
90 AT Command Set Summaries
Command Options
Function & Description Ref.
I1 Display product information and
ROM checksum
I2 Display modem link status report
I12 Display physical layer status
Ln n=0-7
4 *
Speaker volume control. The higher
the value, the higher the volume
S24.5-7
Mn Speaker control S21.1-2
M0 Speaker always OFF
M1 * Speaker ON until call is answered
M2 Speaker always ON
M3 Speaker ON after the last digit is
dialed out and OFF when carrier is
detected
Nn n=0-7
5 *
Ring volume control.'N0' will disable
the audio ring function
S24.1-3
O Return to on-line state
O1 Force modem to request a retrain
Qn Result code displayed S23.7
Q0 * Modem returns result code
Q1 Modem does not return result code
Q2 Modem returns result code but quiet
after answering on a RING (see also
S42.2)
S40.1
Sr.b=n Set bit 'b' of S-register 'r' to value 'n'.
'n' is a binary digit '0' or '1'
Sr.b? Display value of bit 'b' of S-register 'r'
Sr=n Set S-register 'r' to value 'n'. 'n' must
be a decimal number between 0 and
255
Sr? Display value stored in S-register 'r'
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