ZyXEL Communications Comet 3356, User Manual

Page: 44 / 76

+MS Modulation Commands 37
The modem connects at the highest possible rate in accordance with V.8 bis/V.8,
or V.32 bis Annex A if V.8 bis/V.8 is not supported by the remote modem.
a. 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.
b. 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 to V.21 300 bps. For example:
+MS=11, 1, 300, 16800 selects automodestarting at V.34 16800 bps (no comparable
S37 command).
+MS=9, 1, 300, 12000 selects automode starting at V.32 bis 12000 bps same as
N1S37=10).
3. <min_rate> is an optional number specifies the lowest rate at which the
modem may establish a connection. The value 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.
4. <max_rate> is an optional number 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
28800 for 28800 bps.
5. <x_law> is an optional number which specifies the codec type. The options
are:
0=
µ
-Law
1=A-Law
Note that ATZ will reset the <x_law> selection to 0 (
µ
-Law).
6. <rb_signaling> is an optional number which enables or disables robbed bit
signaling generation in a server modem or enables or disables robbed bit
signaling detection in a client modem. The options are:
0=Robbed bit signaling generation (server modem) or detection (client modem)
disabled. (default)