SETUP
DOC_DEV_XS_Setup guide_C
page 23
Minimum bit rate
Minimum rate value for this connection
Possible values :
192 to 5696 kb/s step 64 Kb/s
Maximum bit rate
Maximum rate value for this connection
Possible values :
192 to 5696 kb/s step 64 Kb/s
Used margins
The SNR ratio margin may be determined either according to current conditions (CC) or according to
predefined conditions considered the worst (WC)
Possible values :
CC margins, WC margins, CC and WC margins, No margin
Default value :
CC margins
CC SNR margin
This is the desired margin above the minimum operating threshold.
When the switch establishes the connection, it measures the signal to noise ratio and subtracts the SNR ratio
margin.
If the result is greater than the minimum required, the connection is established
Possible values :
-10 to 21dB
Alternate CC SNR margin
Visible when the "rate adaptation System" is set to "
Line probing”.
If the connection cannot be established with the specified SNR ratio margin, then the switch attempts to
connect with this alternative margin. The value must be higher than the previous, which will result in a
connection at a lower data rate.
Possible values :
-10 to 21dB
« Dichotomic search » :
The XS successively performs several connections at different rates until the connection satisfies the
requested criteria of bit rate and signal-to-noise ratio margin.
Bisect steps
The higher the number, the more accurate the result, but the connection setup time will be longer.
Possible values :
3 to 6
Minimum required margin
This is the minimum signal-to-noise ratio acceptable for this connection.
Possible values :
-10 to 21 dB
Maximum margin
This is the maximum signal-to-noise ratio acceptable for this connection. The larger the margin range between
minimum and maximum, the faster the connection setup time, but with a less accurate result.
Possible values :
-10 to 21 dB
Minimum required bitrate
By defining a minimum bit rate, the connection is forbidden at a rate that is too low. This is useful in a
redundant link topology where it is better to use the backup link rather than the master link when the line
conditions have become bad.
Possible values :
0 to 15232 kb/s step 64 kb/s (0 means unused)
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