I had unpacked new 6424D+ phones.
When I plugged them onto a used port, I hear a continuous loud tone.
I had tested with few new ones with the same problem.
I can not compose any number.
If I put back the old one, there is no problem
I think that there should be something to do on the phone, but what ???
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My mother's portable handsets needed battery replacements, and since the
older model required harder-to-find, more expensive batteries, we opted
to get her a whole new set. These are fairly light weight, but feel
sturdy. All batteries and necessary equipment was included. The base has
a nice handset location feature - when you press the button, all the
handsets will make tone noises so you can find them and will continue to
do so until you've seated all handsets in the cradle or until you press
the button again. Other sets I've seen really required two people -
where one would have to keep pressing the button while the other person
did a hunt-n-seek. This is far more practical if you're home alone
and/or live alone and have misplaced a handset. There are 10 ringtones
available - these are the loud MIDI type tones, not the pretty melodies
you get on an iPhone - but they range from loud ringer to melodic and
each handset can be set to a different volume. The base station needs to
connect to a phone line, but the other handsets need their bases
connected to power only. This is a great feature for those who live in
older homes where the phone jacks are few & far between... and gives
you more choices on where to locate a phone. My mother & I have
conversed on the phone - she can hear me really well and vice versa. So
far, the units have a very acceptable battery life before draining
enough to cause noise. This is a nice ensemble at a very reasonable
If you Take the first phone that is loud and plug it in to position 2&3 do you have the same loudness. Please do it to each instrument to ensure that one is not a faulty unit.But you can get a lower voltage of dialtone having three units in series with each other. BEST REGARDS John
Try disconnecting the cordless phone base unit from the phone jack where it's connected and plug in a basic corded phone. If you still have the noise, the trouble is in the phone line itself and you'll need to contact your telephone service provider.
If the phone line isn't at fault, the trouble is in the base unit. Most likely, the power supply filtering isn't working, and you're hearing hum in the audio as a result. If the base unit uses an external plug-in adapter (a "wall-wart") with a DC output, you can try replacing it with a new one. Radio Shack sells replacements. Just be sure to get one with the same voltage rating, the same or higher current rating, and the right polarity plug. It may be that the old adapter isn't filtering any more because of its age.
If the adapter is an AC output type, or the base has a built-in power supply with a regular AC power cord, you should probably shop for a new phone. The trouble is in the unit itself, and you'll spend more trying to have it fixed than it's worth.
When you are talking on the phone (or listening to a dial tone), the volume control works to control the volume of the receiver. When the phone is not being used, the volume control is used to control the volume of the ringer.
Locate phone away from devices which may interfere, basically anything with a transformer. Dont use long extension cords to connect phone to a wall jack that is far away. Plug ac power adaptor into spike-strip line filter like an isobar. Try another extension cord and/or a different location to see if you can isolate the cause of interference. Interference will get in 1 of 2 ways, through the phone line, or through the power supply.