Multi-Tech Systems MT5600BA-V92 manual Command %En Line Quality Monitor, Command Line Signal Level

Chapter 2 – AT Commands

Command: %En Line Quality Monitor

Values:	n = 0, 1, or 2
Default:	2
Description:	Controls whether or not the modem will automatically monitor
	a retrain (%E1) or fall back to a lower speed when line quality
	forward to a faster speed when line quality is sufficient (%E2).
	%E0	Disables line quality monitor and auto-retrain.
	%E1	Enables line quality monitor and auto-retrain.
	%E2	Enables line quality monitor and fallback/fall forward.

the line quality and request is insufficient and fall

Command:	%L Line Signal Level
Values:	None
Default:	None
Description:	% L Returns a value that indicates the received signal level in dBm. This value is a direct
	indication (DAA-dependent) of the receive level at the MDP, not at the telephone line
	connector. Examples: 009 = -9 dBm, 043 = -43 dBm, and so on.

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.

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
	Note: For use with MT5600BA and MT5600BR only.
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.

Multi-Tech Systems, Inc. AT Commands Reference Guide (S000273G) 12