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#VTR=n Loop current interrupt qualifier
#VZ=n Set audio mode
: Pager dial modifier
3.8 Speakerphone Commands
#SPC=n Select AEC/EEC echo cancellation
#SPD=n Download speakerphone parameters
#SPF=n Select auto/fixed echo cancellation
#SPG=n Set microphone gain
#SPL=n Set DSP microphone gain
#SPM=n Enable speakerphone
#SPT=n Speakerphone forced train
#SPU=n Upload speakerphone parameters
#SPV=n Set speakerphone volume
#SPZ=n Set microphone AGC
#VM=n Set microphone status
Section Four - S Registers
Your modem has 39 registers, designated S0 through
S27, S36-S38, S46, S48-S50, S63, S82, S86, and S98. Table
4-1 shows the registers, their functions, and their default
values. Some registers can have their values changed by
commands. If you use a command to change a register value,
the command remains in effect until you turn off or reset your
modem. Your modem then reverts to the operating character-
istics specified in its non-volatile memory. Refer to Section
3 for information on how to use the AT commands to
manipulate the S registers.
Table 4-1 S - Registers
Register Function Range/units Default
S0 Auto-answer Ring 0-255/rings 0
S1 Ring counter 0-255/rings 0
S2 Escape code character 0-127/ASCII 43
S3 Carriage return character 0-127/ASCII 13
S4 Line feed character 0-127/ASCII 10
S5 Backspace character 0-32, 127/ASCII 8
S6 Dial tone wait time 0-255/seconds 2
S7 Remote carrier wait time 1-255/seconds 40
S8 Comma pause time 0-255/seconds 2
S9 Carrier detect time 0-255/0.1 second 6
S10 Carrier loss time 0-255/0.1 second 14
S11 Touch-tone dialing speed 50-255/0.001 second 75
S12 Esc. character detect time 0-255/0.02 second 40