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LTR Trunking General discussion of LTR, LTR Multi-Net, and Passport Systems

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Old 04-08-2006, 2:26 PM
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Question Help with PassPort system?

My local American Medical Response operation has just moved to a PassPort system, using Motorola HT-1250LS radios. My understanding is that PassPort is not supported by any current scanners.

How do I monitor this system and what freqency is it likely to be using?

Thanks!
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Old 04-08-2006, 3:10 PM
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the only ways are
- get a radio programmed by the company
- listen in conventional mode (and listen to the annoying keyups)
- use LTRTrunk software with a computer and two scanners. The only way to trunktrack the Passport systems for now.

as for the frequencies, being passport does not limit it to any band. Here in CT, UHF is the primary band for regular LTR, LTR-NET & Passport. We do not have the volume of systems that you must have to deal with in CA though. I would look toward commercial systems and start there. One of the newer scanners w/ close call technology or a freq counter is what you would need to find one of the freqs. That would give you a place to start a freq search on the FCC website.

chris
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Old 04-08-2006, 8:19 PM
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Hey David, I just replied to this in the bayscan yahoo group also. I was bandscanning around and found "AMR LifeComm" for Stanislaus County on:

452.275 - This appears to be their home repeater (if home repeaters exist in Passport, I'm really not familiar enough with it yet). It comes in strong in my home in Marin County, so it must be in a high spot - like Mt Diablo.

Enjoy! I'd really like to figure out how to build a filtered data-slicer eventually to start mapping their system out.

-Inigo
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Old 04-08-2006, 10:53 PM
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Hello,

Home repeaters do exist in Passport.

The advantage of Passport is direct frequency assignment so if you get LTRDump running on 452.275, the log files will give LCNs that map to frequencies. This is like a Motorola UHF system except there are fixed frequency mappings.

http://www.fisherwireless.com/coverage.htm
Fisher Wireless has the Teamtalk network, a massive Passport system for CA that goes into Las Vegas and Arizona. It looks like it is multiple systems linked together into a network (up to 8 systems can be linked). They have a site on Mt. Diablo that is using 452.275. You may hear keyups every one to four seconds on these other frequencies.

WPMU872 Fisher Wireless
451.4750 452.2750 452.3250 452.3500 452.7250 452.8000 452.8750 462.4250 463.2000 463.4250

73 Eric
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Old 04-08-2006, 11:46 PM
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Thank you Eric! Direct frequency assignment sounds like it would greatly simplify the process of figuring out an LTR system. Since I am without a filtered dataslicer at the moment, I'm using my pretty new Pro-97 (my first LTR scanner) to find "TO" channels on some local LTR standard systems by waiting for enough system activity for multiple trunk outs off the home repeater channel, noting the number and then finding them simply by band-scanning. I've had a lot of success because I can be sure that freq is part of the system, but it's enormously time consuming. (Band-scanning is often necessitated because the two most active systems in my area are spread across multiple licenses, which all indicate different sites... so the FCC data is wrong and pretty much useless.) I'm encouraged LTRdump/LTRtrunk will help not only with Standard, but Passport and Multi-NET too.

-Inigo
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Old 05-01-2006, 1:24 PM
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Post American Medical Response Lifecomm Dispatch Center

Here are the frequencies that are licensed to American Medical Response Lifecomm for use on our Motorola Passport LTR Trunking System. However there are some other frequencies that I found which are not on this list by searching the FCC website for licensed frequencies. The frequencies after the list are the ones that I found to be the most active on our system after scanning all of the frequencies for about an hour. You may hear other traffic on these frequencies but that's because you are listening to them in conventional mode, not Passport LTR Trunking.

Frequencies Used
AMR – San Joaquin Frequencies

451.1500 452.3000 462.1000
451.1750 452.3250 462.1500
451.2250 452.3625 462.2000
451.2750 452.4000 462.2250
451.2875 452.4500 462.2750
451.3000 452.5000 462.3000
451.3250 452.6375 462.3500
451.3500 452.6500 462.3750
451.4000 452.6750 462.4000
451.4250 452.7000 462.4750
451.4750 452.7250 463.2250
451.5500 452.8500 463.3750
451.5750 452.8875 463.4500
451.6250 452.9750 463.5500
451.6750 453.0000 463.6750
451.7000 461.0250 463.7750
451.7500 461.0750 463.9000
451.8375 461.1000 464.0000
452.0250 461.1750 464.0500
452.0750 461.3000 464.1250
452.0875 461.3250 464.1500
452.1500 461.5875 464.3500
452.1750 461.6250 464.4500
452.2000 461.6500 464.6000
452.2250 461.7000 464.6500
452.2375 461.9000 464.7250
452.2750 461.9250 464.9000
155.2200 = (AVL & Remote Vehicle Monitoring)
155.2050 = (Shared Fire Service Back-Up Frequency)

Most active frequencies:
451.7000
451.9625
452.0125
452.2375
461.1000
462.2000
463.6750
463.7500
463.8250


Eddie Ragasa EMT, EMD, EFD
San Joaquin County Control 1 System Dispatcher
American Medical Response, Lifecomm Dispatch

Last edited by medic2442; 05-01-2006 at 4:03 PM..
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Old 05-01-2006, 3:34 PM
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Hello,

You can ignore all the 456, 457, 458, 466, 467, 468, and 469 MHz frequencies because they are repeater inputs. Likely the list of frequencies represent all the sites AMR can use and your local area site will only use a subset. I think the limit is 30 frequencies per site for Passport.

73 Eric
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Old 05-05-2006, 12:14 AM
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And they are licensed to Fisher Wireless and/or Lagorio, not AMR. AMR rents service from Fisher.

You may have Motorola radios, but the system protocol is "Passport" which is a product of Trident Micro, not Motorola. See www.tridentms.com .
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