Multitech MultiModem DSVD MT5600DSVD, User Manual

Page: 41 / 82

MultiModemDSVD User Guide 4 AT Commands, S-Registers, and Result Codes
36
Command: +MS= Modulation Selection
Values: See description.
Default: See description.
Description: This extended-format command selects modulation and, op-
tionally, enables or disables automode, specifies the lowest and
highest connection rates, selects µ-Law or A-Law codec type,
and specifies the highest transmit rate using one to five
subparameters.
The command format is
+MS= [ mod ][,[ automode ][,[ min_RX_rate ][,[ max_RX_rate ][,[ x_law ]
[,[ reserved ][,[ max_TX_rate ]]]]]]]<CR>
Subparameters that are not entered retain their current value.
Commas separate optional subparameters, and should be in-
serted to skip a subparameter. Example:
+MS=,0,<CR> disables
automode and keeps all other settings at their current values.
+MS? Reports current options in the format
mod , automode , min_RX_rate , max_RX_rate , x_law , reserved,max_TX_rate.
Example: 56,1,300,56000,0,0,33600.
+MS=? Reports supported options in the format (list of supported mod
values),(list of supported automode values),(list of supported
min_RX_rate values),(list of supported max_RX_rate values),
(list of supported x_law values), (list of supported reserved
values),(list of supported max_TX_rate values).
Example: (0,1,2,3,9,10,11,56,64,69),(0,1),(300-33600),(300-
56000),(0,1),(0,1),(300-33600).
Subparameters
mod A decimal number that specifies the preferred modula-
tion (automode enabled) or the modulation to use in originat-
ing or answering a connection (automode disabled).
See the
table on the next page.
automode An optional numeric value that enables or disables
automatic modulation negotiation using V.8 bis/V.8 or V.32
bis Annex A. The options are:
0 = Disable automode
1 = Enable automode (default)
min_RX_rate An optional number that specifies the lowest
rate at which the modem may establish a receive connection.
The value is decimal coded in units of bps, e.g., 2400 specifies
the lowest rate to be 2400 bps. See “Possible rates” in the
mod
table. The default is 300 for 300 bps.
max_RX_rate An optional number that specifies the highest
rate at which the modem may establish a receive connection.
The value is decimal coded in units of bps, e.g., 28800 specifies
the highest rate to be 28800 bps. See “Possible rates” in the
mod
table. The default is 56000, for 56000 bps.