Sound of a police siren (or similar) from phone

[EricG-38]

Hi

Some months ago I switched to the BT Digital phone and recently to  Halo 2.  I have a digital phone and my original Panasonic wireless phone with the base station plugged into the Router phone connection. Normally this works fine but in recent weeks I occasionally get athe sound of a siren, similar to the police car siren, from the Panasonic analogue phone.

Does anyone else get this problem and can anyone suggest the cause for this wierd behavooir?

[Devon_Dave]

Not sure if it's the same but on the old analogue PSTN that you would have moved from. If you left tho phone off the hook the telephone exchange woukd have sent this siren type noise to your phone. It was known as The Howler. 

[EricG-38]

Thanks for that - I shall check my phones next time it occurs but I don't think that was the case.  Before I switched to the digital phone system if I left a phone connected it made a continuous whine and eventually switched off. I did wonder whether this siren noise was connected in any way to the Halo system and the EE backup but I shall make a point to check all my handsets next time it occurs.