PRESS BUTTON UNIT No. 53 | |||||||||||||||||||||||||||||||||||||||||||||||||
This a press button unit that consists of a 10 button keypad marked 1 to 0. The keypad is LD (Loop Disconnect) only. Used on Telephone No's 755, 756 & 758.
PBU No. 53B/3 (GNA)
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Last revised: September 27, 2024FM |