Often, replaced with fiber patch bays, DSLAMs, etc. Then you have the same gear duplicated for CLECs that have colocation. At one point AT&T was claiming that C

Often, replaced with fiber patch bays, DSLAMs, etc. Then you have the same gear duplicated for CLECs that have colocation. At one point AT&T was claiming that COs were full/that there was no more space for CLEC colocation. In larger cities some were repurposed as MSCs for cell service.