FAQ » History » Version 5
laforge, 02/19/2016 10:52 PM
add tetrapol faq
| 1 | 5 | laforge | {{>toc}} |
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| 2 | 1 | laforge | |
| 3 | 5 | laforge | h1. [[OsmocomTETRA]] Frequently Asked Questions |
| 4 | 1 | laforge | |
| 5 | 5 | laforge | |
| 6 | |||
| 7 | h2. Can I use [[OsmocomTETRA]] to listen to police radio? |
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| 9 | |||
| 10 | 1 | laforge | No, you cannot. We expect any decent police radio installation to use at least Tetra Air Encryption (TEA1/2/3/4) |
| 11 | or end-to-end encryption. |
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| 12 | |||
| 13 | Also, if this is your interest in this project: Please simply go away, we don't want to talk to you. |
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| 14 | |||
| 15 | 4 | laforge | |
| 16 | 5 | laforge | h2. What about TETRAPOL? |
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| 18 | |||
| 19 | 1 | laforge | Despite the similarity in name, they have nothing in common on the technical side, neither on the physical layer nor the protocol stack. |
| 20 | |||
| 21 | 5 | laforge | As such, [[OsmocomTETRA]] has no relation with or use case in the context of TETRAPOL. |
| 22 | 4 | laforge | |
| 23 | 5 | laforge | See "this TETRAPOL fact sheet":http://www.bakom.admin.ch/themen/technologie/01220/index.html?lang=en for details |
| 24 | 1 | laforge | |
| 25 | |||
| 26 | 5 | laforge | h2. What can I do using your software? |
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| 28 | |||
| 29 | 1 | laforge | You can learn more about how TETRA works on its lowest level! |
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| 32 | 5 | laforge | h2. How can I actually receive TETRA RF signals? |
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| 34 | |||
| 35 | 1 | laforge | You can use any radio that is suitable for your target frequency range. |
| 36 | |||
| 37 | We have so far used the Ettus USRP and USRP2 radios with a variety of different daughter boards, as |
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| 38 | 5 | laforge | well as the [[Funcube_Dongle]] Pro. |
| 39 | 1 | laforge | |
| 40 | |||
| 41 | 5 | laforge | h2. Can your software actually play the voice signal? |
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| 43 | |||
| 44 | 1 | laforge | Currently we have no support for that. However, a yet unreleased proof-of-concept version exists. |
| 45 | |||
| 46 | 5 | laforge | |
| 47 | h2. You are sending GSMTAP messages. Where do I get the TETRA wireshark dissector? |
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| 48 | |||
| 49 | 1 | laforge | |
| 50 | 3 | laforge | We have not written any TETRA wireshark dissector. Researchers in China have done this and |
| 51 | we have convinced them to release their code under GNU GPL, rather than replicating unnecessary work. |
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| 52 | |||
| 53 | This code has since been merged into the official wireshark source code repository, as released by |
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| 54 | wireshark.org. However, we are not sure if any release was made after it had been merged, so you are |
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| 55 | advised to use the latest svn repository from wireshark.org. |
