I'm running a bunch of SPA525G phones on an Asterisk BE C.2.4.4 system. With firmware 7.2.5 the side car keys function as BLFs and one touch transfer keys. When I upgrade the phone to 7.4.3, the sidecar buttons will not do one touch transfer. When I click them, it puts my current call on hold, and calls the target extension on a second line.
I have to use 7.4.3, because on 7.2.5 the phones keep locking up. It seems like there's a flag or simple option that makes the sidecar keys work as xfer keys that is missing from the other firmware. I see a couple other posts about this, so it looks like a new problem. Anyone have any ideas?