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How does a SPA indicate “disconnect” when the FXS port of the device is connected to PBX?

April 26, 2017connected device disconnect indicate PBX port spa

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How does a SPA indicate “disconnect” when the FXS port of the device is connected to PBX?

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A. The SPA device will generate a Calling Party Control (CPC – disabled by default). Complete these steps in order to enable this: • Go to the web config-utility. • At the Regional tab, change the value for the CPC duration to some value other than 0. • When the SPA device is the called party, the CPC duration is the voltage drop duration before the dial tone is heard again.