tetra Digest, Vol 25, Issue 3

Media media06 at gmail.com
Fri Feb 15 15:59:19 UTC 2013


Jea, tnx, I know that in our country having a TEA1... But some
terminal working on clear mode, so this I'm not understanding why they
working on clear, but osmocom show me that we have a air encryption
1...

2013/2/15  <tetra-request at lists.osmocom.org>:
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> Today's Topics:
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>    1. Air encryption: 1 (Media)
>    2. Re: Air encryption: 1 (Sylvain Munaut)
>
>
> -------------- Posredovano sporočilo --------------
> From: Media <media06 at gmail.com>
> To: tetra at lists.osmocom.org
> Cc:
> Date: Fri, 15 Feb 2013 00:31:39 +0100
> Subject: Air encryption: 1
> Here we are... one step further... :)  Air encryption: 1, thisth is
> means that we have encryption tetra network? TEA1 i guess... So that's
> it? If is encryption 1, i can't use speech decoder for voice, right?
>
> Thanks.
>
> Regards.
>
>
> BURST
> CRC COMP: 0x1d0f OK
> SB1 58/05/3/000 type1:
> 001000001111001011110100000000001001001010000000000011111001
> TMB-SAP SYNC CC 000011(0x03) TN 11(3) FN 00101( 5) MN 111010(58) MCC
> 0100100101(293) MNC 00000000000111(7)
> TMV-UNITDATA.ind 58/05/3/000 BSCH CRC=1 SYNC
> TMV-UNITDATA.ind 58/05/3/000 AACH CRC=1 ACCESS-ASSIGN
> ACCESS-ASSIGN PDU: DL_USAGE: Unallocated UL_USAGE: Unallocated
> CRC COMP: 0x1d0f OK
> SB2 58/05/3/000 type1:
> 1000111010100100001111000000110001100110100100000000000000001101100000100000000000000000101000001111111111111101110101110111
> TMV-UNITDATA.ind 58/05/3/000 UNKNOWN CRC=1 BROADCAST
> BNCH SYSINFO (DL 393712500 Hz, UL 383712500 Hz), service_details 0x0d77 CCK ID 0
>         Advanced link: 1
>         Air encryption: 1
>         SNDCP data: 1
>         unknown 0x8: 0
>         Circuit data: 1
>         Voice service: 1
>         Normal mode: 1
>         Migration supported: 0
>         Cell never uses minimum mode: 1
>         Priority cell: 0
>         De-registration mandatory: 1
>         Registration mandatory: 1
>
>
>
>
> -------------- Posredovano sporočilo --------------
> From: Sylvain Munaut <246tnt at gmail.com>
> To: Media <media06 at gmail.com>
> Cc: tetra at lists.osmocom.org
> Date: Fri, 15 Feb 2013 00:54:06 +0100
> Subject: Re: Air encryption: 1
> Hi,
>
>> Here we are... one step further... :)  Air encryption: 1, thisth is
>> means that we have encryption tetra network? TEA1 i guess...
>
> It could be any of the TEA algorithm. I don't think which algorithm is
> used is broadcasted, in theory each radio only supports one of the 4
> algo ... so it's assumed you bought the right radio option :p
>
>
>> So that's
>> it? If is encryption 1, i can't use speech decoder for voice, right?
>
> Nope.
>
>
> Cheers,
>
>     Sylvain
>
>
>
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