We have a fault whereby when there is a sudden burst of rain, the modem remains connected to the exchange but there is no on-going connection from the exchange to the network. Disconnecting the line for a few seconds and then letting the modem renegotiate usually (but not always) clears the fault. We have had two BTOR engineers visit and they can find nothing wrong here. A third is due Tuesday (18 February 2014).
I have today started a log on the gateways to which we are connected and hope that this may throw some light on the matter.
My question on this forum is whether there is any conceivable fault on customers' premises where connection can be maintained to the exchange (ie the modem synchronises with the equipment at the exchange) and yet there is no on-going connection to the Internet, and if so please explain what it could be.
It isn't a case of the modem incorrectly reporting synchronisation, because if you pull the line out the synchronisation light goes out.
I would have thought that if a gateway fails the system ought to automatically renegotiate with another. Is this correct?
The top picture shows the fault, and the bottom on a correct connection.
