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21712 posts

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+1 received by user: 4504


  Reply # 73542 5-Jun-2007 22:08
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Ack, it ate my reply...

I would have thought that from even 80mW that the range would be a lot better then it is, I cant even get from the house to around the back of the shed which is at most 30 meters from where the base station was. If it was in the window facing the yard then it works ok in the yard, but not the garage. Move it to the other end and the garage is ok, but not the yard etc etc.


3539 posts

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  Reply # 73543 5-Jun-2007 22:17
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Yeah, I had similar experiences with standard cordless phones, they just don't go very far at all.

There are two things I found that made a heck of a difference for those situations where you need the longer range:

1)  Buy a 500mW long-range cordless phone (Voyager or similar)
2)  Use an Outdoor Aerial

With those two pieces of gear I have reliable coverage over 1 to 1.5km even through some dense bush in the remote corners of our farm.  If it was direct line-of-sight, the range would be up to 8km.

An Outdoor Aerial on its own makes a huge difference.  Mine is a "Ground Plane" type 5/8 wavelength mounted on a "Hockey Stick" type of pole from the barge board on the end of our cottage.  The range was multiplied by at least 5x (if not 10x) when I installed the outdoor antenna.  Trouble is, not many of the cheaper cordless phone bases have any provision for an external aerial.


3267 posts

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+1 received by user: 77


  Reply # 73552 5-Jun-2007 23:09
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NETY: Bluetooth v2.0 and later does selective hopping and avoids frequencies used in it's surroundings, DECT simply hops between channels for security and does not avoid troublesome frequencies in it's surroundings.  The difference lies in >adaptive< hopping.

Interference is reduced in DECT by having the average transmitting power spread over different frequencies rather than being one powerfully transmitted frequency.  I.e. spread spectrum.

You can never have enough Volvos!


2 posts

Wannabe Geek

  Reply # 74477 13-Jun-2007 10:18
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Thanks everyone - I ended up getting a cheap cheap cheap Panasonic ($50!) which seems to be doing the trick.

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