Hello Chad,
welcome to the Polycom Community.
This was fixed via:
- VOIP-115996 On phones with call waiting disabled, Busy Lamp Field activity no longer causes call waiting tones to be played.
UC software 5.5.1 and UC Software 5.4.6 should both contain the fix for this.
Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.
Best Regards
Steffen Baier
Polycom Global Services