User Manual

Trilogy 3 MPCI
M3AWEB/56GA
Product Specification
System Audio Support
LTSMMSG.exe also serves as a Windows user mode ring-3 application which
samples audio data stream generated by the driver and transfers the data onto
the system audio device. This will allow the system to support call progress tone
monitor function without using PWM (Pulse Width Modulation) speaker function
that is previously supported. This new feature eliminates the external
components (circuit) required for PWM speaker support and will help reducing
the BOM (Bill of Material) and the size of the modem hardware.
To enable this feature the following line is needed in the INF file(s) for each
operating system. (Example of system audio support in Intel Solano2 system)
[Lucent_Modems]
%INTEL_AMR.Modem% = INTEL_AMR_SA.Modem,
PCI\VEN_8086&DEV_2446&SUBSYS_12345678
(INTEL_AMR_SA.Modem entry enables system audio support in Intel system.)
[ControlFlags]
ExcludeFromSelect = PCI\VEN_8086&DEV_2446&SUBSYS_12345678
(Match the ID string with above [Lucent_Modems] ID entry.)
[PortMod.AddReg]
HKLM,SOFTWARE\Microsoft\Windows\CurrentVersion\Run,LTSMMSG,,LTSMMSG.
exe
HKLM,SOFTWARE\Lucent\SoftModem,CallProgressPlayThreshold,1,a0,1f,00,00
(Launch LTSMMSG.exe upon Windows boot-up and specify the audio sample
playback latency.)
If the PC OEM requires just the system audio support, the following line will
disable user messaging functions in the INF file(s) for each operating system.
[PortMod.AddReg]
HKLM,SOFTWARE\Lucent\SoftModem,SoftModemMsgDisable,1,FF,FF,FF,FF
This system audio support is officially implemented from version 3.1.90 release
and onward.
Intel Confidential – Controlled Access
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