Omega Owners Forum

Chat Area => General Discussion Area => Topic started by: alunonhisown on 23 January 2010, 22:10:50

Title: Going Tetra
Post by: alunonhisown on 23 January 2010, 22:10:50
The police have been Tetra for two years, and now the bloody fire service and ambulance service are to go Tetra on February 15th.
All scanners will be worthless.
What is a young widow going to do of an evening and where will she get all the gossip from?
Bloody Government, no consideration
Title: Re: Going Tetra
Post by: waspy on 23 January 2010, 22:13:26
Does this mean we're going to have even more of your waffle ;D
Title: Re: Going Tetra
Post by: alunonhisown on 23 January 2010, 22:14:24
Looks that way ;D ;D ;D ;D ;D ;D
Title: Re: Going Tetra
Post by: Gaffers on 23 January 2010, 22:14:25
Get an icom which connects to the PC and do some searching on the internet to find out how to decode :y
Title: Re: Going Tetra
Post by: Welung666 on 23 January 2010, 22:14:43
You'll be a Knight by March at this rate Di ;D ;D
Title: Re: Going Tetra
Post by: KillerWatt on 23 January 2010, 22:15:51
Quote
The police have been Tetra for two years, and now the bloody fire service and ambulance service are to go Tetra on February 15th.
All scanners will be worthless.
What is a young widow going to do of an evening and where will she get all the gossip from?
Bloody Government, no consideration
Get out more perhaps?

PS

The old bill hate Tetra, it can take anything up to 6 seconds to obtain a channel when calling for help - and by all accounts, 6 seconds is about 4 seconds longer than what is needed to kick a human skull to vegetative state.
Title: Re: Going Tetra
Post by: alunonhisown on 23 January 2010, 22:17:21
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Get an icom which connects to the PC and do some searching on the internet to find out how to decode :y
Look for as long as you like, and look very very hard, cos being a bit of a know all, it can be decoded, but it changes frequency evry press of the mic, so as there are billions of combinations it will NEVER be scanable or decodeable.
Title: Re: Going Tetra
Post by: alunonhisown on 23 January 2010, 22:21:59
Quote
Quote
The police have been Tetra for two years, and now the bloody fire service and ambulance service are to go Tetra on February 15th.
All scanners will be worthless.
What is a young widow going to do of an evening and where will she get all the gossip from?
Bloody Government, no consideration
Get out more perhaps?

PS

The old bill hate Tetra, it can take anything up to 6 seconds to obtain a channel when calling for help - and by all accounts, 6 seconds is about 4 seconds longer than what is needed to kick a human skull to vegetative state.
I am a form believer in the truth, and having spoken to a number of 'officers' in my pub during closed opening hours ;) and seen for myself the physical damage they do to shirts ( a brand new shirt had a black patch on it where his radio was after one shift) I think they who rule us will never admit this and officers will have to suffer.
Title: Re: Going Tetra
Post by: Gaffers on 23 January 2010, 22:25:11
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Quote
Get an icom which connects to the PC and do some searching on the internet to find out how to decode :y
Look for as long as you like, and look very very hard, cos being a bit of a know all, it can be decoded, but it changes frequency evry press of the mic, so as there are billions of combinations it will NEVER be scanable or decodeable.

There is equipment available that can be configured to scan multiple frequencies at the same time, it just depends on how much you care about it and how much effort you want to put into it :y
Title: Re: Going Tetra
Post by: Marks DTM Calib on 23 January 2010, 22:26:32
Given that tetra is a cellular based architecure then even if you could crack it, you are unlikely to get everything unless all parties on the comms your listening to happen to be in the same cell
Title: Re: Going Tetra
Post by: KillerWatt on 23 January 2010, 22:27:26
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I am a form believer in the truth, and having spoken to a number of 'officers' in my pub during closed opening hours ;) and seen for myself the physical damage they do to shirts ( a brand new shirt had a black patch on it where his radio was after one shift) I think they who rule us will never admit this and officers will have to suffer.
The ONLY difference between a (TETRA) police radio/mobile phone is the RF power, other than that it is pure microwave.

