Unknown Digital Mode. Tetra?

[ranger2004]

I have noticed for some time on a SDR there are several 20-25khz digital channels.
Between 852-859mhz.

BYU DMR ,UCA, etc.

I cant find anything that looks like this other than TETRA.
If that is true how has no one mentioned it??

Let me know what you think of the attached.
There are maybe 6-10 channels just like it.

Brett

 

[RaleighGuy]

I have noticed for some time on a SDR there are several 20-25khz digital channels.
Between 852-859mhz.

BYU DMR ,UCA, etc.

I cant find anything that looks like this other than TETRA.
If that is true how has no one mentioned it??

Let me know what you think of the attached.
There are maybe 6-10 channels just like it.

Brett

Have you attempted to search the FCC or RR database for users and emission designators on the frequencies?

 

[ranger2004]

Have you attempted to search the FCC or RR database for users and emission designators on the frequencies?

Yes, I forgot to mention that.
Nothing found.

 

[kf8yk]

Looks like iDEN, probably the Utah Transit Authority.

From the 2021 UTA Board of Trustees meeting notes:

"Motorola Integrated Digital Enhanced Network (IDEN) support: This is a sole source procurement to establish a 5-year contract with Motorola to continue support of our Integrated Digital Enhanced Network (IDEN). The IDEN system was originally procured through a competitive bid in 2011 and it is the Radio system UTA has been using in our entire fleet since then. The Motorola IDEN system uses cellular technology over an IP based network on a scaled down version of Nextel’s push to talk platform. This allows for quick, reliable contact with our operators throughout our service territory. This sole source contract will continue to provide support to our current system while UTA explores alternatives to replace it. Funding for this support is included in the IT 2021 operating expense budget."

 

[ranger2004]

Looks like iDEN, probably the Utah Transit Authority.

From the 2021 UTA Board of Trustees meeting notes:

"Motorola Integrated Digital Enhanced Network (IDEN) support: This is a sole source procurement to establish a 5-year contract with Motorola to continue support of our Integrated Digital Enhanced Network (IDEN). The IDEN system was originally procured through a competitive bid in 2011 and it is the Radio system UTA has been using in our entire fleet since then. The Motorola IDEN system uses cellular technology over an IP based network on a scaled down version of Nextel’s push to talk platform. This allows for quick, reliable contact with our operators throughout our service territory. This sole source contract will continue to provide support to our current system while UTA explores alternatives to replace it. Funding for this support is included in the IT 2021 operating expense budget."

Nice. Thanks for the info.
I had no idea iDen was wide.

UTA in now using MPT1327 I believe.

I will be looking into it more.

Again thanks
Brett

 

[enosjones]

If you have dsdplus check to see if it can decode it

 

[ranger2004]

If you have dsdplus check to see if it can decode it

Its iDEN not NXDN.

 

[kd7rto]

Nice. Thanks for the info.
I had no idea iDen was wide.

UTA in now using MPT1327 I believe.

I will be looking into it more.

Again thanks
Brett

PacifiCorp/Rocky Mountain Power uses MPT1327 in the VHF-Hi band. Probably for compatibility, because that's what the power utilities in other western states are using. I'm not aware of any other current MPT1327 systems in Utah. UTA was running 900 MHz MPT1327, before they built out iDEN, but that was decommissioned a long time ago.

I have no idea what was going through the minds of the decision makers at UTA, when they chose to go with an obsolete protocol that had been used by Nextel, back when Nextel still existed.