Re: Quiet or no dial tone in a GPO 706
Can you now test between T19 & the ASTIC pin 4. It should be a low reading with the switchhooks up & no reading (normally 1. on a digital multimeter) with them down.
If this is the case then you should have continuity from T3 to T19
Last edited by WayneL74; 17th May 2020 at 8:59 pm.
Reason: Possible error
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