VS1000+1003 VoIP Speaker Phone - VLSI Solution

VS1000+1003 VoIP Speaker PhoneVSMPGHH9. FURTHER HELP9 Further HelpThe VoIP Speaker Phone is a demonstration unit.VLSI Solution Oy recognizes the needs to tune at least the following parameters foractual, mass-produced units.VoIP mode:• Software microphone sensitivity.• Sound pressure level (the default level has been set to be pleasant with the currentdemonstration board and speaker combination at -9 dB of maximum soundpressure).• Optional equalization to optimise speaker frequency response.There are also other features that are to be added to the production version of thesoftware.VLSI Solution is willing to help to tune these parameters for customers who intend tostart mass production of VS1000+1003 VoIP Speaker Phones.NOTE! If you have excessive amount of acoustic echo, i.e. so much signal comes fromyour speakers to the microphone that echo cancellation doesn’t work properly, first readthe document VoIP Acoustic Design (VoipAcoustic.pdf), which is provided in the samedirectory as this document!Rev. 2.20 2009-12-07 Page 29(30)