Conference and Participant Level Operations
Polycom, Inc. 392
● Although PCM is successfully initiated on Microsoft Office Communications client or Lync client, since
FECC feature is not available on these clients none of the PCM options are accessible as the only
available keys are #,*,1..9 and not the navigation keys ("LEFT", "RIGHT", etc.).
Modifying the PCM_FECC System Flag
The PCM_FECC System Flag determines whether the DTMF Code, ##, the Arrow Keys (FECC) or both will
activate the PCM interface. In addition, this flag can be used to disable the PCM.
Possible Values: YES / NO
Default: YES.
The table below summarizes the combined effect of the DTMF Code and PCM_FECC System Flag settings
on the system.
For more information see Modifying System Flags.
PCM_FECC / DTMF Code
PCM_FECC= DTMF Code Effect on System
YES
Defined Both DTMF Codes and Arrow Keys will activate PCM.
Deleted
Only the Arrow Keys can activate PCM.
Once PCM is activated the Arrow Keys lose their FECC functionality.
NO
Defined
Only the DTMF Code can activate PCM.
Once PCM is activated the Arrow Keys lose their FECC functionality.
Deleted PCM is disabled.