Norfolk Southern 900 MHz Usage Question

kruser

Active Member
Premium Subscriber
Joined
Nov 25, 2007
Messages
4,445
Location
West St Louis Cnty, MO
Looking at the FCC site for call sign KNNT791, it looks like NS is using this license for "Automatic Equipment Identification (AEI)".

ATCS is very common in the 900 MHz band but usually does not operate in the 902 to 928 ISM band that this license is for.
 

alabamarailfan

Member
Premium Subscriber
Joined
Jan 6, 2009
Messages
193
@kruser is correct. The ATCS frequency pairs are 896-897 MHz and 935-936 MHz. Also, I believe the ATCS (radio code line) licenses are part of a ribbon license that the AAR requested and is not usually found for specific railroads any longer. However, AEI does still use licenses per railroads and is much lower power.
 

nd5y

Member
Joined
Dec 19, 2002
Messages
9,548
Location
Wichita Falls, TX
Look at the radio service code. Radiolocation LN 902-928 MHz Location Narrowband (non-multilateration). That is usually for stuff like toll tag readers and RFID readers. I don't know what railroad equipment that would be.
 

kruser

Active Member
Premium Subscriber
Joined
Nov 25, 2007
Messages
4,445
Location
West St Louis Cnty, MO
@kruser is correct. The ATCS frequency pairs are 896-897 MHz and 935-936 MHz. Also, I believe the ATCS (radio code line) licenses are part of a ribbon license that the AAR requested and is not usually found for specific railroads any longer. However, AEI does still use licenses per railroads and is much lower power.
If I'm not mistaken, there's a plan in place to relocate some of the ATCS 900 MHz frequencies for RCL to a new grouping of frequencies. Something to do with one of the 5G cellular bands I think. I think the change is to group the users together frequency wise and establish a small guard band between services (users). I don't know if this was approved by the FCC yet but the last I read, all the Class 1's and AAR were on board with the change as well as the cell carriers. I think several of the radios were also capable of the frequency changes making the cost to make the change minimal.
 

JoshuaHufford

Member
Feed Provider
Joined
May 27, 2018
Messages
653
Location
Jefferson City, Mo
If I'm not mistaken, there's a plan in place to relocate some of the ATCS 900 MHz frequencies for RCL to a new grouping of frequencies. Something to do with one of the 5G cellular bands I think. I think the change is to group the users together frequency wise and establish a small guard band between services (users). I don't know if this was approved by the FCC yet but the last I read, all the Class 1's and AAR were on board with the change as well as the cell carriers. I think several of the radios were also capable of the frequency changes making the cost to make the change minimal.
Do you know what the new frequencies in use would be?
 

kruser

Active Member
Premium Subscriber
Joined
Nov 25, 2007
Messages
4,445
Location
West St Louis Cnty, MO
Do you know what the new frequencies in use would be?
I'm not certain anything has been finalized but all the info is in the linked PDF at the FCC site.

Hopefully that link works!

It also does not contain any road specific frequencies yet and some frequencies are okay as they are. I didn't read into it a lot but I think the SD9 radios would still work if they do make the change.

This link should take you directly to the FCC page that has the PDF link about this.
 
Last edited:

iceman977th

Member
Feed Provider
Joined
Dec 25, 2009
Messages
331
Location
Catlettsburg, KY
I'm not certain anything has been finalized but all the info is in the linked PDF at the FCC site.

Hopefully that link works!

It also does not contain any road specific frequencies yet and some frequencies are okay as they are. I didn't read into it a lot but I think the SD9 radios would still work if they do make the change.

This link should take you directly to the FCC page that has the PDF link about this.
I glanced through the FCC Fact sheet on the 900MHz transition. Page 44 mentions cancellation of the current nationwide license by Anterix, who is the holder of the ATCS channel license, and in turn, AAR will be licensed for use of a paired wideband channels between 896-896.125 and 935-935.125. Whether this means the ATCS channels will transition to that split, which is just below the current ATCS channels, or if this means they will change technologies, I'm not sure yet.

Mike
 
Top