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  #881 (permalink)  
Old 03-01-2014, 5:19 AM
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Thought I heard a MEMA guy calling/talking to a unit that in the past was affiliated with Worcester or Wicomico.... makes sense with your observation - that radio ID appears to belong to Worcester County.
Sounds like it was MEMA talking with Worcester 1302 - MEMA user was in Dundalk and I'll assume the Worcester unit was in - let's say Worcester County -- that's cool.

There also appeared to be some coverage/range testing in/around (possibly based on the 265xxxx radio ID) Wicomico County on Thursday. This was heard on the Baltimore site.
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  #882 (permalink)  
Old 03-01-2014, 11:33 AM
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Originally Posted by troymail View Post
That means the AA site is connected to the Queen Anne's site (and, according to Pro96Com) also 101/Baltimore and 106/Tunnels.

Sounds like they've made the change on the AA site from 105 to 309 to match the programming on the Queen Anne's site (774.54375) - but that's just a guess. Someone will have to verify the QA side and then update RR.
I guess I'm not being clear. What does "connected" mean exactly? Does it mean the the AA tower is simply aware of its neighboring towers, or is voice and/or data reception from the "connected" towers being routed to the AA tower, and re-broadcast?
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  #883 (permalink)  
Old 03-02-2014, 6:37 PM
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I saw Queen Anne's reporting itself as 309 last fall but "not connected". AA was still reporting Queen Anne's as 105. Last time I ran Pro96Com on AA, it was still showing 309 not connected. I was on the shore last weekend but didn't take the time to see what Queen Anne was reporting recently. Not really sure what's happening... I do think there's yet another site not yet documented in the St. Michaels area that may now be active also....

Another road trip may be in order but I'm head north this weekend so it'll have to wait (for me anyway).
I was feeling a bit geeky today, so I installed Pro96Com on my MS Surface Pro, and took a short ride across the bay. Sitting adjacent Bay Bridge Airport, I was able to lock on Queen Anne's site, which reports itself as Tower ID (site) T0309. From there, I saw the following sites as "Connected, Current:"

Site ID 102 (T0102) [Anne Arundel]
Site ID 107 (T0107) [Kent]
Site ID 306 (T0306) [Talbot]
Site ID 308 (T0308) [Denton]

All we verified by control channel.

I observed only a few active TGs: 7328 (MSP Centreville) 7334 (UNID and ENC - likely MSP) 12811 (KCSO) 7106 (MdTAPD Bay Bridge) I'll check to see if Pro96Com logged anything else for the short time I sat there ~20 mins.

I suppose I should submit these tower finds to the DB - it looks like they will need to redefine the Tower / Site ID schema somewhat.
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  #884 (permalink)  
Old 03-02-2014, 8:18 PM
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Originally Posted by maus92 View Post
I was feeling a bit geeky today, so I installed Pro96Com on my MS Surface Pro, and took a short ride across the bay. Sitting adjacent Bay Bridge Airport, I was able to lock on Queen Anne's site, which reports itself as Tower ID (site) T0309. From there, I saw the following sites as "Connected, Current:"

Site ID 102 (T0102) [Anne Arundel]
Site ID 107 (T0107) [Kent]
Site ID 306 (T0306) [Talbot]
Site ID 308 (T0308) [Denton]

All we verified by control channel.

I observed only a few active TGs: 7328 (MSP Centreville) 7334 (UNID and ENC - likely MSP) 12811 (KCSO) 7106 (MdTAPD Bay Bridge) I'll check to see if Pro96Com logged anything else for the short time I sat there ~20 mins.

I suppose I should submit these tower finds to the DB - it looks like they will need to redefine the Tower / Site ID schema somewhat.
Excellent! Go ahead and submit the changes/updates.
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  #885 (permalink)  
Old 03-03-2014, 9:51 AM
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I'm looking for indications of radio ID or other matches for TGID 7334 to Centreville MSP (7328) . Pro96Com is showing a radio ID of "0" each time so this seems like some type of patch from another system.
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  #886 (permalink)  
Old 03-03-2014, 11:25 AM
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Based on the fleet map, 7334 should be Centerville Tac and 7340 Centerville CID
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  #887 (permalink)  
Old 03-04-2014, 6:20 PM
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Another MSP talkgroup?
Talkgroup: 7467,
3 Radio IDs in 21253xx, 21252xx range
ENC
Anne Arundel Site
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  #888 (permalink)  
Old 03-06-2014, 12:20 AM
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What is the purpose of ASR (ASTRO Site Repeater?) sites? For example, there is one at Greenbury Point in Annapolis, based on FCC & CAPRAD data. It has its own license for two frequencies, and doesn't seem to be part of the Anne Arundel "cell."
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  #889 (permalink)  
Old 03-06-2014, 3:23 AM
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Do correct me if I'm wrong, but I believe that's just Motospeak for a trunked system SITE (in contrast to a tower) when applied to a multicast system.
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  #890 (permalink)  
Old 03-06-2014, 3:55 AM
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Quote:
Originally Posted by dpcain View Post
Do correct me if I'm wrong, but I believe that's just Motospeak for a trunked system SITE (in contrast to a tower) when applied to a multicast system.
Don't think so... There are several sites listed - Greenbury Point, Tracey's Landing, Emmistburg, etc. that appear to be "stand alone" sites - using different frequencies. I've been thinking these are "failover" sites -- best I can tell, none of the frequencies assigned to these licences are active.
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  #891 (permalink)  
Old 03-06-2014, 5:30 AM
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Default Maryland FIRST 700mhz TRS

