I have a yale hsa 3500 alarm , it plugs into the phone socket and dials a phone number when the alarm is triggered.
When I plug it into the phone socket it renders all of my phones dead after about 5 seconds. There is no dialling tone , I unplug the alarm and the dialling tone comes back instantly.
I have been in touch with Yale but they have no idea .
Its not the REN rating as I have tried it with phones in every socket and its fine.
What could be causing the alarm to short out the phone lines ?
It used to work and dial out but has now stopped , the rest of the alarm works fine .
When I plug it into the phone socket it renders all of my phones dead after about 5 seconds. There is no dialling tone , I unplug the alarm and the dialling tone comes back instantly.
I have been in touch with Yale but they have no idea .
Its not the REN rating as I have tried it with phones in every socket and its fine.
What could be causing the alarm to short out the phone lines ?
It used to work and dial out but has now stopped , the rest of the alarm works fine .