In the P25 spec, they allow for non-standard extensions. Each manufacturer uses these differently. The answer is to disable any extended feature sets and just use the P25 standard data alone.
Then you have some companies (I won't mention their 3-letter initials) who don't even use the standard P25 data correctly - such as using a SYSTEM BUSY queue to indicate that an I-Call is taking place. Hence, equipment that isn't theirs can never use the I-Call feature, as the other equipment sees that the system is busy. Their reply? That's how THEY read what the spec says! That same company's system uses only one frequency per frequency table (not ironically, ala LTR). While this is compliant with P25 specs, it limits the system to only 16 channels. Joe M. Doug Bade wrote: > It seems that there are APCO P25 emergency > functions and there are ASTRO P25 proprietary > extensions.. The Harris infrastructure deals > with the APCO 25 parts... but seems like ASTRO 25 > radios do not exactly. We are finding a few > issues like this here as we have an 800 > Harris-P25 system, and while the XTS radios do > work on it, their firmware does react differently > as ASTRO P25 is not exactly APCO P25... > > There is a check box in the ASTRO 25 RSS for > disabling non proprietary features, it may > help....I have tried both ways and the emergency > clearing issue is definitely a questionable > compliance issue in ASTRO P25 being APCO P25... > > I hope the compliance lab testing gets it squared > away as to who needs to fix it....There is also a > busy channel lockout type hang on PTT attempts on > ASTRO25 radios too... when we are in message > trunking ( channel assigned per PTT ) mode... the > XTS's are blocked from PTT for a longer than optimum time.. > > Doug > KD8B > > > At 01:41 PM 9/8/2009, you wrote: >> >> We've encountered this issue between Motorola >> infrastructure and non-Motorola subscriber >> units... I believe at the last Daniels >> Electronics seminar I attended, it had something >> to do with the consoles fitting the correct >> status bits for P25 for basic functions, >> however, the majority of the features that >> weren't working on the non-Motorola radios were >> Motorola-specific non-standard status bits being >> sent from the console. The solution for this was >> to not use those proprietary functions of the console :( >> >> On Tue, Sep 8, 2009 at 11:22 AM, Andrew Seybold >> <<mailto:[email protected]>[email protected]> wrote: >> >> >> Will—have not seen the problem but if you cannot >> find a solution I can put you in touch with the >> right people at Ma/COM, now Harris. >> >> >> >> Andy >> >> >> >> From: >> <mailto:[email protected]>[email protected] >> [mailto:[email protected]] On >> Behalf Of <mailto:[email protected]>[email protected] >> Sent: Tuesday, September 08, 2009 10:16 AM >> To: <mailto:[email protected]>[email protected] >> Subject: [Repeater-Builder] P25 Problem >> >> >> >> >> >> Trying to help a friend with a problem: >> >> >> >> Working on a P25 High Band trunking system. >> >> >> >> Infrastructure is MA/COM. >> >> >> >> Subscriber units are a mix; EF Johnson, Motorola, and MA/COM. >> >> >> >> Problem: >> >> >> >> When an emergency is cleared from the console >> >> >> >> only the MA/COM radios are automatically cleared. >> >> >> >> The Motorola and Johnson radios have to be cleared individually at the radio. >> >> >> >> Anybody dealt with this type of problem? >> >> >> >> Thanks, >> >> >> >> Will >> >> >> >> >> > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > > > ------------------------------------------------------------------------ > > > Internal Virus Database is out of date. > Checked by AVG - www.avg.com > Version: 8.5.387 / Virus Database: 270.13.38/2274 - Release Date: 07/31/09 > 05:58:00 > ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) <*> To change settings via email: mailto:[email protected] mailto:[email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
