You haven't been in the business until you have had to stand on top of the toilet to access the phone wiring
One job I worked on, the phone system and wiring was in one room, but all the lines came in, where else, but a closet in the bathroom.
Sadly, our phone system is in the bathroom, it's a completely open office originally built in 1910 and the only enclosed room is the bathroom. When we moved in the basement had 3 inches of standing water and so we opted to put it in the bathroom on the main floor instead of the basement. I have a few pictures somewhere of the PBX vendor sitting on the toilet programming away on a laptop. It's rather funny. Heck, up until about 6 months ago we also had 3 servers in there.
Not bad really, the worst I have had is for a restaurant where the phone line comes into a little room right where the main vent hoods exit the building. Might not sound bad...but then you have never seen vent hoods for an older restaurant.
The whole area is just covered with old used grease that has been dripping out of the vent hoods