New NYCTA Phase 1 System?

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Jimbo695

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Hello, folks. Any information on the new Transit Authority Phase 1 system that I just saw in Glenn Mitchell's weekly report? There already is a recently implemented 700 MHz Phase II system for NYC so I'm wondering why this? Thanks.
 

Darkstar350

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From what i gather - the system will be either P25 or Tetra because the company that they contracted for the new system(s?) apparently deals with both P25 as well as Tetra equipment
It looks like it will most likely be P25 due to interference concerns in the tri state area with Tetra being too wide bandwidth but they may still be testing that ...
 
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DaveNF2G

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If they're calling it "Phase I" then it will be P25 as there is no such version of TETRA.
 

Darkstar350

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It looks like it will *most likely* be P25 - whether phase 1 or phase 2 is the big question
What i didnt realize was is that New Jersey Transit has now built their 800mhz Tetra system out and someone has actually mapped out some talkgroups for that system https://www.radioreference.com/apps/db/?sid=7725
I didnt think there was even a way to decode Tetra unless perhaps using actual Tetra radios

http://wireless2.fcc.gov/UlsApp/ApplicationSearch/applAdmin.jsp?applID=10433813#

So that being the case NYCTA and NJT both using Tetra in such close proximity would definitely have some interference issues i was just pointing out that the radio company NYCTA has contracted was pushing for Tetra however the FCC may have since ruled against it
It is kind of pointless to use Tetra in the states as its more of a overseas thing - if they want a digital system they may as well just use DMR or P25 - unless they just want to "be different"...
 
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GTR8000

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The NYCTA is building out a TETRA pilot system on 700 MHz. It is expected that if the pilot system is successful, the entire buildout will be TETRA incorporating both 700 and 800 MHz frequencies.

The reference to "Phase 1" and "Phase 2" are simply the design and rollout phases of the system itself; not a reference to P25.

The proximity of the NYCTA and NJT has no bearing on interference issues simply because they are both TETRA systems. Any interference issues would be on co-channels or adjacent channels, not the proximity of two separate systems.

Also, when looking at their licenses, remember to pay attention to conventional SG vs trunking SY, as they have both.

Oh and by the way, the "point of using TETRA" is that the subscriber equipment is much cheaper than P25.
 

JETBLUE1424

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Does anyone have the 700 meg freq and also does it look favorable for P25 for the MTA buses
 

Darkstar350

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Oh and by the way, the "point of using TETRA" is that the subscriber equipment is much cheaper than P25.
I didnt realize Tetra would be cheaper then P25 but i can see that as P25 can be quite expensive especially without some type of grant which im not sure if the MTA/NYCTA can qualify for a grant as they arent exactly a public safety agency
My point was just that in if theres really no difference with Tetra and other digital modes then why not just use the others but if it is indeed more cost effective then by all means go Tetra
As far as Tetra being cheaper then DMR or NXDN im not sure but with Tetra being generally foreign and US dollars going longer other places it all makes sense ;)

Does anyone have the 700 meg freq and also does it look favorable for P25 for the MTA buses
http://wireless2.fcc.gov/UlsApp/UlsSearch/license.jsp?licKey=3836318
http://wireless2.fcc.gov/UlsApp/UlsSearch/license.jsp?licKey=3943820

They probobly will add some freqs given time and they also have a few conventional 700mhz licenses
As far as being favorable for P25 its really up in the air at this point as i stated the company NYCTA has contracted to build out the system deals with both P25 and Tetra equipment but they are testing things out at the moment to figure out what will be the most efficient,etc

www.teltronic.es/en - This is the company that will build out the NYCTA system

Heres some info about the testing for the new system and whatnot - https://wireless2.fcc.gov/UlsEntry/...tachmentKey=20171933&attachmentInd=applAttach
 
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DaveNF2G

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The reference to "Phase 1" and "Phase 2" are simply the design and rollout phases of the system itself; not a reference to P25.
I should have thought of that possibility. We had the same nomenclature problem with the Albany County P25 system, where "Phase 2" refers to the "County Cell" and not the type of trunking.
 

Jimbo695

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Something else to think about. Several of the approved frequencies seem to be outside the standard 791-797 MHz "700 MHz" band scope. When I tried to load them as conventional into my WS 1080 manually. just to be able to track any activity, the EZ Scan program rejected those over 799.
 

GTR8000

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The 700 MHz Public Safety narrowband (voice) spectrum is 769-775 MHz for repeater outputs and simplex; 799-805 Mhz are the repeater inputs.

GRE/Whistler scanners are unable to receive those input frequencies.
 

KC2zZe

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I didnt realize Tetra would be cheaper then P25 but i can see that as P25 can be quite expensive especially without some type of grant which im not sure if the MTA/NYCTA can qualify for a grant as they arent exactly a public safety agency
Just because the Metropolitan Transportation Authority isn't a public safety agency doesn't mean it isn't eligible for grants. There are numerous national government agencies that give boatloads of taxpayer dollars away to governmental and non-governmental / business enterprises all fiscal year long, e.g.: https://www.transit.dot.gov/about-fta
 

Darkstar350

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Just because the Metropolitan Transportation Authority isn't a public safety agency doesn't mean it isn't eligible for grants. There are numerous national government agencies that give boatloads of taxpayer dollars away to governmental and non-governmental / business enterprises all fiscal year long, e.g.: https://www.transit.dot.gov/about-fta
Makes sense i guess, thanks

Ive been hearing more and more noise on 700mhz so we will see what happens ;)
 
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