Unitrunker Encrypted voice question

[batdude]

simple question - (and yes, I have searched both here and on the web)


Can Unitrunker mute encrypted (provoice) voice on an EDACS system?



thanks

doug

 

[Unitrunker2]

This was answered on the mailing list. The simple answer is no. Users check the Lockout button on known encrypted talkgroups.

Look for the "Backlog" email dated April 16.

 

[lwvmobile]

As far as my own research into the matter has ever yielded, I don't believe the EDACS ESK control frames actually specify whether or not a channel is encrypted or not encrypted. I have some notes on the frame types and the MT-1 and MT-2 values used, and as far as I can tell, they only specify these parameters:

MT-1 and MT-2

MT-1:
00001 - TDMA Group Voice Channel Assignment
00010 - Group Data Channel Assignment
00011 - Digital Group Voice Channel Assignment
11111 - Use MT-2

MT-2:
0000 - Initiate Test Call Command
1101 - Serial Number Request (would this be a join?)
1111 - Undefined
NEW MT-2 INFO (unverified)
1010 - Site ID Relay??
0001 - Peer/Neighbor Site Relay??
1011 -- Unknown? Kick?
1100 -- ADD

and SLERS specifically seems to use Digital Group Voice Channel Assignment, or at least, that is the only one I've ever really observed.

I seem to recall other call types as well, such as analog, but can't say I've ever observed any of them on SLERS Site 243 as that's the primary one I can I monitor, but again, its also been about 10 months since I've worked on any of this myself. Gets kind of boring listening to a bunch of encrypted channels, so I just have to blacklist them.