Yellow Cab MotoTRBO

motohead10 · Oct 29, 2013

Hi there, I am listening to yellow cab on my Motorola XPR 6300 VHF I have the proper input and output and color code programmed into it, I can hear this dispatcher talking to the units perfectly but I never hear the units reply. This has also been the same since they were analog I was only able to hear the dispatcher and never the units no matter where I was at in Nashville or surrounding areas. Any info would be appreciated thanks.

W4EMS · Oct 30, 2013

If they are talking simplex you are probably too far away. If repeater then not sure.

motohead10 · Oct 30, 2013

I doubt they use any kind of microwave to reply on or they could be replying in simplex to dispatch on a different slot of tried slot 2 for voice and only have data on that channel I'm not sure what their doing

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jfhtm350 · Oct 30, 2013

Maybe the dispatcher sent the data along with the voice and there was no need to respond or they respond with data. What frequency are they on?

motohead10 · Oct 31, 2013

152.390 CC 7 voice slot 1 possibly data slot 2 I believe its Group 1 as well I don't recall changing groups to any different number I do sometimes hear the dispatcher call units over and over

firemedic2150 · Nov 1, 2013

From my experience taxi companies use split dispatching channels of some sort so that the cabs only hear the dispatcher, and the cabs can only talk to the dispatcher. This makes sure they cant hear each other so they don't jump calls, or talk to each other over the dispatcher. On LTR systems they will use split ID's, and on the low band ones they run duplex with no repeat, now I would bet on your Trbo they are doing something to split them up.

jfhtm350 · Nov 1, 2013

If that is the case, which sounds about right, then you will want to try to monitor 157.6500.

ULS License - Industrial/Business Pool, Conventional License - WQEN266 - YELLOW CAB METRO INC - Frequencies Summary

If that dont work then try one of the other yellow cab frequencies here:
ULS License - Industrial/Business Pool, Conventional License - KRM704 - YELLOW CAB COMPANY - Frequencies Summary

ULS License - Industrial/Business Pool, Conventional License - KF9521 - YELLOW CAB CO OF KNOXVILLE INC - Frequencies Summary

Im not sure if DSD will search on its own but you could run a search with your scanner around those frequencies until you hear a trbo noise then try to run it on DSD.

INDY72 · Nov 1, 2013

Most Taxi ops on VHF are split pairs. One Dispatch to cabs, one cabs to Dispatch. You will need to be near the cab to catch the replies to Dispatch. With DMR, they can add data such as AVL/Tracking/Mapping, or even a type of MDT device possibly. I have seen this with cabs on TRS, so it is possible.

And yeah, the lic is DMR and narrowband emissions codes.

motohead10 · Nov 1, 2013

Alright I'll give that a try and use the same DMR info in my radio to see if it works

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wema628 · Nov 4, 2013

Yes yellow is on what we call a taxi split. As others have stated its so the cabbies are not able to talk to each other and tie up the radio.

motohead10 · Nov 6, 2013

Alright, ive got dispatched figured out now I just need the frequency that the dispatcher is listening to the cabs on and how are the cabs radios set up exactly??

jfhtm350 · Nov 6, 2013

Did you try the ones I suggested above in post 7?
Head up to high ground and run a search if your not getting anything on those.

motohead10 · Nov 7, 2013

I ran the input on one and still only heard dispatch maybe I need to drive in downtown a little deeper

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wema628 · Nov 7, 2013

Let me get back in the shop next week and I'll get what you need

motohead10 · Nov 7, 2013

Alright appreciate it I never really fully understood those type of setups

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