Actions

Mobiletech Communications Data Network South Bristol

From The RadioReference Wiki

Data Network - South Bristol

There appears to be a data network using 4800 xPSK modems tied to radios registered on the South Bristol site. There are a large number of TGIDs associated with these modem calls, both on the network, and in/out of the network.

The TGIDS in the 240 - 247 range are normally Token TGIDs that are used for calls in/out of the network (phone, data, etc.). They appear to be used sequentially with an auxiliary LTR-Net message. The decoder is not translating the aux messages correctly, so disregard the OSW text for the aux messages.

20130601 060438 LTRNet [*] OSW 0 05 05 244 11 36 CALL LCN:05 TOKEN TGID [0-05-244]      [10101100000001010010111110100010110110110]
20130601 060438 LTRNet [*] OSW 1 03 01 011 21 18 CALL LCN:03 TGID [1-01-011] FREE:21    [10101100001000110000100001011101010011000]
20130601 060439 LTRNet [*] OSW 0 31 05 244 11 07 CEND CALL END TGID [0-05-244]          [10101100000111110010111110100010110000111]
20130601 125821 LTRNet [*] OSW 0 05 05 245 11 54 CALL LCN:05 TOKEN TGID [0-05-245]      [10101100000001010010111110101010111010100]
20130601 125821 LTRNet [*] OSW 1 03 09 011 29 74 CALL LCN:03 TGID [1-09-011] FREE:29    [10101100001000110100100001011111011110100]
20130601 125823 LTRNet [*] OSW 0 31 05 245 05 76 CEND CALL END TGID [0-05-245]          [10101100000111110010111110101001011110110]
20130601 132616 LTRNet [*] OSW 0 05 05 246 09 74 CALL LCN:05 TOKEN TGID [0-05-246]      [10101100000001010010111110110010011110100]
20130601 132617 LTRNet [*] OSW 1 03 17 011 29 69 CALL LCN:03 TGID [1-17-011] FREE:29    [10101100001000111000100001011111011101001]
20130601 132618 LTRNet [*] OSW 0 31 05 246 05 51 CEND CALL END TGID [0-05-246]          [10101100000111110010111110110001011010001]
20130601 145301 LTRNet [*] OSW 0 05 05 247 11 11 CALL LCN:05 TOKEN TGID [0-05-247]      [10101100000001010010111110111010110010001]
20130601 145302 LTRNet [*] OSW 1 03 25 011 29 1C UNID                                   [10101100001000111100100001011111010011100]
20130601 145302 LTRNet [*] OSW 0 31 05 247 05 33 CEND CALL END TGID [0-05-247]          [10101100000111110010111110111001010110011]
20130601 154300 LTRNet [*] OSW 0 05 05 240 09 3A CALL LCN:05 TOKEN TGID [0-05-240]      [10101100000001010010111110000010010111010]
20130601 154302 LTRNet [*] OSW 1 02 01 011 29 50 CALL LCN:02 TGID [1-01-011] FREE:29    [10101100001000100000100001011111011010000]
20130601 154302 LTRNet [*] OSW 0 31 05 240 05 1F CEND CALL END TGID [0-05-240]          [10101100000111110010111110000001010011111]
20130602 012928 LTRNet [*] OSW 0 05 05 241 11 5F CALL LCN:05 TOKEN TGID [0-05-241]      [10101100000001010010111110001010111011111]
20130602 012928 LTRNet [*] OSW 1 02 09 011 29 25 CALL LCN:02 TGID [1-09-011] FREE:29    [10101100001000100100100001011111010100101]
20130602 012930 LTRNet [*] OSW 0 31 05 241 05 7D CEND CALL END TGID [0-05-241]          [10101100000111110010111110001001011111101]
20130602 020820 LTRNet [*] OSW 0 05 05 242 09 7F CALL LCN:05 TOKEN TGID [0-05-242]      [10101100000001010010111110010010011111111]
20130602 020821 LTRNet [*] OSW 1 02 18 098 29 19 CALL LCN:02 TGID [1-18-098] FREE:29    [10101100001000101001001100010111010011001]
20130602 020822 LTRNet [*] OSW 0 31 05 242 05 5A CEND CALL END TGID [0-05-242]          [10101100000111110010111110010001011011010]
20130602 034827 LTRNet [*] OSW 0 05 05 243 11 1A CALL LCN:05 TOKEN TGID [0-05-243]      [10101100000001010010111110011010110011010]
20130602 034829 LTRNet [*] OSW 1 02 25 011 29 4D UNID                                   [10101100001000101100100001011111011001101]
20130602 034829 LTRNet [*] OSW 0 31 05 243 05 38 CEND CALL END TGID [0-05-243]          [10101100000111110010111110011001010111000]
20130602 043712 LTRNet [*] OSW 0 05 05 244 11 36 CALL LCN:05 TOKEN TGID [0-05-244]      [10101100000001010010111110100010110110110]0
20130602 043712 LTRNet [*] OSW 1 03 01 011 29 01 CALL LCN:03 TGID [1-01-011] FREE:29    [10101100001000110000100001011111010000001]
20130602 043714 LTRNet [*] OSW 0 31 05 244 05 14 CEND CALL END TGID [0-05-244]          [10101100000111110010111110100001010010100]

