I am getting MCPD now. About 20 minutes after i posted that, MCPD picked back up again as well. Has anyone been able to get the TG's for the Sheriff Dept ???? On the P16 system it made for some ah interesting listing to at 3 and 4 am in the morning when alone you might say.. nothing to do with any type of surveillance at those hours....
Montgomery County PSSM Program update
- Thread starter maus92
- Start date
The system also has 851.3375 as a frequency... I submitted that and it has been worked.
The database now reflects that
The database now reflects that
Maybe some users (or a user) with non-phase II radios affiliated to those TG's causing them to fallback to Phase I only?
Maybe, but the county has had APX's for a long time now.
Hearing some bad distortion again from my location out here in the boonies on 7V2. Alert tones badly distorted, audio seems degraded, hum in the background and possible signal degradation. Can anyone confirm who's local?
I’m local and can confirm that it’s distorted.
Last night before I went to bed it was slightly distorted but I woke up and it was worse.
Last night before I went to bed it was slightly distorted but I woke up and it was worse.
I am getting TG6495 as full time encrypted comes. Has anyone found the TG's that the Sheriff Dept were using on the old system?
I have found that when using my KNG2 radio and if I enter 0 in the talk group ID (hex) it will allow the WHOLE SYSTEM TG Thru and display the TG that are talking as well. I think this is a lot simpler then using a SDR Dongle.
Let me ask what might be a dum question.
why do these frequencies show up under channel ID after i tune my KNG radio to montgomery and the MD 1st system?
12.5 tx offset -39.000 12.5spacing 935.01250 FDMA
TDMA
why do these frequencies show up under channel ID after i tune my KNG radio to montgomery and the MD 1st system?
12.5 tx offset -39.000 12.5spacing 935.01250 FDMA
TDMA
7A2 and 7V2 (154.160) no voice, just tones and then silence. 7A1 and 7V1 seems to be working.
EDIT: back working now as of 10:23PM
EDIT: back working now as of 10:23PM
Last edited:
7V2 seems okay now as of 23:32EDT. Just checked my feed and am hearing tones and vocals. I swear their radio techs are following this thread to alert them of failures. Just saying...
Can someone explain exactly what alerts fire stations and volunteers besides the main CAD system? 7V2 transmits tones, which should in theory alert pagers, trigger claxons in the stations, etc...(I get there are data systems in place, like CAD, etc) but many times, the dispatcher talks over the tones, or there are tones and no voice dispatch for several minutes (don't the pagers time out?). Doesn't that prevent pagers from being alerted?? I am guessing there are other ways like data/info paging to smartphones, etc in place? The 7V2 channel seems like it is the last in line to actually alert anyone in an efficient manner. I'm assuming, it's just a backup now. What am I missing? I think I'm just living in the 90's.
Yeah, it started working about 5 minutes after I posted that. I double-checked with the online feed to make sure it wasn't just me before I posted something about it
The CAD system alerts the stations; the tones alert the personnel with pagers. The CAD can be tied into other software that can alert smartphones. I'm not sure of the sequence in MontCo, but in AACo, the CAD is sent out over data connections (aka not 800 RF) to stations and field units, then a brief voice announce if a serious call / box that does not include assigned units, then the full dispatch with tones sent out over VHF and then simulcast VHF and 800 voice announcing the call with assigned units. Sometimes the dispatcher leaves the simulselected VHF up for a few moment after the full dispatch goes out (probably accidentally.) When this happens, you typically only hear the dispatcher side of the convo.
I'm just confused how the system allows the dispatcher to talk over the tones on 7V2. If a tone gets blocked by a someone talking over it, it's not going to alert the pagers configured for that tone pair, correct? Isn't that a problem?
They should not be talking over the tones - not sure if the dispatcher hears the tones, or gets cued when the tones are finished. Back in the VHF days, the county's first iteration of CAD had problems spitting out tones in a timely manner. I think they were using a DEC PDP-11 computer. The QC2 and Intrac signal timing was a mess.
The system is designed (as all should be) to prioritize voice over ANY data, even tones. Regardless, if will not be much of an issue come May 1st.
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