No, this has nothing to do with the Union. That equipment is a liability suit waiting to happen if someone removes it without it being fully researched and properly decommissioned. This isn't your home office; you can't just walk in and turn the power off.
If AT&T wanted that tech gone, it would be gone. Trust me. Our CO is almost empty now, compared to what it was before. Why? Because obsolete and unused tech was removed. Some still sits on racks in the back, long-since powered down (and with the decommission stickers to prove it), but they don't remove it because, quite simply, the space is not needed. The digital equipment takes up so much less space than the old stuff that it's not even funny.