Store & forward voice switching
By: International Resource Development Inc.
Contributors: International Resource Development, inc.
Series: Report ;; #145; Report (International Resource Development, inc.) ;; #145.
Publisher: IRD
Published: 1980
Place of publication: Norwalk, Conn., U.S.A. (30 High St., Norwalk 06851)
Language: eng
Number of pages: 161
Subjects: Telephone supplies industry -- United States.; Market surveys -- United States.
Other titles: Store and forward voice switching.
Notes: "January 1980."