Silicon Laboratories SI2493/57/34/15/04 Speaker is always off, Enable result codes See Table

AN93

	Table 39. Basic AT Command Set (Continued)
Command		Action
Ln		Speaker Volume
L1		Low
L2		Medium
L3		High
L4		Very High
Mn		Speaker operation (via AOUT).
M0		Speaker is always off.
M1		Speaker is on while dialing and handshaking; off in data mode.
M2		Speaker is always on.
M3		Speaker is off while dialing; on during handshaking and retraining.
On		Return to data mode from command mode.
O0		Return to data mode.
O1		Return to data mode and perform a full retrain (at any speed
		except 300 bps).
O2		Return to data mode and perform rate renegotiation.
Qn		Response mode.
Q0		Enable result codes (See Table 43.)
Q1		Disable result codes (enable quiet mode)
R		Initiate V.23 Reversal (U53 bit 15 must be set.)
Sn		S-register operations (see Table 45)
S$		List contents of all S registers.
Sn?		Display contents of S-register n.
Sn=x		Set S-register n to value x (n and x are decimal values).
Vn		Result code type (See Table 43)
V0		Numeric result codes.

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