ZyXEL Communications Comet 3356 User Manual page 43

b. The DTE may disable automode operation (see <automode> below).
c. The DTE may constrain the range of modulations available by specifying the
lowest and highest rates (see <min_rate> and <max_rate> below).
2. <automode> is an optional numeric value which enables or disable automatic
modulation negotiation using V.8 bis/V.8 or V.32 bis Annex A. The options are:
<automode>
0
1
The default value is 1, which enablesautomode. Note, however, there are
modulations for which there is no automode negotiation, e.g., Bell 212
(<mod>=69).
For <automode> = 0 (automode disabled,i.e., fixed modulation):
a. If <max_rate> is within the rates supported by the selected modulation, the
selected rated is that specified by <max_rate>. For example,
+MS=10, 0, 1200, 4800 selects V.32 bis 4800 bps fixed rate.
b. If <max_rate> is greater than the highest speed supported by the modulation
specified by <mod>, the starting rate is the highest rate supported by the
selected modulation. For example,
+MS=10, 0, 2400, 14400 selects V.32 bis 14400, 12000, 9600, 7200, or 4800 bps.
c. To emulate issuance of the N0S37=x command sequence to select fixed mode
operation, specify the <max_rate>and<min_rate> both to be the (same)
requested speed, and <mod> to be the modulation for that speed. For
example,
+MS=11, 0, 16800, 16800 selects V.34 16800 bps fixed mode (no comparable S37
command).
+MS=10, 0, 12000, 12000 selects V.32 bis 12000 bps fixed mode (same as
N0S37=10).
For <automode> = 1 (automode enabled, i.e., automatically selected speed and
modulation) :
36 +MS Modulation Commands
Option Selected
Automode disabled
Automode enabled using V.8 bis/V.8 or V.32
Annex A
Notes
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