Packet Switching Public Digital Network
Packet Switching Network， PSN
Packet Switching Network
packet switching data network
packet switching computer communication network
pack switching service network
packet switching service network
Optical Packet Switching Network
NSS Network Switching Subsystem
NSN Network Switching Node
NSC Network Switching Center
nonblocking switching network
network switching system
network switching processor
Optical Burst Switching Network
packet switching telephone network
public switching telephone network
Public Video Switching Network