Incoming Landline Phone Calls That Just Show "Incoming Call" on Call Display and Aren't Missed Calls

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Helpful Neighbour

I occasionally receive an incoming call on my Panasonic landline that shows nothing in call display but "Incoming Call". I don't ever answer and the call eventually disappears without ever being subsequently registered by my phone as a missed call. Just before the call drops the phone quickly flashes a  "line in use" message. Normally the phone shows "Incoming Call" for a second and then having learned the number involved, flashes that number or say a province name.

 

Anybody have an idea what these peculiar calls are doing - beyond that they are spam? 

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Helpful Neighbour
Should mention I have a free Telus fax number associated with my phone as well...
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Ambassador

I think it is a quirk of Panasonic cordless phones.  I have seen that happen over the years and there is some Caller ID information on my corded Nortel Vista phone but not on the panasonic.  I can't be certain but that is the best explanation I have.

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Helpful Neighbour
Thanks for the reply but this is not a cordless phone I am seeing the problem on. Note... none of the many Amazon reviews of this (KX-TGF350 series) phone mention such an issue happening. It was actually the winner of Google reviews of best-landline-of-the-year when I bought it.
 
It appears to be that the suspicious incoming calls never get sensed as having an originating number source, which is supposed to happen after one ring. Guess I will just have to pick up the receiver and listen the next time to confirm whether it is some sort of spam or not.
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Ambassador

By "free fax number" do you mean you have a second, smart ring, number associated with your landline?

 

Do you have a fax machine sharing the landline?

 

If you call the fax number, does the Panasonic phone behave as you describe?

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Helpful Neighbour
First question: Yes.

2nd Question: a Brother (MFC-L2750DW) printer with fax capability connected to the phone.

3rd question: no. The phone correctly registers the call as coming from a private caller (I used Google hangouts on my PC) and I see/hear the call answered and the resulting fax tone before hanging up.
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Helpful Neighbour
Footnote... I'll have to see what the printer LED console is saying when the next such call comes in...
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Rockstar

Can you try the star code to find out the last number that called you and see what it says?

 

https://www.telus.com/en/on/support/article/use-star-commands#call_trace

 

Make sure not to use the call trace one unless you want it reported to the police.

 

 

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Helpful Neighbour
Thanks for the suggestion! I can certainly try that the next time I spot it happening.