trunker usage_hex section

[evan]

In the grp.txt and ids.txt files of trunker there is an entry called usage. The trunker docs say:
#01 Emergency Call
#02 DES Encrypted Call
#04 Astro or other Digital Call
#08 Encrypted Astro or other Digital Call
#10 Phone Patch <EDACS only>
#20 Digital Phone Patch <EDACS only>

In my files though, I have a, e, and f listed for many talkgroups. What do these mean? Thanks.
Evan

[wayne_h]

I don't think this is a feature that was documented well.

Basically, the way it works is a bit is flagged when it sees a certain type of activity. But apparently other bits which haven't been documented are being set. Like 0xA would be an Encrypted ASTRO call that was analog DES encrypted. That obviously doesn't make sense.

0xE would be Encrypted ASTRO, regular ASTRO, and analog ASTRO.

0xF would be all indicators.

FYI, you shouldn't see analog encryption with ASTRO or ASTRO Encryption.

-Wayne

[FPO703]

Ummmmmmm ASTRO doesn't do Analog. Only Digital.

[wayne_h]

Exactly, but what I meant was that a TRS 99% of the time will either be analog and ASTRO, or analog and 12kbit encryption. For large systems there are limitations and you'll run across this trying to do both (not ASTRO using it but one TG using one and another TG using the other).

-Wayne

[robbinsj2]

Thinking out loud here. 16 possibilities means 4 bits. Bit 1 (left-to-right) is Astro/Other Digital Encrypted. Bit 2 is Astro/Other Digital (clear). Bit 3 is "DES." Bit 4 is Emergency Call.

Is 2, labeled DES Call, supposed to mean analog encrypted? Shouldn't it be AES (Analog Encryption Standard) instead of DES (Digital Encryption Standard)?

How is just plain analog indicated, 0?

If yes to the above, a tentative table:

Dec Hex Usage        Modulation
 00  0  Reg. Call    Analog (clear)
 01  1  Emerg. Call  Analog (clear)
 02  2  Reg. Call    Analog (enc.)
 03  3  Emerg. Call  Analog (enc.)
 04  4  Reg. Call    Digital (clear)
 05  5  Emerg. Call  Digital (clear)
 06  6  Reg. Call    "Digital (clear)/Analog (enc.)"
 07  7  Emerg. Call  "Digital (clear)/Analog (enc.)"
 08  8  Reg. Call    Digital (enc.)
 09  9  Emerg. Call  Digital (enc.)
 10  A  Reg. Call    "Digital (enc.)/Analog (enc.)"
 11  B  Emerg. Call  "Digital (enc.)/Analog (enc.)"
 12  C  Reg. Call    "Digital (clear)/Digital (enc.)"
 13  D  Emerg. Call  "Digital (clear)/Digital (enc.)"
 14  E  Reg. Call    "Digital (clear)/Digital (enc.)/Analog (enc.)"
 15  F  Emerg. Call  "Digital (clear)/Digital (enc.)/Analog (enc.)"

Finally, is there any way to have Trunker track digital (clear) calls but not digital (encrypted) calls, aside from fiddling around with priorities and the threshold?

[Comint]

Originally Posted by robbinsj2

Is 2, labeled DES Call, supposed to mean analog encrypted? Shouldn't it be AES (Analog Encryption Standard) instead of DES (Digital Encryption Standard)?

As far as I know, DES is Data Encryption Standard, and AES is Advanced Encryption Standard.

Comint