Black Box MD1276A, User Manual

Page: 187 / 289

AT Commands
Page 187
V.8 is not supported by the remote modem.
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When V.90 is enabled the speeds listed can be used to set the maximum speed. For example:
AT+MS=12,1,300,38667
This sets the maximum V.90 speed to 38667. Only the maximum speed is applicable when
using V.90. The minimum speed cannot be set.
•
If <max_rate> is greater than the highest rate supported by the modulation specified by
<mod>, the modem automodes down from the highest rate of the selected modulation. For
example:
+MS=10,1,1200,24000 selects automoding down from V.32 bis 14400 bps.
•
To emulate issuance of the N1S37=x sequence command, specify the modulation and the rate
to start automoding down from using <mod> and <max_rate>, respectively. Set <min_rate>
to 300 to allow automoding all the way down to V.21 300 bps. For example:
+MS=11,1,300,16800 selects automode starting at V.34 16800 bps (no comparable S37
command).
+MS=9,1,300,12000 selects automode starting at V.32 12000 bps (same as S37=10).
<min_rate>
Is an optional number which specifies the lowest rate at which the modem may establish a
connection. The value is decimal is decimal coded, in units of bps, e.g., 2400 specifies the lowest
rate to be 2400 bps. The default is 300 for 300 bps.
+
When using V.90 or K56flex, the minimum rate can not be specified.
<max_rate>
Is an optional number which specifies the highest rate at which the modem may establish a
connection. The value is decimal coded, in units of bps, e.g., 14400 specifies the highest rate to
be 14400 bps. The default is 56000 for 56000 bps.
<x_law>
Is an optional number which specifies the codec type. The option are:
0 = m-Law
1 = A-Law
+
When using V.90, the appropriate law is selected automatically and the user
setting will be ignored.