Telephone Switchboard GPO N1070 (10+30) PMBX

Описание к видео Telephone Switchboard GPO N1070 (10+30) PMBX

This is a short demonstration of my 1961 GPO Private Manual Branch Exchange (PMBX) which is installed in my house. It has capacity for ten exchange lines and thirty extensions. This model is the successor to the AT3796 switchboard and has the extended signalling limits.
I am aware that I slightly misdescribed the plugs as jacks and also the supervisory indicators. I am sure someone will point that out!

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