Windows Marketplace V.90 - Manual (Page 59)

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S89 Timer to Control Sleep Mode
This command displays the number of seconds of inactivity (no characters sent
from the DTE, no RING) in the off-line command state before the modem places
itself into standby mode. A value of zero prevents standby mode.
Note: If a number between 1 and 4 is entered for this register, it will set the value
to 5, and the inactivity before standby will be 5 seconds. This is done for compat-
ibility with previous products which allowed time-outs down to 1 s.
Range: 0, 5-255
Default: 10
S90 Local Phone Status
This register tells the status of the local phone. It is read only.
0 = local phone on-hook
1 = local phone off-hook
S91 Line Transmit Level
This register is effective only for Japan. It specifies the line transmit level in dB
with an implied minus sign.
Range: 6-15
Default: 15
Units: 1 dB
S92 Direct Connect Transmit Level (default 20)
Sets the transmit level, in dBm for direct connect. This value may have different
settings for different phones.