pdf 518-010-109 i2 Aug79 - Voice Station Signaling on Manual Intercoms Popular
By Paul F 1953 downloads
518-010-109_I2.pdf
Identification, Installation and Maintenance. Uses a 107B SPOKESMAN loudspeaker set with a 6-, 10-, or 20-button telephone set, or CALL DIRECTOR telephone sets. [Extracted from KSSM, i6, July 1980 by Sam Etler]
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