Western Electric

SpeakerPhone 55D Control Unit

 

Control Unit SpeakerPhone

55D SpeakerphoneControl Unit SpeakerPhone
(Click Picture to Enlarge)

Bell System Property

Documentation:

SpeakerPhone System 3-Type 660A1 Telephone Set Connections and Maintenance
Section 512-620-460
Issue 3, November 1970

SpeakerPhone System 3-Type
Section 512-620-100
Issue 7, October 1978

SpeakerPhone System 3-Type
565-, 1565-, And 2565-Type Telephone Sets
Section 512-620-420
Issue 4, April 1974

SpeakerPhone System 3-Type
568HAA And 2568HAA Telephone Sets
Section 512-620-430
Issue 2, April 1974

SpeakerPhone System 3-Type
500R/S, 1500S, And 2500S Telephone Set
Section 512-620-410
Issue 3, December 1972

AT&T
Bell System
Bell Labs

 

Related Links:

PicturePhone

http://davidszondy.com/future/Living/picturephone.htm

Contact us:

e-mail: larry @ computerdesignsolutions . com

Computer Design Solutions