MultiModemDSVD User Guide

4

AT Commands, S-Registers, and Result Codes

 

 

 

 

 

 

<mod>

Modulation

Possible rates (bps)1

 

 

 

0

V.21

300

 

 

 

 

1

V.22

1200

 

 

 

 

 

 

 

 

 

 

 

2

V.22bis

2400

or 1200

 

 

 

3

V.23

1200

 

 

 

 

 

 

 

 

 

 

 

9

V.32

9600

or 4800

 

 

 

10

V.32bis

14400, 12000, 9600, 7200, or 4800

 

 

 

 

 

 

 

 

 

11

V.34

33600, 31200, 28800, 26400, 24000, 21600,19200, 16800,

 

 

 

 

 

14400, 12000, 9600, 7200, 4800, or 2400

 

 

 

122

V.90

56000, 54667, 53333, 52000, 50667, 49333, 48000, 46667,

 

 

 

 

 

45333, 44000, 42667, 41333. 40000, 38667, 37333, 36000,

 

 

 

 

 

34667, 33333, 32000, 30667, 29333, or 28000

 

 

 

 

 

 

 

 

 

563

K56flex

56000, 54000, 52000, 50000, 48000, 46000, 44000, 42000,

 

 

 

 

 

40000, 38000, 36000, 34000, or 32000

 

 

 

64

Bell 103

300

 

 

 

 

 

 

 

 

 

 

 

69

Bell212

1200

 

 

 

Notes:

 

 

 

 

 

1.

See optional <automode>, <min_RX_rate>, <max_RX_rate>, and <max_TX_rate>

 

 

 

subparameters.

 

 

 

 

2. Selects V.90 modulation as first priority. If a V.90 connection cannot be established,

 

 

 

the modem attempts K56flex, V.34, V.32bis, etc. (Default.)

 

 

3. Selects K56flex modulation as first priority. If a K56flex connection cannot be

 

 

 

established, the modem attempts V.90, V.34, V.32bis, etc.

 

 

 

 

 

 

 

 

x_law An optional number that specifies the PCM code type for 56K modulation. The options are:

0= µ-Law—used in North America and Japan (default)

1= A-Law—used outside North America and Japan

The modem automatically selects A-Law or µ-Law if the server sends the Conexant ID. Note that the ATZ command restores the x_law value from NVRAM. You can also manually select A-Law or µ-Law using the %U command.

 

reserved Must not be changed from the default value of 0.

 

max_TX_rate An optional number that specifies the highest

 

rate at which the modem may establish a transmit connection.

 

The value is decimal coded in units of bps, e.g., 33600 specifies

 

the highest rate to be 33600 bps. See “Possible rates” in the mod

 

table. The default is 33600, for 33600 bps.

Command: -Kn

MNP Extended Services

Values:

n = 0, 1, or 2

Default:

0

Description:

Enables or disables conversion of a V.42 LAPM connection to

 

an MNP 10 connection.

-K0

Disables V.42 LAPM to MNP 10 conversion.

-K1

Enables V.42 LAPM to MNP 10 conversion.

-K2

Enables V.42 LAPM to MNP 10 conversion; inhibits MNP

 

Extended Services initiation during V.42 LAPM answer mode

 

detection phase.

Multi-Tech Systems, Inc.

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