Re: tetra Digest, Vol 25, Issue 3 - tetra

15 Feb 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  &lt;tetra-request(a)lists.osmocom.org&gt;rg>:
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 Today's Topics:

    1. Air encryption: 1 (Media)
    2. Re: Air encryption: 1 (Sylvain Munaut)

 -------------- Posredovano sporočilo --------------
 From: Media &lt;media06(a)gmail.com&gt;
 To: tetra(a)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 &lt;246tnt(a)gmail.com&gt;
 To: Media &lt;media06(a)gmail.com&gt;
 Cc: tetra(a)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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