was at a customers house today when they relised there phones were not working. checked every point with a cordless and a plug in landline phone and was not getting a dial tone on either. i then tried ringing the house phone but it said that it was engaged even when there were no phones pluged in. started to think it must be the incoming line but relised that the broadband was still working. so was totally lost rang up talk talk they did a line check which came up clear, they said they would send an engineer out but if it turned out to be a problem in the house they would charge my customer. any ideas on anything i could be missing?