Is this a hole in the ground that used to be a comms rack?!
This was a handhole, or vault – it contained fiber optic cable and a splice case. For a sense of scale, this is roughly two feet by three feet, and about two feet deep. You can see the remains of some of the fiber optic cable strands coiled in the center, these were inside a splice case. Looked something like this: http://extras.mnginteractive.com/live/media/site46/2013/0504/20130504__05tcafib3.jpg