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

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

Command: %Q Line Signal Quality

Values: None

Default: None

Description: %Q Reports line signal quality (DAA-dependent) as a three-digit number. Returns the

higher order byte of the EQM value. Based on the EQM value, retrain or fallback/fall

forward may be initiated if enabled by %E1 or %E2.

MT5600BA LCD:

Command: %U PCM Code Selection

Values: n = 0 or 1

Default: 0

Description: Specifies the PCM code type for 56K modulation. Note, however, that the modem

automatically selects the code type if the server sends the proper ID.

%U0 Selects µ-Law coding—used in North America and Japan.

%U1 Selects A-Law coding—used outside North America and Japan.

Note: See also the +MS= command.

Command: \An Maximum MNP Block Size

Values: n = 0, 1, 2, or 3

Default: 1

Description: \A0 64-character maximum block size.

\A1 128-character maximum block size.

\A2 192-character maximum block size.

\A3 256-character maximum block size.

Command: \Bn Transmit Break

Values: n = 0–9 in 100 ms units

Default: 3

Description: In non-error-correction mode only, sends a break signal of the specified length to a remote

modem. Works in conjunction with the \K command.

Command: \Kn Break Control

Values: n = 0–5

Default: 5

Description: Controls the response of the modem to a break received from the computer, the remote

modem, or the \B command. The response is different for each of three different states.

Data mode. The modem receives the break from the computer:

\K0 Enter online command mode; no break sent to the remote modem.

\K1 Clear data buffers and send break to the remote modem.

\K2 Same as \K0.

\K3 Send break immediately to the remote modem .

\K4 Same as \K0.

\K5 Send break to the remote modem in sequence with the transmitted data.

Data mode. The modem receives the break from the remote modem during a non-error-

corrected connection:

\K0 Clear data buffers and send break to the computer.

\K1 Same as \K0.

\K2 Send break immediately to the computer.

\K3 Same as \K2.

\K4 Send break to the computer in sequence with the received data.

\K5 Same as \K4.

Online command mode. The modem receives a \Bn command from the computer:

\K0 Clear data buffers and send break to the remote modem.

\K1 Same as \K0.

\K2 Send break immediately to the remote modem.

\K3 Same as \K2.

\K4 Send break to the remote modem in sequence with the transmitted data.

K5 Same as \K4.

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Multitech BL-Series Manuale Utente Pagina 14

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