When someone rings me, my phone often rings once then cuts out, It is always possible for me to phone out with no problem. I have been told that this is often caused by a short in the phone line which causes a voltage drop that makes the phone think that it has been answered. Telecom have checked up to my phone entry point and say all is ok up to there, so the fault is in my house. I do not have a wiring contract with them.
The only way I can reliably receive calls is by diverting the phone to my cell phone. I am on ADSL2+, and connection speeds are excellent.
The 3 year old house has a wired-in master ADSL filter, with structured CAT5 distribution for both phone and computer network. I have found that by unpluging the ADSL connection to the modem, the problem disappears. I have tried using another old modem but the problem re-appears, so the modem is not causing it.
I am wondering whether the problem may be caused by a fault in the ADSL filter. Is there a way of checking whether it has a fault? The wiring to it appears complicated! The other thought I have is to go to VOIP (I am on XNET). Do voice calls over VOIP require the POTS line voltage to make the phone ring? If not, that may solve the problem.
Does anyone have any ideas on the cause or solution - and whether VOIP is the answer?