I have no doubt that in another 8 years or so time we will start seeing claims from old bill that have suffered burns/cancer/leuky from wearing the handsets all day, but don't ever think for one minute the government gives a shit about your well being when there is money to be made.
Title: Re: Going Tetra
Post by: Del Boy on 23 January 2010, 22:28:07
Quote
The police have been Tetra for two years, and now the bloody fire service and ambulance service are to go Tetra on February 15th.
All scanners will be worthless.
What is a young widow going to do of an evening and where will she get all the gossip from?
Bloody Government, no consideration

We hated it when the police went over to tetra used to have some fun listening to that  :y Still at least we get the town security.
Title: Re: Going Tetra
Post by: Mr Skrunts on 23 January 2010, 22:28:23
Just had a look for the Icom units, they aint cheap are they.  :-/
Title: Re: Going Tetra
Post by: KillerWatt on 23 January 2010, 22:29:47
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Quote
Quote
Get an icom which connects to the PC and do some searching on the internet to find out how to decode :y
Look for as long as you like, and look very very hard, cos being a bit of a know all, it can be decoded, but it changes frequency evry press of the mic, so as there are billions of combinations it will NEVER be scanable or decodeable.

There is equipment available that can be configured to scan multiple frequencies at the same time, it just depends on how much you care about it and how much effort you want to put into it :y
There is also equipment that can decode phone calls (both sides of it) just by telling the scanner the number of the handset you wish to monitor.

Obviously only certain authorities have it, and hands up those that believe the ability to monitor was invented AFTER the ability to make secure  ;)
Title: Re: Going Tetra
Post by: Gaffers on 23 January 2010, 22:31:54
Quote
Given that tetra is a cellular based architecure then even if you could crack it, you are unlikely to get everything unless all parties on the comms your listening to happen to be in the same cell

Geographically it doesn't matter as the network is national, we use them on occasion and have people down in Portsmouth talking to us while we play on the Plain :y

It would seem the best way is to clone one, so you'll have to drug one when they come in Di then nick his radio and clone it...... or just seduce the bugger ;D ;D ;D
Title: Re: Going Tetra
Post by: KillerWatt on 23 January 2010, 22:34:37
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It would seem the best way is to clone one, so you'll have to drug one when they come in Di then nick his radio and clone it...... or just seduce the bugger ;D ;D ;D
Cloning is great for the old analogue stuff mate, hasn't really been a feasible option since about 1996 though.
Title: Re: Going Tetra
Post by: Marks DTM Calib on 23 January 2010, 22:35:57
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Quote
Given that tetra is a cellular based architecure then even if you could crack it, you are unlikely to get everything unless all parties on the comms your listening to happen to be in the same cell

Geographically it doesn't matter as the network is national, we use them on occasion and have people down in Portsmouth talking to us while we play on the Plain :y

It would seem the best way is to clone one, so you'll have to drug one when they come in Di then nick his radio and clone it...... or just seduce the bugger ;D ;D ;D

Your missing the point....as its a cellular based setup, unlike the wan type radio that was used, you can only get transmissions to and from those that are in the same cell as you if you are trying to listen in.

The cells are considerably smaller than the old radio setup and hence much less traffic in each.

tetra supports both multicast and point to point wih most calls being made with the latter (this is the key, its closer to a phone type setup than a broadcast one)
Title: Re: Going Tetra
Post by: Gaffers on 23 January 2010, 22:36:32
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It would seem the best way is to clone one, so you'll have to drug one when they come in Di then nick his radio and clone it...... or just seduce the bugger ;D ;D ;D
Cloning is great for the old analogue stuff mate, hasn't really been a feasible option since about 1996 though.

It'll be encrypted, so you'll need the key which you will only be able to get by brute force (long winded) or by cloning the memory of another Tetra :y
Title: Re: Going Tetra
Post by: alunonhisown on 23 January 2010, 22:39:49
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Quote
Given that tetra is a cellular based architecure then even if you could crack it, you are unlikely to get everything unless all parties on the comms your listening to happen to be in the same cell

Geographically it doesn't matter as the network is national, we use them on occasion and have people down in Portsmouth talking to us while we play on the Plain :y

It would seem the best way is to clone one, so you'll have to drug one when they come in Di then nick his radio and clone it...... or just seduce the bugger ;D ;D ;D
:) :) :) :)I like the sound OOF that :P :P :P :P
Title: Re: Going Tetra
Post by: KillerWatt on 23 January 2010, 22:44:08
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Quote
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It would seem the best way is to clone one, so you'll have to drug one when they come in Di then nick his radio and clone it...... or just seduce the bugger ;D ;D ;D
Cloning is great for the old analogue stuff mate, hasn't really been a feasible option since about 1996 though.

It'll be encrypted, so you'll need the key which you will only be able to get by brute force (long winded) or by cloning the memory of another Tetra :y
As far as I am aware, each key is unique to each handset - and by the time you sniff (and more importantly, decode) the key, the transmission is over.