For the FXO in the TSU to pass caller ID it does need to be a 1200104L2 or 1200103L2 and running FW=H or higher (H, J, K, or L).
I would verify the Firmware of the module through the TSU menu, but I believe the 1200.104L2 with the EPROM 9200.103-1K is running K FW, and the 9200-103.1H is running FW=H. If this is correct then these two should pass caller ID when received on the POTS line plugged into the FXO port.
If I'm reading the bill of material (BOM) correctly, the 9200.103-1G is for the 1200103L1 and will not support caller ID. (Only the L2 supports caller ID).
Thanks, Patrick, much appreciated!
Couple more questions: Would installing the version K firmware in the older FXO card (the 1200103L1) allow it to support Caller ID? Or were there other hardware changes?
In looking over the boards, they appear pretty much identical with the exception of different part numbers on a pair of PLD chips (probably 22V10's).
Finally: Is there any need/advantage to update to the last version (L, if I'm reading you correctly). If so, could I talk you out of the EPROM image file for such?
The 1200103L1 does not support Caller ID, only the L2 hardware does.
I'm afraid I don't have access to the EPROM images for any of the modules.
So noted. I think I know what might be preventing it from working.
Since I have spares, I'm going to do some further experiments. I will
post the results at a later date.