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Appendix

AT commands

Modulation control commands

EDSMF2181IB EN 3.0

10.3.4 Modulation control commands

Command: +MS

Modulation range

This composite parameter for an extended format checks the mode of operation of the

modulation capabilities in the modem. It accepts 6 subparameters. Syntax:

+MS=[<carrier>[,<automode>[,<min_tx_rate>[,<max_tx_rate> [,<min_rx_rate>

[,<max_rx_rate>]]]]]] Where possible, the following table lists <carrier>, <min_tx_rate>,

<max_tx_rate>, <min_rx_rate> and <max_rx_rate> −values:

Modulation <carrier> Possible (<min_rx_rate>, <min_rx_rate>, (<min_tx_rate>), and

<max_tx_rate>) rates (bps)

Bell 103 B103 300

Bell 212 B212 1200 Rx/75 Tx or 75 Rx/1200 Tx

V.21 V21 300

V.22 V22 1200

V.22bis V22B 2400 or 1200

V.23 V23C 1200

V.32 V32 9600 or 4800

V.32bis V32B 14400, 12000, 9600, 7200, or 4800

V.34 V34 33600, 31200, 28800, 26400, 24000, 21600, 19200, 16800, 14400, 12000,

9600, 7200, 4800, or 2400

56K K56 56000, 54000, 52000, 50000, 48000, 46000, 44000, 42000, 40000, 38000,

36000, 34000, 32000

V.90 V90 56000, 54667, 53333, 52000, 50667, 49333, 48000, 46667, 45333, 44000,

42667, 41333, 40000, 38667, 37333, 36000, 34667, 33333, 32000, 30667,

29333, 28000

V.92

downstream

V92 56000, 54667, 53333, 52000, 50667, 49333, 48000, 46667, 45333, 44000,

42667, 41333, 40000, 38667, 37333, 36000, 34667, 33333, 32000, 30667,

29333, 28000

V.92 upstream V92 48000, 46667, 45333, 44000, 42667, 41333, 40000, 38667, 37333, 36000,

34667, 33333, 32000, 30667, 29333, 28000, 26667, 25333, 24000

Note: It may be the case that some <carrier> values of certain modem models are not supported. It may for

instance happen that V92 modem models do not support K56 modem models.

Tab. 10−1 +MS command supports rates

Lenze EMF2181IB User Manual

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