An office building near my house (built in the 70s, 3 story medium size building) is served by:
0) abandoned copper, 100 plus pairs just hanging off the wall.
1) fiber to an DSC Litespan cabinet, copper out for POTS, uverse, and T1s
2) fiber to a Ciena unit, metro ethernet circuits out
3) fiber to a Cisco unit, metro ethernet circuits out (tenant gone)
4) fiber to an Adtran unit, coax DS3 out (tenant gone)
5) fiber to a Westell unit, 25 x 2 pairs out to a 24 slot smartjack cab
6) 50 pair copper, 2 or 3 pairs in use
7) Spectrum cable
