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public switched telephone network
abbr., telecom.	public switched phone network (ssn)
IT	A communications system that sets up a dedicated channel or circuit between two points for the duration of the transmission.
Public Switched Telephone Network
abbr., file.ext.	PSTN
IT, abbr.	PSTN (IN)
Public Switch Telephone Network
abbr., comp., net.	PTSN

public: 15 phrases in 6 subjects

Abbreviation	8
Education	1
Librarianship	2
Non-governmental organizations	1
Trademark	2
United Nations	1