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Constant "no number calls" since moving to IP Telephone from landline (Home) (Resolved)


My area has recently been migrated from landline to IP telephony which seems to work well with one exception.  My received calls report 10-20 daily calls from "no number".  There is no call made (no ringing) and no message left, just a report that "no number" called and a time.  OFCOM state it should be addressed to the provider and the Telephone preference service state they can do nothing with marketing or computer generated calls.  This did not happen until switched to IP telephony and has been daily since (coincidentally - I think not).  This appears to be a man-in-the-middle network attack and is therefore worrying (as well as filling my recent calls with rubbish).  Virgin media say they cannot see these calls, yet their system records it on my recent calls log. Anyone else having this problem or have a resolution?




[MOD EDIT: Please see post for an update ]

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On our wavelength
yes gc1028 same thing with me couldn't make any calls untill answer machine sorted I have bt8500 advanced phone all the call times end with the digit 8 with a few call time listed as 63.18, 63.38 and 63.58 how is this possible? I would just like to say this never happened with sky, oh and while I'm in the mood to cancel my VM I've realised it actually changes the time on my handset too, this is a ridiculous state of affairs.

I think this will be the remedy for our issues.

I WILL NOT ASK VM FOR MONEY TO COME UP WITH THIS.Screenshot 2023-04-02 at 05.33.58.png


Hi Majidph.

Welcoming you back onto our forums. Thank you for posting.

Sorry to see you are having issues with our landline service.

Is it just no number calls you want to block? 

If you can elaborate, we would love to help.

Thank you.


Ari - Forum Team

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Just out of interest we’ve had Truespeed installed at work - very impressed - we chose 300mb option and we get 300mb downloads and uploads - ie not throttled.

Anyway they’ve installed VoIP but they have a small box called Grandstream in between the router and the phone. I wonder if this is something Virgin need to look into?? Does this filter errors that are showing up on our phones? When I get to work Monday I’ll try and update with model etc but looking online it looks like a ht801 from memory. Just a thought 

The Grandstream is an ATA ( Analogue Telephone Adaptor ). Similar functionality is built into a Hub 3/4/5 hence the TEL 1 & 2 sockets.

We have a Cisco ATA for our telephone lines one line for the home phone and a second line for the house alarm.

In the ATA devices are 2 settings for Direct IP calls. One to disable making a Direct IP call and one to disable accepting a Direct IP call.

Two clicks, this is how easy it is to prevent Ghost calls.  See my post #401 in this thread for more details.

Virgin Media are not looking at ATAs, they wish to operate an over priced & closed VOIP system where the home user enjoys none of the technical or price advantages of a real VOIP platform.

Removing phone lines from an ISP bundle has been once of the best moves we made.

Knows their stuff

With migration to VoIP (digital voice) they should allow us more features since they would be no such thing as line rental if it's coming through internet connection, at least give more features.


Only VM have migrated to VOIP, customers are limited to POTS, a plain old telephone service via an analogue socket

Can you explain in layman’s terms how to stop this with 2 clicks please?

Sorry for not understanding, you seem very knowledgeable! 

The point is that you cannot do this on a Virgin Media router as this level of tooling is not made available on their hubs.

Hello to anyone in the VM Forum Team / Mod Team,

On Saturday 1st April I posted 2 messages on this thread, message number 693 and 699 both on page 70 and got response. Please can anyone in the VM Forum Team / Mod Team look at those 2 messages and give me a response.