days 00:18:02
Connect duration: 0 days 00:15:53
:
Legend:
ONLINE
– the DSL link is activated;
OFFLINE
– the DSL link is not activated;
TX
– the number of transmitted packets;
RX
– the number of received packets;
ERR
– the number of received packets with errors;
LOSW
– the number of frame synchronization loss events;
CRC6
– the number of CRC6 checksum errors;
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