Terms

Telephone Systems

Telephone Systems Library of Congress: Scope Note Narrower Term: Digital telephone systems Narrower Term: Telephone Multiplex systems Narrower Term: Telephone Private branch exchanges Narrower Term: Telephone switching systems, Electronic Narrower Term: Centrex telephone service Narrower Term: Audiotex Narrower Term: Internet telephony Narrower Term: Cellular telephone systems Narrower Term: Text messages (Telephone systems)
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