My mother decided she wanted to go cordless and selected tbe BT710 Freestyle - big button twin set. Pre-charged it over Friday and took it round and hooked it up Saturday morning. There is significant interference heard (in between a crackle and hiss) which is not present with a corded phone.
First question - are these cordless phones more susceptible to line noise than corded versions or does this have to be external local interference getting in between the base and the handset?
The master socket and phone base unit is located in the hallway of a standard 3 bed semi, close to the front door.
My diagnostic measures so far include:
Removing the master socket faceplate and plugging the phone into the internal master socket - no change Moving the base as far from the master socket as the telephone lead would allow (approx 2m) - no change Plugging the base into the only extension socket (upstairs) rather than the master - no change Powering off the router which shares the splitter with the phone - no change Swapping the splitter for another not-new splitter - no change
My mother talking to the neighbours - they have a cordless phone and do not experience the same problem.
The only thing I can think of that I haven't tried is checking the unit works on another line, or taking our phone round and trying that on her line. The reason that I don't immediately suspect the phone is that, whilst trying to set this new model up, ISTR they tried a cordless phone years ago and gave up on it because of the interference.
Is there a measuring instrument available for hire perhaps that can check for sources of interference?
Having tried the phone and base unit in an upstairs room (and still noted the problem) I would have thought this would eliminate the possibility of interference from a specific local device. I think the phone line comes in over head, so shouldn't pick up noise from the main power supply to the house.
Can anyone suggest other measures to identify the cause please?