I think the L100s dated to the late 70s/early 80s. I can't find it's big brother, the L200 online anywhere either.
The L100 was a multi-rack system stuffed full of cards (I think 4 racks wide) with dark blue panels that could be removed to access the innards. There was a terminal output and a shelf where the fixture for board test sat. I seem to remember the ones we had talking to a VAX somewhere else in the building.
They were cool but ancient devices when I was working with them in the 90s. I suspect they're all gone by now.
Last thing we got before Lucent went to shit was a Teradyne Z system (Z99? can't remember) - just remember the thing was very unergonomic, you leaned across a big top plate to place the board in the test fixture, and it sat directly on the floor. At least the HP3070s leaned tilted so you could drop the board on them.
Lucent pillaged a few of our engineers and opened a site in S. Portland Maine in the late 80s, early 90s, it became Agere around 2002.
If we had an awkward test head like that, we would have designed and built a stand to allow it to easily mate to our handlers (IC Test, not board test). It was great having an in-house machine shop!
Ah, Agere. The old joke was "What's that noise? Just a company changing Agere without a clutch..." The much vaunted Western Electric semiconductor division vanished with barely a whimper into Agere, which got bought by...someone. Can't remember now.
We had a shop that could have done the work, but I think by the time the Z system showed up, it was well understood that Switching and Network Systems wasn't long for this world.