An ASR is simply a site that is not part of a Simucast Cell and while connected to a core, doesn't require the core or another prime site to perform trunking operations.


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  #892 (permalink)  
Old 03-06-2014, 6:49 AM
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Does anyone know of a publicly available generic design guide foe P25 (or Moto ASTRO 25) systems? It might help to explain how modern systems are designed and implemented - and help us to extrapolate how the FIRST system works. - I'm not sure what a "prime" site is, or a "core" for that matter.
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  #893 (permalink)  
Old 03-06-2014, 10:21 AM
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Originally Posted by troymail View Post
Don't think so... There are several sites listed - Greenbury Point, Tracey's Landing, Emmistburg, etc. that appear to be "stand alone" sites - using different frequencies. I've been thinking these are "failover" sites -- best I can tell, none of the frequencies assigned to these licences are active.
Ocean City is also an ASR according to CAPRAD, using different frequencies than the Worcester / Somerset cell... Also, the Taylors Island site also seems to be an ASR. CAPRAD ids it as "Smithville ASR" - they are using identical freqs. So the question then becomes should the RRDB use "Taylors Island" or Smithville as the site, and should there be a way to discriminate between an ASR and a "simulcast cell?"
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  #894 (permalink)  
Old 03-10-2014, 1:57 PM
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Default Maryland FIRST 700mhz TRS

7705 (possibly encrypted as I only heard a quick blurb) and 7706 were both active down here on the Worcester site today. More DPSCS I suspect based on the conversations and uid's being used (2149631 & 2149636) one of them asked the other where he was and the reply was 695.
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  #895 (permalink)  
Old 03-12-2014, 12:30 PM
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I rode around the Eastern Shore at the beginning of the week to help me get an understanding of how the system works. I confirmed that the Tilghman Island ASR site is currently not transmitting on any of its assigned freqs, and that the Taylors Island (Smithville Rd) ASR is up, and connected to the neighboring Dorchester simulcast cell (but to no others unlike the Federalsburg ASR.) I still need to get to OC to check out that area - maybe this weekend if the Terps don't make it to the ACC finals.... The Salisbury (Wicomico) simulcast cell has a different freq than what appears in the RRDB - likely a typo because the one I monitored w/ Pro96Com is also the one in CAPRAD, but not in RRDB - and submitted the info to the RRDB. I'm also in the process of finding the individual towers for the system - some are not listed in the FCC database - and experimenting with a Google Earth map of the system (a work in progress.)
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  #896 (permalink)  
Old 03-12-2014, 8:22 PM
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Default Maryland FIRST 700mhz TRS

Have you ever seen the google earth map of the VA STARS system? I posted a link to it several pages back. Something like that would be nice.
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  #897 (permalink)  
Old 03-13-2014, 8:08 AM
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Have you ever seen the google earth map of the VA STARS system? I posted a link to it several pages back. Something like that would be nice.
No, I haven't. I'll look for it, but I've noticed that many of the links in this forum topic are dead. I wonder if the linked documents were withdrawn for security reasons....
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Old 03-13-2014, 12:38 PM
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Maus92 I live in Salisbury and work in West Ocean City if you want any screenshots or logs of any of those 3 systems in Pro96Com let me know.
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  #899 (permalink)  
Old 03-13-2014, 6:27 PM
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Found it

https://maps.google.com/maps/ms?hl=e...96ebec8e62589d
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Old 03-14-2014, 7:21 PM
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Maus92 I live in Salisbury and work in West Ocean City if you want any screenshots or logs of any of those 3 systems in Pro96Com let me know.
I might Let me figure out what I need - and review what I've already captured.
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