In Computer Networking PWD Room stands for Premises Wire Distribution Room.
In modern offices the computer networking devices or communication/telephone related equipments are connected centrally and distributed through wires from the Premises Wire Distribution Room(PWD).
Such rooms are often guarded from unauthorised access. Entry to such rooms may require access card and/or password, or a key.
PWD rooms are often air controlled and the devices are monitored very frequently for its up-time.