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SPA-400 TSO INSTALLATION AND OPERATING ... - Sigtronics
https://www.sigtronics.com/_pdf/air_pdf/air_intercom_pdf/spa-400.pdf
B. Set audio panel to “Headphone” position, if applicable. C. Turn power “on” and set Volume Control to a low level. (1/4th to 1/3rd open for best signal to noise ratio). D. To adjust the intercom SQuelch for voice activated operation (VOX), it is helpful to have some background noise present. Turn intercom SQuelch
SPA400 problem Echo - Cisco Community
https://community.cisco.com/t5/collaboration-voice-and-video/spa400-problem-echo/ta-p/3115566
We found the problem of SPA400 about calling in and calling out related with mobile system AIS provider (GSM 1800) in Thailand. The problem is the sound is down, so we have solved this problem by turning up the volume (adjusted db in SPA400). As a result, there is the acho sound between conversation.
SPA-400 – AUX Audio Input Installation Wiring Diagram
https://www.sigtronics.com/_pdf/air_pdf/air_intercom_pdf/SPA-400_AUX_Audio_Input_Inst.pdf
OUT AUDIO PANEL. * ICS Load Modification. Add a 1/4 or 1/2 watt resistor per the drawing. The value of the resistor most commonly used is 220 ohms, however, optimum performance can be achieved by selecting the value right for your particular installation. The resistor can be any value between 100 and 1000 ohms and is selected for the best ...
SPA-400 failure mode - Pilots of America
https://www.pilotsofamerica.com/community/threads/spa-400-failure-mode.126438/
Now, the fun part. The original gripe still exists. Plus, now with the intercom turned on, there's no PTT from either side. With the intercom turned off, the pilot's side works great and bluetooth audio is not attenuated. (Yes, I checked the wiring per Sigtronic's troubleshooting guide) I rang out all the wires, and they are good.
no sound from the Incoming calls. | 3CX Forums
https://www.3cx.com/community/threads/no-sound-from-the-incoming-calls.1254/
16:32:22.875 CallConf: nIncoming Call(C:1A): Incoming call from Ln:10003@SPA400 to sip:10003@192 After I pickup call from ext line. I cannot hear any audio from outsider, and outsider also cannot hear me. above is the report from the server status. Please help me. Regards Jimmy
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