London Bus change over to DMR

Scanning radio frequencies for the South East
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Metradio
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London Bus change over to DMR

Post by Metradio » 04 Nov 2018, 14:02

Testing of the London Bus DMR Network has started. From where I live I am receiving DMR in the clear from them on 139.66875MHz, this has been receivable for the last 3 weeks or so. Eventualy the system will be encrypted.
Their current MPT1327 and the new DMR Tier III system use the frequencies between 139.500 and 140.500MHz..

Mike

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Re: London Bus change over to DMR

Post by Wiggler » 07 Nov 2018, 15:32

Does this testing and upcoming change explain why I can now hear drivers on the 1to1 calls? In the past I could only hear the controller during 1to1 calls but on on group calls I could hear all drivers on the route. Now I can hear both sides all the time.

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Re: London Bus change over to DMR

Post by Metradio » 07 Nov 2018, 16:37

Yes I think it does...

Mike
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Re: London Bus change over to DMR

Post by radiosification » 07 Nov 2018, 22:11

I'm rather disappointed, I can't hear the new DMR system still
If you're interested in digital voice, check out my YouTube channel:
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Re: London Bus change over to DMR

Post by Metradio » 08 Nov 2018, 10:01

From Slough I can only pick up the one frequency, but a listener East of London has reported three live DMR frequencies from his location..
Might be worth a search of their band looking for the DMR beacon..

Mike
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Re: London Bus change over to DMR

Post by trainspotter375 » 21 Nov 2018, 12:44

radiosification wrote:
07 Nov 2018, 22:11
I'm rather disappointed, I can't hear the new DMR system still
indeed picking up two very active freqs from the old 2217 (8A9) site. have started to compile a list of the talkgroups but will be a waste of time once it goes encripted, radiosification if you pm me i can supply you the actual freqs and colourcodes/timeslots

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Re: London Bus change over to DMR

Post by Metradio » 21 Nov 2018, 14:40

Rereading the original TFL tendering requirements, was to have the "ability for encryption" and am not 100% they will implement the facility - only time will tell..

If you have a DMR receiver, the active frequencies can be found by searching between 139.500 and 140.500MHz, the active frequencies send out a constant beacon so are easily found..

Mike
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AOR AR-DV1 Digital Voice Receiver / eSPY on ARD V1.

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Re: London Bus change over to DMR

Post by Metradio » 30 Nov 2018, 18:35

Looks like they are in the midst of changing over today, many channels now DMR..

Mike
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Re: London Bus change over to DMR

Post by radtech » 01 Dec 2018, 15:24

Lots of bad feedback on my company intranet forum about the new system.

Problems reported from controllers that radios are picking up too much background noise and not enough voice. There's also comments about bad coverage in some areas (Orpington) and alert tones being far too loud.

It seems they've switched users over before testing thoroughly!
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Re: London Bus change over to DMR

Post by Metradio » 01 Dec 2018, 18:55

radtech wrote:
01 Dec 2018, 15:24
....It seems they've switched users over before testing thoroughly!
Sounds about right...

Mike
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Re: London Bus change over to DMR

Post by 26TM944 » 24 Jan 2019, 16:59

I am still seeing a mixture of MPT and DMR now and some DMR site(s) have enabled encryption.

Currently, the old MPT control channels are still running and at the same power levels. I still see some traffic daytimes. However, a vast number of bus companies have moved over to the Tait/Hytera system.

Time will tell if they all go encrypted.
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Re: London Bus change over to DMR

Post by Metradio » 24 Jan 2019, 18:16

What sites have enabled encryption ?

Mike
Connect Systems CS750 and CS800, Hytera PD-365, Motorola DP4600.
Raspberry Pi 2 and DV4Mini HotSpot.
AOR AR-DV1 Digital Voice Receiver / eSPY on ARD V1.

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Re: London Bus change over to DMR

Post by trainspotter375 » 06 Feb 2019, 09:08

personally i cant see them going encrypted anytime soon, as at the moment when the driver speaks, it sounds like machine gun fire lol

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Re: London Bus change over to DMR

Post by Metradio » 06 Feb 2019, 09:15

All the London Bus sites I can hear are still in the clear..

Mike
Connect Systems CS750 and CS800, Hytera PD-365, Motorola DP4600.
Raspberry Pi 2 and DV4Mini HotSpot.
AOR AR-DV1 Digital Voice Receiver / eSPY on ARD V1.

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