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Case: 1:17-cv-03078 Document #: 901-3 Filed: 08/12/20 Page 594 of 609 PageID #:48610
Page 14
Calibration for Audio Conferencing
It is important to maintain "standard transmission levels" with handsets, speakerphones
and conference phones. The standards that reference "Send Loudness Ratings" (SLR) are
described in the ITU's G. 111 standard and also referenced in the P. 340 standard.
The goal is to maintain a dynamic range >20db as described in the videoconferencing
calibration section. The speech level should average +6db to ensure a comfortable level
at the far end.
In General, the audio level of people speaking in the distant rooms should be about the
same as a person speaking in the same room with you.
Integration to Video Conferencing
Codec Compatibility
The FS-400 and the FS-800 are compatible with almost all video codec's.
Connecting the Codec
The FS-400/800 Output should be connected at line level to a video codec. CTG will
provide the appropriate connecting cable for the particular codec model if known. The
following illustration shows the connection between video codec and the microphone
mixer. For specific illustrations and instructions to connect to commonly used codecs
refer to the support section of www.ctgaudio.com or call CTG support at (904) 880-5125
Codec (Rear Panel): NOTE: This Illustration is a simulated codec panel and does not
represent any particular brand.
14
PGR2020-00079
Shure v. ClearOne
Page 15 of 26
ClearOne Ex. 2169
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