Does anyone have any indepth info on the Pima County Multinet System? I know that this system changed over from an EDACS system to a Mulit-Net system - but I'm hoping that someone has some good in-depth details regarding this system.
Pima County Multinet
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Pima County
The system they use now uses EF Johnson radios, I have noticed they have increased the number of freq they use and more of the county agencies are on the system. If it helps the modle number for the handheld units 242-8160.
I am curios if any one has had any sucess tracking using any scanner. I have tried asking County radio shop but they laughed.
The system they use now uses EF Johnson radios, I have noticed they have increased the number of freq they use and more of the county agencies are on the system. If it helps the modle number for the handheld units 242-8160.
I am curios if any one has had any sucess tracking using any scanner. I have tried asking County radio shop but they laughed.
There is no scanner, that I am aware of, that tracks the Pima County system which has frustrated me to no end. I've even tried to suffer through listening to it conventionally. The city of Yuma also uses this type of EF Johnson multinet. I havn't encountered it anywhere else, thank goodness.
Mark
Mark
pima county system
If this helps I noticed that the repeaters do not have all of the freqs used by the system. So I programed banks on scanner for each repeater, usaly an incedent does not change repeaters. I also have two scanners operating while monitoring. I leave delay turned off and lock out any channels with data transmissions. I may miss some calls but for the most part anything of real intrest I have been able to keep up with. This system is a busy system with Sheriff department, Animal Control, Corrections, Building Security, Juvenile Corrections, Enviormental Quality using it.
If this helps I noticed that the repeaters do not have all of the freqs used by the system. So I programed banks on scanner for each repeater, usaly an incedent does not change repeaters. I also have two scanners operating while monitoring. I leave delay turned off and lock out any channels with data transmissions. I may miss some calls but for the most part anything of real intrest I have been able to keep up with. This system is a busy system with Sheriff department, Animal Control, Corrections, Building Security, Juvenile Corrections, Enviormental Quality using it.
Agent86
Member
I just received a BC796D. Will it scan the PCSD LTR system 
Agent 86, the answer is no. There isn't a scanner which will properly follow PCSD's system. I've been dealing with this problem for years. You can attempt to scan them as you would any conventional system but trust me, it's frustrating.
Agent86 said:I just received a BC796D. Will it scan the PCSD LTR system
No. Because PCSO does not have an LTR system. While most EF Johnson systems are LTR, Pima County's particular variety is MultiNet, which is not the same simple LTR that scanners are capable of tracking.
Dan
Hello,
I looked at the talkgroup information for this system and it indicates there is an area bit which Multinet does not have.
I have seen postings that say "If there is a dead carrier on one of the frequencies it is Multinet". This is not entirely true. LTR-Net also uses a "status" channel like Multinet but it is compatible with regular LTR. So either the talkgroup information is incorrect or this is not really a Multinet system.
A group is working on a trunker like program to trunktrack a multinet system. I have sucessfully done it with a local Multinet system. This will require a computer, two scanners, and alittle hardware to do.
If this is really a multisite Mlutinet system then I would be really interested in data dumps from the system. The understanding of Multinet protocol is very basic and I would like to figure out where the site ID is specified.
73 Eric
I looked at the talkgroup information for this system and it indicates there is an area bit which Multinet does not have.
I have seen postings that say "If there is a dead carrier on one of the frequencies it is Multinet". This is not entirely true. LTR-Net also uses a "status" channel like Multinet but it is compatible with regular LTR. So either the talkgroup information is incorrect or this is not really a Multinet system.
A group is working on a trunker like program to trunktrack a multinet system. I have sucessfully done it with a local Multinet system. This will require a computer, two scanners, and alittle hardware to do.
If this is really a multisite Mlutinet system then I would be really interested in data dumps from the system. The understanding of Multinet protocol is very basic and I would like to figure out where the site ID is specified.
73 Eric
EricCottrell said:
This sounds like very good news for those who live in areas that use a MultiNet system like McLean County, Ill., and I believe Chester County, Penn. use these systems. Thankfully, this format is not more widespread and the former plans on joining the Illinois State Police Starcom 21 TRS when it's built. However, an LTR system is much simpler and easier to maintain. The phasing problems between towers was the primary reason that the McLean County system has been such a failure.
73's
Ron
EricCottrell said:
That talkgroup information came from someone using a 785D set in regular LTR mode. He says that a small percentage of radio traffic in the Tucson area popped up on LTR talkgroups, but tracking it was not really happening. It appears to me that the talkgroups are just misreported. Sort of like reporting a string of Motorola Type II talkgroups when monitoring a Type I-only system, simply because you set your scanner to Type II so it stopped on all kinds of random stuff.
