I know the TA-850 is ancient at this point, but I was wondering if anyone knows the difference between the two model numbers for FXO cards: 1175407L1 and 1175407L2. I need to source a couple FXO cards for some TA-850s still in service, but I can't figure out if I should get the L1 or L2 model or if it even matters.
Thanks!
