MMR Network – Site upgrades commenced.

Some of you who monitor the MMR Network in greater detail than others may have noticed an interesting message in the raw data of late.

The message does not appear in the data from all network towers, yet, only those that have received upgrades.The works are part of  a 130 million dollar agreement announced between Motorola and the State of Victoria in 2012. The agreement builds on the previous one that was in place between the two entities since the MMR Networks inital inception.

The message basically confirms whether a MMR Network site is now capable of TDMA for those radios that support such, such as the APX series generation of radios. At present the use is very limited, appearing to include only a few technicians and small number of Victoria Police elements with trial APX series radios.

An example of the raw data (from 0164h-0102 – 120 Collins Street) with the aforementioned tell-tale TDMA message is obtained using Pro96com software is presented below;
30 00 00 04 6A 08 66 70 43 A2 23 E1 05/28 17:34:43 TDMA Sync Broadcast – *Invalid* 2004/03/06 14:02 (930) -10

Any site having received an upgrade should show the ‘TDMA Sync Broadcast’ text in the raw data. At this stage a rough timeframe of the site upgrades is believed to be one site per week. I’m uncertain as to how many sites have already received the upgrades but you should be able to find out easily enough if you check the raw data via a sites control channel.

TDMA Wiki Information
MMR Network Upgrade News Article 2012

13 thoughts on “MMR Network – Site upgrades commenced.

    • The site upgrades, yes. Contract includes other upgrades and works elsewhere for parts of the network.

    • For now yes it will and I think it will for a while yet as not all the radios affiliated to the system are TDMA capable.

      Phase II is backwards compatible apparently. This means they can upgrade the system infrastructure to Phase II and that will then permit them to replace their radios over a prolonged period of time. Not in one HUGE expensive outlay.

      All radios on a TGID must be Phase II capable or else it automatically will revert back to Phase I operation. Some reading suggests if a TGID is set to TDMA only, as opposed to DDM then a FDMA only radio will get an out of range signal and get rejected though.

      I just can’t see the MFB, VicPol and AV replacing their entire radio stock for a while. So the sites, even though they’re going to be TDMA (Phase II) capable, the bulk of the radios using the sites at present aren’t thus forcing the site to operate primarily in FDMA (Phase I).

      Another interesting thing is that Phase II actually uses Phase I for simplex operation as there is no timing reference.

      The new generation radios aren’t cheap!

  1. Thanks for the quick reply. Definitely seems like a long term project. Worked with these agencies in the past and getting them on tp P25 in the first place must have been a long term project as well!!. Assume the CFA move to P25 will be Phase 1 if its going to happen soon.

    • Great question regarding the CFA. Whilst I do know that their P25 is currently in the making I have no idea as to if it’s Phase 1 or Phase 2. We’ll see if we can find out.

  2. Okay so here it goes.

    I’ve asked the question and was directed to the radio specs. (Smacking my forehead along the way with a groan of ‘Of course’. The CFA have adopted the Tait’s as most will be aware of.

    They’re rolling out the TM9100 and TP9100 series of radios. The specifications for these radios clearly state Phase 1 (FDMA) only.

    If they were rolling out the TM9400 and TP9400 series then that would be a more worrisome as they are Phase 2 (TDMA) capable.

    The overall network may support Pase 2 on completion but the radios will only be Phase 1.

    Hope that helps.

  3. Point of mention here too, those running Pro96Com will notice if the tower is TDMA equipped by the frequency followed by a /# such as 422.33750/2 – the /# denotes the amount of slots available on that frequency. There is, however still a bug in the program that occasionally says that it has more slots than it really does, ie one shows 156 slots

  4. Hi all. Took a quick look at base 0149 Cheltenham tonight and it has 162.050 and 165.200 in its frequency table. Guessing that this may be CFA SMR access??

    • I suggest you have a look at a few other sites as you may find similar changes.

      These changes were only just taking effect yesterday and today on numerous system sites. I’m tipping it is system wide or going to be.

      I also note the same so far for;
      0164h-0101 – 101 Collins / 525 Collins / 350 Elizabeth

      0164h-0102 – 120 Collins

      0164h-0111 – Mt Dandenong / Ferny Creek

      0164-0126 – One of the two BDA Systems @525 Collins St for Northland SC
      Royal Childrens Hospital,Highpoint SC, Crown Casino, Ethiad Stadium, Federation Square, Western Hosplital, Alfred Hospital & Austin Hospital

      0164h-0166 – BDA System @120 Collins St for Citylink Tunnels, Parliament RS & Flagstaff RS

      0164h-0203 – Keilor – Which has just become Phase 2 capable last week and also reverted back to a 0203 ID from 0165….again!

      Great pick up Darrin on what’s happening on the other side of town (from me). Thanks.

  5. Also found that the CFA RMR sites are popping up, also with the “TDMA Sync Broadcast – *Invalid* 2003/11/09 16:11 (%l) -10
    IIRC CFA’s TM9100 series radios weren’t P25 PII compatible? Unless there are plans to get Vicpol on there in the future, or the old “do it once, do it properly” has come into play?

    • Correct about CFA radios not being Phase II capable.

      There has been talk that Vicpol are watching and rubbing their hands with a grin on their face. Let someone else set up the hard part of the new infrastructure, then maybe jump on board later and splash half the cash, upgrade sites, get dual band radios which can work on VHF and UHF so they can have both the RMR and MMR in one radio. Although this is only industry speculation.

      Would also have less logistics & support costs in having to support multiple radio types and be able to move vehicle assets more freely without refitting if they move vehicles between rural and metro areas.

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