[TheList] Christchurch Ambulance now digital

Wed Aug 3 12:59:09 AEST 2011

Ambulance have never been on ESA to the best of my knowledge. When I was 
in Telecom in the early 90's we installed their network on the then ES 
band which was later renamed ESB. As you state, the Old Police analogue 
mobile network was ESA and the new Digital network is in the ESB band 
where Ambulance has been for about 20 years.

Regards,

Neill.

On 3/08/2011 2:54 p.m., Scanhead wrote:
> Perhaps the confusion is because the police are using ESB band with 
> P25 trunking as the replacement for ESA... Which is normally 
> (and probably still) where ambo operates.
>
> Can anyone confirm that current digital scanners are still not able to 
> follow tait P25 trunked? From memory it was to do with the data rate 
> of the control channel (could be wrong). I could get unencrypted voice 
> with my uniden digital but was never able to follow the conversation. 
> Thats why I started looking at software radio etc.
>
> It is ironic that the P25 system came into being because of a need for 
> radio systems and services to inter-communicate, and now it is 
> what separates them. Some will argue that P25 radios can communicate 
> with the old analog systems (mixed mode), but I've been told this is 
> not possible with a trunked system. (again, could be wrong)
>
> So what are the advantages of P25 over analog if secure communication 
> is not an issue?
>
> Scanhead.
>
> On Wed, Aug 3, 2011 at 12:17 PM, Neill Ellis <tgsnoopy at gmail.com 
> <mailto:tgsnoopy at gmail.com>> wrote:
>
>     Hi Grunter,
>
>     I think you might be on to something. I'm pretty sure the media
>     would have let us know if Ambo's were trialling or had gone secure
>     digital.
>
>     Regards,
>
>     Neill.
>
>
>
>     On 3/08/2011 11:50 a.m., Grant Carroll wrote:
>
>         Hello,
>         I am still listening to ambos on the same frequencies in the
>         ESB band they have been on for ages. This is on an analogue
>         scanner and my digital scanner with no "P25" coming up to
>         suggest the transmissions are digital and obviously if I can
>         hear them on an analogue scanner they aren't. Am I missing
>         something here? Are they being simulcast on analogue and new
>         digital frequencies for now or is their going digital just a
>         vicious rumour?
>         Cheers guys.
>         Grunter1.
>
>
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