The Global Call API provides network device independence by shielding the application from protocol-specific details while giving access to each protocol's full range of features.
Since global tone detection (GTD) tones are used for call analysis, the tone definitions are sent to the firmware when the gc_OpenEx( ) function is issued. The voice channel must be idle. Any pre-existing tones are deleted.
CAUTION
The application must not delete tones after the tones are downloaded, or the protocol will fail.
If the application requires additional tones after the initial set of tones are loaded, they must be redefined after calling the gc_OpenEx( ) function. The tone IDs cannot be in the range from 101-189.
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