This is happening too often, triggered by unrelated random non-reproducible behavior: Two phones that share the same "Shared Line Appearance" extension suddenly have their line LED red, and when that line button is pressed the display says "Share Call Active" and lists another unrelated extension. The only way to turn this off is by power cycling one of the phones.
Does anyone know what this "Share Call Active" message means? That message does not appear in any of the SPA9000/400/504g docs.
We are also seeing alot of other SLA problems, like LEDs not show the correct state of an SLA extension. Or calls from FXS lines to SLA extensions not ringing properly. I'm beginning to think using SLAs should be avoided.