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Old 4th Jun 2019, 9:27 pm   #9
AndiiT
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Join Date: Aug 2005
Location: Saltburn-East, Cleveland, UK.
Posts: 1,660
Default Re: GPO planset with external extensions

Hi, from the memory of the Planset that was installed where I once worked, I don't think the MAIN phone should ring when switched through to an external extension, the buzzer operates in sympathy with the ringing cadence instead.

I think that there is a modification to the strapping and ringing converter to allow the main to ring when switched through to an external extension however it may only be applicable to Plan 7, which only has one external extension and not plan 5 which has two extensions.

There's a load of information here and the N diagrams can be found here

Feel free to PM me if you require any additional help

Regards

Andrew
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