If you look at just the auxiliary messages, most have the same bits, with a 3-bit counter in the beginning.

                                                  sync        a      cnt 16-bit id?       crc
20130430 224144 LTRNet [*] OSW 1 02 29 010 29 55 [101011000 0 1 0001 011 1010000101011101 1010101]
20130501 033338 LTRNet [*] OSW 1 03 09 011 29 74 [101011000 0 1 0001 101 0010000101111101 1110100]
20130501 180355 LTRNet [*] OSW 1 02 01 011 29 50 [101011000 0 1 0001 000 0010000101111101 1010000]
20130501 212930 LTRNet [*] OSW 1 02 10 027 29 2E [101011000 0 1 0001 001 0100001101111101 0101110]
20130501 233759 LTRNet [*] OSW 1 02 18 138 29 37 [101011000 0 1 0001 010 0101000101011101 0110111]
20130502 004203 LTRNet [*] OSW 1 02 25 011 29 4D [101011000 0 1 0001 011 0010000101111101 1001101]
20130502 013304 LTRNet [*] OSW 1 03 02 087 26 7B [101011000 0 1 0001 100 0100101011111010 1111011]
20130502 031857 LTRNet [*] OSW 1 03 10 138 29 7B [101011000 0 1 0001 101 0101000101011101 1111011]
20130503 003242 LTRNet [*] OSW 1 02 18 251 25 05 [101011000 0 1 0001 010 0101111101111001 0000101]
20130503 025352 LTRNet [*] OSW 1 02 26 138 17 56 [101011000 0 1 0001 011 0101000101010001 1010110]
20130504 011357 LTRNet [*] OSW 1 03 25 011 29 1C [101011000 0 1 0001 111 0010000101111101 0011100]
20130504 021706 LTRNet [*] OSW 1 02 03 138 25 4D [101011000 0 1 0001 000 0111000101011001 1001101]
20130504 153603 LTRNet [*] OSW 1 03 17 011 29 69 [101011000 0 1 0001 110 0010000101111101 1101001]
20130601 060438 LTRNet [*] OSW 1 03 01 011 21 18 [101011000 0 1 0001 100 0010000101110101 0011000]
20130601 125821 LTRNet [*] OSW 1 03 09 011 29 74 [101011000 0 1 0001 101 0010000101111101 1110100]
20130601 132617 LTRNet [*] OSW 1 03 17 011 29 69 [101011000 0 1 0001 110 0010000101111101 1101001]
20130601 145302 LTRNet [*] OSW 1 03 25 011 29 1C [101011000 0 1 0001 111 0010000101111101 0011100]
20130601 154302 LTRNet [*] OSW 1 02 01 011 29 50 [101011000 0 1 0001 000 0010000101111101 1010000]
20130602 012928 LTRNet [*] OSW 1 02 09 011 29 25 [101011000 0 1 0001 001 0010000101111101 0100101]
20130602 020821 LTRNet [*] OSW 1 02 18 098 29 19 [101011000 0 1 0001 010 0100110001011101 0011001]
20130602 034829 LTRNet [*] OSW 1 02 25 011 29 4D [101011000 0 1 0001 011 0010000101111101 1001101]
20130602 043712 LTRNet [*] OSW 1 03 01 011 29 01 [101011000 0 1 0001 100 0010000101111101 0000001]