S Registers
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ATS122 AutoRateChangeThe maximum average EQM level reached before the modem will downshift a speed. The default
is 55 which means that if the average EQM ever goes higher than 55, then a downshift in speed
will occur.
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EQM stands for Eye Quality Monitor, and is a reading of the current line quality.
To view the current EQM, after connecting enter local mode by typing +++ and then type:
AT\V7<cr>.
You will be presented with a realtime reading from the modem similar to the following:
Speed EQM: max min av hex limit Rx-Dbm S10 S09 C=cts loss S=rlsd
loss 19200 075A 008 007 007 (07) 016 029 018 000
Speed: the line speed currently connected at.
EQM: the Eye Quality Monitor (a numeric reading of the line
condition).
max: maximum EQM reached for this connection.
min: minimum EQM reached for this connection.
av: average EQM (this is the value that the above S registers
refer to).
hex: hexidecimal reading of the EQM value.
Rx-Dbm: the receive level that the modem is operating at.
Default
55
Range
30-100