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baby monitor 49mhz image
Michelle S
Someone told me that cordless phones aren't good to talk on because people with scanners can hear your private conversations. Is this true? Are there any cordless phones that are safe? What about cell phones? Can a scanner hear you on your cell phone too?
Answer
I will expand on the answer given by "silence.." above.
Early cordless phones used analog signals on the 49mHz band and could easily be intercepted by most scanning receivers and by some "baby monitors" that shared the same frequencies.
A little later, cordless phones came out that were on the 900mHz band but still used analog signals. A more expensive type of scanning receiver was required to listen to this band, but it could still be done.
Most newer cordless phones use digital signals and operate on much higher freqency bands. The digital signal must be "decoded" in order to be listened to and this is beyond the capabilities of the average person. While it would be possible for a highly-skilled person to intercept your call, the chances of this happening are remote.
Early cellular phones were also analog and could also be listened to using a scanning receiver, but it was much more difficult as cell signals are constantly switching between towers. You could listen to pieces of different conversations, but it was difficult to stay with any one conversation, and trying to listen to a specific person was nearly impossible.
To prevent people from listening to cell phones, Congress passed a law saying that scanning receivers had to be "blocked" so that they couldn't listen to cell frequencies. The problem with this law was that thousands of "unblocked" receivers were already in use, and that most "blocked" receivers could easily be "unblocked" by simply changing some wiring.
The good news is that, all of the newer cell phones are now digital, and like digital cordless phones, can't be listened to by the average person. There are still some analog cell phones in use (mostly in very rural areas), but effective February of 2008, these will be discontinued.
So, in the case of both the cordless phone and the cell phone, unless you are using very old equipment, you can be fairly sure that it cannot be listened to by the average person with a scanner.
I will expand on the answer given by "silence.." above.
Early cordless phones used analog signals on the 49mHz band and could easily be intercepted by most scanning receivers and by some "baby monitors" that shared the same frequencies.
A little later, cordless phones came out that were on the 900mHz band but still used analog signals. A more expensive type of scanning receiver was required to listen to this band, but it could still be done.
Most newer cordless phones use digital signals and operate on much higher freqency bands. The digital signal must be "decoded" in order to be listened to and this is beyond the capabilities of the average person. While it would be possible for a highly-skilled person to intercept your call, the chances of this happening are remote.
Early cellular phones were also analog and could also be listened to using a scanning receiver, but it was much more difficult as cell signals are constantly switching between towers. You could listen to pieces of different conversations, but it was difficult to stay with any one conversation, and trying to listen to a specific person was nearly impossible.
To prevent people from listening to cell phones, Congress passed a law saying that scanning receivers had to be "blocked" so that they couldn't listen to cell frequencies. The problem with this law was that thousands of "unblocked" receivers were already in use, and that most "blocked" receivers could easily be "unblocked" by simply changing some wiring.
The good news is that, all of the newer cell phones are now digital, and like digital cordless phones, can't be listened to by the average person. There are still some analog cell phones in use (mostly in very rural areas), but effective February of 2008, these will be discontinued.
So, in the case of both the cordless phone and the cell phone, unless you are using very old equipment, you can be fairly sure that it cannot be listened to by the average person with a scanner.
Im thinking about buying one of these baby monitors that you put by the childs bed and i would like to know if
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the radio frequency of a baby monitor can be picked up on a programable police scanner, a friend said he didn't think so, but before i get one for my new grandchild i would like to know if people can listen in?
Answer
YES! Baby monitors CAN BE MONITORED IF you get one of the more inexpensive versions.
Get one that states on the package:
1) Spread Spectrum
2) Scrambled or Encrypted
3) Digitial
Any combo of this like Digitial Spread Spectrum would be best.
Baby monitors operate in one of two bands 46-49MHz and 902-928MHZ. Most of the inexpensive ones are nothing more than a radio transmitter with a receiver that any one can tune in and monitor.
Newer and more expensive models use the 902-928MHz band and use technology like more modern cordless phones like spread spectrum where the transmitter changes frequencies very quickly over a set period.
Fisher Price etc. all make versions that are not easily monitored over the more cheaper models. Read the package if you don't see "spread spectrum" "digital", "scrambled" or "encrypted" on the package DONT purchase it.
YES! Baby monitors CAN BE MONITORED IF you get one of the more inexpensive versions.
Get one that states on the package:
1) Spread Spectrum
2) Scrambled or Encrypted
3) Digitial
Any combo of this like Digitial Spread Spectrum would be best.
Baby monitors operate in one of two bands 46-49MHz and 902-928MHZ. Most of the inexpensive ones are nothing more than a radio transmitter with a receiver that any one can tune in and monitor.
Newer and more expensive models use the 902-928MHz band and use technology like more modern cordless phones like spread spectrum where the transmitter changes frequencies very quickly over a set period.
Fisher Price etc. all make versions that are not easily monitored over the more cheaper models. Read the package if you don't see "spread spectrum" "digital", "scrambled" or "encrypted" on the package DONT purchase it.
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