Monitoring signaling bits

Once battery is enabled, the DSP can monitor signaling bits. This topic describes how to:

• Start signal detection

• Stop signal detection

Starting signal detection

To start on-board monitoring of the signaling bits for a station, invoke cdiStartSignalDetector. In the invocation, pass a pointer to the CDI_SIGNALDETECTOR_PARMS structure.

If monitoring is started successfully, cdiStartSignalDetector returns SUCCESS, and signal monitoring events are enabled. Subsequent events indicate bit state changes.

Stopping signal detection

If enhanced mode is enabled, the DSP automatically stops detecting signaling from a station when the station goes on-hook (CDIEVN_ON_HOOK is returned). If enhanced mode is disabled, the application can invoke cdiStopSignalDetector to stop detection.

If the station is on-hook, and cdiStopSignalDetector is invoked, CTAERR_FUNCTION_NOT_ACTIVE is returned.