Api Troubleshooting - Polycom SoundStructure C16 Design Manual

The Local People Hear Echo Of Their Voices From The Remote Room
This problem is most likely with the remote room's acoustic echo canceller. Have the remote participants
mute their microphone to see if the echo is removed, if so, troubleshoot the remote room's AEC by following
the instructions given previously. For remote people follow the instructions for The remote people hear echo
of their voices from the local room issue described above.
If muting the remote participants microphones did not remove the acoustic echo issue, then check the
routing of the remote audio matrix to ensure the audio from the local room to the remote room is not being
sent directly back to the local room.
Room Gain Is High - What Does It Mean?
Installing SoundStructure Devices discusses room gain and what the acceptable and expected levels
should be for ceiling microphones vs. table microphones. Room gain above +10 dB should be reviewed to
ensure the input gain on the remote audio sources is high enough to get the remote sources to the 0 dBu
nominal signal level expected by the SoundStructure devices.

API Troubleshooting

When using TeraTerm 3.1 and connecting over Telnet, why do I have to select CR-LF
termination for commands sent to SoundStructure and not just CR termination?
As described in Appendix A, SoundStructure devices accept commands sent to it with either CR or CR-LF
terminations. What we noticed is that when using Tera Term in telnet mode, Tera Term terminates
commands transmitted to SoundStructure with two bytes - CR and a Null character - even though only the
CR termination is selected in the Tera Term user interface. This is a bug within Tera Term. The result is that
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