Hi, is there a way to offer a "callback if busy" functionality for calls, especially internal ones? If the callee is busy, the calling device shows an option to "callback". If you press "callback" the phone of the caller will ring, as soon as the callee is available again. I read, that SNOM phones support it (via *66 dialcodes?), but I guess the pbx has to support it, too and I am on Yealink anyway. Or has someone a solution that offers similar functionality. I know about the "auto redial" function, this one is not what I am looking for.