phone rings and person cannot hear me and when I call out no one can hear me
First, try Performing a DPT Pin-hole Reset, see if that helps
Then try a different telephone if you can.
If still the same, try How to connect a phone directly to your Digital Phone Terminal
See if any of those help
grannie58 let us know how that goes after you try the steps above, if still no luck perhaps we can message you directly to investigate further.
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