User's Manual

Reports the line signal quality (DAA dependent). Returns the higher order byte of the EQM value. Based on
the EQM value, retain or fallback/fall forward may be initiated if enabled by %E1 or %E2.
%Un Select  Law or A_Law Codec Type
This command selects  Law or A_Law codec type for V.90 and K56 flex modulation similar to the
<x_law> parameter in the +MS command (see +MS command). This command overrides the <x_law>
setting specified in a previous +MS command and the <x_law> parameter in a +MS command overrides a
previous %Un command. This command also stores the selected setting directly to NVRAM.
%U0 Selects  Law.
%U1 Selects A_Law.
Result codes:
OK n = 0 or 1.
ERROR Otherwise.
2.2.d Commands Preceded by +
+MS Select Modulation
This extended-format command selects the modulation and, optionally, enables or disables automode,
specifies the lowest and highest connection rates, selects u-Low or A-Low codec type, and enables or
disables robbed bit signaling generation (server modem) or detection (client modem) using one to five
subparameters. The command format is:
+MS=<mod> [,[<automode>][,[<min_rate>][,[<max_rate>][,[<x_law>][,[<rb_signaling>]]]]]]<CR>
Notes:
1. For 14400 bps and lower speeds, the Nn command and S37 register can alternatively be used, in
which case the +MS subparameters will modified to reflect the Nn and S37=x settings. Use of the Nn
and S37=x commands is not recommended but is provided for compatibility with existing
communication software. (S37 is not updated by the +MS command.)
2. Subparameters not entered (enter a comma only or <CR> to skip the last subparameter) remain at
their current values.
Reporting Selected Options
The modem can send a string of onformation to the DTE consisting of selected options using the following
command:
+MS?
The response is:
+MS: <mod>,<automode>,<min_rate>,<max_rate>,<x_law>,<rb_signaling>
For example,
K56flex: +MS: 56,1,300,56000,0,0
V.90: +MS: 12,1,300,56000,0,0,33600 (RC56 default values)
Reporting Supported Options