You can thank the CWA for the "That's not my job" mentality. That's how it's looked at. If no one creates a ticket then they are not ging to bother with it. In all likelyhood the group responsible for that equipment probably does not exist anymore so there is no one to issue a ticket to remove it and the CO techs and managers are not going to bring it up because that is just extra work for them. The power to run it is not money out of their pocket so they don't care.
I do not, have not, and will not work for AT&T/Comcast/Verizon/Charter or similar sized company.
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.