That's my guess.
I tried using my 296D in Tucson with LTR settings and got a few random talkgroup IDs to pop up for split seconds at a time, but was never able to actually follow any conversations.
Also, the press releases for this system several years back declared it would be a MultiNet system.
But if someone can get TrunkTracking to work properly on it, by all means let us know!
Dan
EricCottrell said:
Also consider:
From the PCSO website at
http://www.pimasheriff.org/innov.html
"In 1999, updated our communication capabilities by installing an EF Johnson Multi-Net II Communications System. The 800-megahertz, trunked system enhances the telephone interconnect capabilities for the new millennium. The previously used EDACS system purchased in 1989 supported approximately 1000 users including the County Attorney's Office, Pima County Parks Service, and Animal Control, as well as other federal and local law enforcement agencies. The new 2.5 million dollar system increased the user base to approximately 1400. In addition to all of the previously supported users, accommodations were made for Pima County Public Works and the Department of Transportation."
DanRollman said:
If I was the communications director, I would have kept the EDACS and not the MultiNet system. Comparing the two, the former has a better track record and is more widely used. Furthermore, I really find an EDACS system easy to scan once you get the logical channel sequence setup properly. I wonder if the key reason they chose the MultiNet system because it wasn't an available on trunktracker scanners?
73's
Ron
Pima County paid well over 2 million to add just 400 talk groups? Hmm.
How many talk groups can be added to an EDACS system?
73-Mark
How many talk groups can be added to an EDACS system?
73-Mark
Hello,
It appears 400 users were added.
Multinet has a limit of about 8,000 users.
It appears that Multinet follows the same Home Repeater-Group as regular LTR so each home repeater can have about 225
groups. The new version of LTRDump I am about to release now displays home repeater information. It appears that two is the maximum number of home channels on this system given that the status channel is not used as a home channel (bad practice) and all groups have county-wide coverage. This assumes that the list is correct.
I understand that there is a maximum of 30 repeaters at a site. I do not know if the same home repeater number has to be used for the same frequency at different sites. For example 856.1000 is always Repeater 1. This would mean that the maximum number of frequencies is 30 and this system is close to the limit.
The more I look at this system the better it looks as a candidate for someone to use the version of LTRDump/LTRTrunk I am about to release to scope out the system.
Maybe I should go there for February vacation 8->.
73 Eric
It appears 400 users were added.
Multinet has a limit of about 8,000 users.
It appears that Multinet follows the same Home Repeater-Group as regular LTR so each home repeater can have about 225
groups. The new version of LTRDump I am about to release now displays home repeater information. It appears that two is the maximum number of home channels on this system given that the status channel is not used as a home channel (bad practice) and all groups have county-wide coverage. This assumes that the list is correct.
I understand that there is a maximum of 30 repeaters at a site. I do not know if the same home repeater number has to be used for the same frequency at different sites. For example 856.1000 is always Repeater 1. This would mean that the maximum number of frequencies is 30 and this system is close to the limit.
The more I look at this system the better it looks as a candidate for someone to use the version of LTRDump/LTRTrunk I am about to release to scope out the system.
Maybe I should go there for February vacation 8->.
73 Eric
Hello,
I would appeciate it if someone could monitor this system using the ltrdump program in the thread listed below. Email me the ltrdump.txt file. I am sure blantonl would like the talkgroup and frequency information that ltrtrunk should gather submitted to the TRSDB. The more sites, the better.
http://www.trunkedradio.net/groups/showthread.php?s=&threadid=7378
73 Eric
I would appeciate it if someone could monitor this system using the ltrdump program in the thread listed below. Email me the ltrdump.txt file. I am sure blantonl would like the talkgroup and frequency information that ltrtrunk should gather submitted to the TRSDB. The more sites, the better.
http://www.trunkedradio.net/groups/showthread.php?s=&threadid=7378
73 Eric
STiMULi
Member
Dan...
Is there a radio I could purchase from ebay and have it programmed that would work for monitoring PCSO without being part of the net and having to access all the secret little codes that allow these radios to work?
Scott S.
Is there a radio I could purchase from ebay and have it programmed that would work for monitoring PCSO without being part of the net and having to access all the secret little codes that allow these radios to work?
Scott S.
STiMULi said:
MultiNet monitoring is only available via a computer application similar to trunker, called LTrack (or something like that). No receiver, standing alone, is capable of monitoring MultiNet (PCSO). Need the receiver, computer, and free software available on this website.
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