Multitech MultiConnect MTS2SA-T User Manual page 107

Command: +MS Modulation Selection
Description: This extended-format compound parameter controls the manner of operation of the
modulation capabilities in the modem. It accepts six subparameters.
Table 8-1. +MS Command Supported Rates
Modulation
Bell 103
Bell 212
V.21
V.22
V.22 bis
V.23
V.32
V.32 bis
V.34
56K
V.90
V.92
downstream
V.92
upstream
Note:
example, modem models supporting V92 may not support K56.
Defined Values: <carrier>
<automode>
<min_rx_rate> and <max_rx_rate>
<min_tx_rate> and <max_tx_rate>
Result Code:
Multi-Tech Systems, Inc. MultiConnect Serial-to-Serial Adapter User Guide (S000354A)
Chapter 10 − Modem Mode AT Commands, S-Registers, and Result Codes
<carrier>
B103
B212
V21
V22
V22B
V23C
V32
V32B
V34
K56
V90
V92
V92
Some <carrier> values may not be supported by certain model models. For
A string that specifies the preferred modem carrier to use in originating or
answering a connection. <carrier> values are strings of up to eight
characters, consisting only of numeric digits and upper case letters.
<carrier> values for ITU standard modulations take the form: <letter><1-4
digits><other letters as needed>. Defined values are listed in Table 8-1.
A numeric value which enables or disables automatic modulation negotiation
(ITU-T V.3 2bis Annex A or V.8).
0 = Automode disabled.
1 = Automode enabled. (Default.)
Numeric values which specify the lowest (<min_rx_rate>) and highest
(<max_rx_rate>) rate at which the modem may establish a receive
connection. May be used to condition distinct limits for the receive direction
as distinct from the transmit direction. Values for this subparameter are
decimal encoded, in units of bit/s. The possible values for each modulation
are listed in Table 8-1. Actual values will be limited to possible values
corresponding to the entered <carrier> and fall-back <carrier> as determined
during operation. (Default = lowest (<min_rx_rate>) and highest
(<max_rx_rate>) rate supported by the selected carrier.)
Numeric values which specify the lowest (<min_tx_rate>) and highest
(<max_tx_rate>) rate at which the modem may establish a transmit
connection. Non-zero values for this subparameter are decimal encoded, in
units of bit/s. The possible values for each modulation are listed in Table 8-3.
Actual values will be limited to possible values corresponding to the entered
<carrier> and fall-back <carrier> as determined during operation. (Default =
lowest (<min_tx_rate>) and highest (<max_tx_rate>) rate supported by the
selected carrier.)
Reporting Current or Selected Values
Command: +MS?
Reporting Supported Range of Parameter Values
Command: +MS=?
OK - Valid subparameter string
Otherwise ERROR
Possible (<min_rx_rate>, <min_rx_rate>, (<min_tx_rate>),
and <max_tx_rate>) Rates (bps)
300
1200 Rx/75 Tx or 75 Rx/1200 Tx
300
1200
2400 or 1200
1200
9600 or 4800
14400, 12000, 9600, 7200, or 4800
33600, 31200, 28800, 26400, 24000, 21600, 19200, 16800,
14400, 12000, 9600, 7200, 4800, or 2400
56000, 54000, 52000, 50000, 48000, 46000, 44000, 42000,
40000, 38000, 36000, 34000, 32000
56000, 54667, 53333, 52000, 50667, 49333, 48000, 46667,
45333, 44000, 42667, 41333, 40000, 38667, 37333, 36000,
34667, 33333, 32000, 30667, 29333, 28000
56000, 54667, 53333, 52000, 50667, 49333, 48000, 46667,
45333, 44000, 42667, 41333, 40000, 38667, 37333, 36000,
34667, 33333, 32000, 30667, 29333, 28000
48000, 46667, 45333, 44000, 42667, 41333, 40000, 38667,
37333, 36000, 34667, 33333, 32000, 30667, 29333, 28000,
26667, 25333, 24000
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