Can you explain me what well happen if I set the variable "ignore_display_updates=true" before I make bridge action and what will happen if I set it to false? because I have a problem with FS and Polycom 550: when A call from outside of the FS network to B which is inside, then B answer and transfer the  call to C which is inside also, when C's phone is ringing he see B's caller ID and when he answer, he see A's caller ID. Me I want that he see always caller ID of A. I tried to set "ignore_display_updates=true" in this case B see just C's caller ID when his is ringing and when he answer. There is any way to fix this issue? I am thinking about to set "effective_caller_id_number={$origination_caller_id_number}" but I am not sure if this will work.