We went through a lot of these peripherals in
the1990s. The last 3350
we got went to a collector. The 3550s were usually controlled by a
3880 which could handle up to 4 of them, if I remember correctly.
3350s were originally controlled by the 3830. I do not think all 3880s
could control 3350s - there may have been a microcode upgrade
involved.
I am always on the lookout of a 3880 and 3380s. And more 3350s, for that matter.
--
Will