Yealink explains their power light indicator for the T38 as so: I returned to my desk from lunch and the power light was flashing. The next call I tried to make was muted. Anyone experience this? The only thing I thought of was PAGING - which uses intercom and our phones are set to MUTE INTERCOM (for security reasons so people can't sit there and listen to traffic in our office). I tried using the intercom and then went to another office and the power light was not flashing - so that may not be it. Although he said his power light was flashing too when he returned from lunch. I do see that at 12:30 while I was at lunch that the only inbound call was a PAGE (Ring Group - Paging). Can't wait until Yealink gets MultiCast paging added to the T38.