SA US2-40 firmware version question

[Uncle Michael]

A bit off topic, but hoping to find a knowledgeable audience.
I know that older SA transmitters were not fully compatible with a split-phase repeater (could receive but not transmit between legs), but it is my understanding that recent devices are compatible. I'm hoping someone on the Board can confirm that. I'd also appreciate some guidance on how to tell from the firmware version which ones are and are not compatible?

[Overst]

I have an installation with 6 split phase repeaters (over 220 upb devices) 4 Splitters are PCS and 2 are HAI brand. All of the UPB devices are Simply Automated. They all work fine.

[Uncle Michael]

All of the UPB devices are Simply Automated. They all work fine.

Thanks. I guess that is as good a confirmation that current SA switches work with repeaters as I could ask for. Do you know what firmware version(s) they have? When were they purchased?

[Overst]

Firmware the repeaters are or firmware the switches are?

[Uncle Michael]

The switches. If all your switches are installed it's not worth pulling one out - just wondering if you know. When you purchased the switches will be almost as useful.