pdf 551-720-210 i3 Mar79 - Switching Cabinet - 761B PBX Popular
By Paul F 579 downloads
551-720-210_i3_Mar79_Switching_Cabinet_761B_PBX_tci_ocr.pdf
See "Phone Service for Small Motels - The 761A PBX Switch and 543D Desk Set" in Singing Wires, September 2016. Contributed by Paul Wills. Processed by Paul Fassbender.
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