Multitech BL-Series Instrukcja Użytkownika Pobierz pdf (Strona 34)

AT Commands for the MT5656ZDX, MT5600ZDX, MT5600BA/BL-Series Modems

Multi-Tech Systems, Inc. Commands Reference Guide (PN S000273D)

+MS= Modulation Selection Continued

<mod> Modulation Possible rates (bps)

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

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

K56flex 56000, 54000, 52000, 50000, 48000, 46000, 44000,

42000, 40000, 38000, 36000, 34000, 32000

64 Bell 103 300

69 Bell 212 1200

Table 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.

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 deci-

mal 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.

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.

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