Plattsmouth Police P25

[obijohn]

It would appear that the days of Platts. PD analog on 851.400 are coming to an end.

I heard several transmissions from the "consoles" in P25 for the first time today.

It would appear that the upgrade is happening, and I would expect that the Sheriff's dispatch will be
next.

 

[K0RPT]

This is Cass Co right?

Do you think they will change the repeaters like the Gretna machine?

Gretna is the only one I can hear here in Lincoln.

Thanks

Ed

 

[realgeo]

Howdy, guys!

Add CCSO Southeast to that list, as well!

I heard them running P25 for the first time last night (11/17/2008) and several transmissions tonight (11/18/2008).

Anyone have the NAC that's being used?

73's

 

[NeFire242]

Nice to see progress finally pushing forward. Now if we could only figure out how to man that squad down there at night we'd have it made.

 

[obijohn]

As the radio shop gets to each site and upgrades the 4 wire cards to 4 wire E & M, you will see more
P25 activity. The problem with Cass was that they couldn't transmit in digital from the consoles because the microwave didn't have a circuit to key the repeater.

To understand E&M, just wicki it.

E&M is an old TELCO term for "ear & mouth" which indicates activity conditions for each circuit.

It is fascinating that after over 50 years, it is still in use and relevant.

 

[obijohn]

I guess they gave up on getting the microwave to work. They installed a control station for Plattsmouth PD today.

 

[obijohn]

And it would appear that the PD switched over to P25 full time today.

 

[realgeo]

Howdy, Obijohn and all!

I am thinking that the P25 traffic was probably a test, as they've been operating in Analog mode both yesterday and today both when I was listening.

Also, it seems that the installation of the control station would sooner be a temporary measure while they're making changes to the microwave for all-digital operation.

As I recall it, the same process was implemented prior to the Murray tower going all-digital - they used a control station prior to that.

73's

 

[SCPD]

So when everything on the ORION network is up and running, will any of this be able to be monitored in Lincoln? I have monitored stuff from the Greenwood tower fairly successful but that is on VHF, not ORION. Anyone know if this is feasible or not?

 

[realgeo]

So when everything on the ORION network is up and running, will any of this be able to be monitored in Lincoln? I have monitored stuff from the Greenwood tower fairly successful but that is on VHF, not ORION. Anyone know if this is feasible or not?

Howdy, Dak48!

You should be able to hear the "West" tower in Lincoln, provided you're in the Northeast part of Lincoln, though that one is still running pure Analog mode.

At this time, the Cass County 800MHz. system, even in P25 mode, will not be a part of the ORION system in Douglas County. This system is a straight, 3-repeater conventional (not trunked) system which happens to have Quantar repeaters that are capable of P25 (IMBE) communication. The repeaters are all connected back to Plattsmouth via a 900MHz. microwave system.

More than likely, there will be some sort of "patch" or interop capability between Cass County Dispatch and other surrounding systems, but for now, no hook-up with the Douglas County system.

73s

 

[obijohn]

Howdy, Obijohn and all!

I am thinking that the P25 traffic was probably a test, as they've been operating in Analog mode both yesterday and today both when I was listening.

Also, it seems that the installation of the control station would sooner be a temporary measure while they're making changes to the microwave for all-digital operation.

As I recall it, the same process was implemented prior to the Murray tower going all-digital - they used a control station prior to that.

73's

I didn't listen for a few days...You're right George. They're back to analog. Have you been hearing any activity on the new unlicensed Weeping Water site? Same frequency as the NE tower.

 

[NeFire242]

Yeah Lincoln should be no problem to receive Cass county since their "West" tower is KPTM lol

 

[KF0SKV]

Springfield Sq1 was patched over to Cass County Dispatch over 39.980 this morning to a Stroke Victim in Cedar Creek, M/A with Louisville. But the patch was on the Sarpy County side.

I didn't hear Cass County attempt to patch Louisville over to Springfield, so perhaps Cass still doesn't have the abitlity to patch as of this time, or Louisville didn't requst a patch.

 

[realgeo]

Springfield Sq1 was patched over to Cass County Dispatch over 39.980 this morning to a Stroke Victim in Cedar Creek, M/A with Louisville. But the patch was on the Sarpy County side.

I didn't hear Cass County attempt to patch Louisville over to Springfield, so perhaps Cass still doesn't have the abitlity to patch as of this time, or Louisville didn't requst a patch.

Cass County doesn't run a trunking system and currently doesn't have the ability to patch to the Sarpy County system, so the patch HAD to happen the way you described it!

73s

 

[KF0SKV]

Kinda off topic, few years ago, I was flipping around the channels on an Irvington portable, somebody at ORION left the 39.980 patch open all day. Heard Malcom VFD and Humphrey VFD get toned out, along with some E-2 skip.

I don't remember the rest of the traffic, but it was booming in just like if the dispatcher was sitting next to me.

 

[obijohn]

Anyone have the NAC that's being used?

73's

George: Cass County's and Plattsmouth PD's NAC is 048.

The PD appears to have FINALLY switched over to P25 CAI on a permanent basis.

Also, as you pointed out earlier, Cass's 853.875 South East Zone is fulltime P25 CAI.

 

[SDOG]

Cass County P25

You are correct... PPD is now p25 all the time... And you will find that 853.875 is used at all three sites in p25. The listed NE freq is used at both the NE and SE sites via PL changes. Makes for good coverage along the 75 corridor.. Enjoy!!

George: Cass County's and Plattsmouth PD's NAC is 048.

The PD appears to have FINALLY switched over to P25 CAI on a permanent basis.

Also, as you pointed out earlier, Cass's 853.875 South East Zone is fulltime P25 CAI.

 

[realgeo]

You are correct... PPD is now p25 all the time... And you will find that 853.875 is used at all three sites in p25. The listed NE freq is used at both the NE and SE sites via PL changes. Makes for good coverage along the 75 corridor.. Enjoy!!

Howdy, SDOG! Long-time!

The three-site SE channel certainly explains what I've been noticing this afternoon. Does the dispatcher always talk on the same transmitter? Do the user radios simply change input NAC codes to select the tower they're on?

Seems to me that the "NE" channel is also in-use at the Manley site. I've been around that area several times when that channel comes online and have had full signal strength, only to notice a drop in signal when the KOTD transmitter comes up.

Also, for CCSO - since the "SE" channel is active everywhere, is it reasonable to assume that the current 3-channel model will be modified to support other functions? For example, all CCSO traffic would be on the multi-site "SE" channel and the other two channels would be used, say, for County Roads or other functions.

73s

 

[realgeo]

You are correct... PPD is now p25 all the time...

Howdy, one and all!

Actually not all the time! I'm listening to PPD on analog right now!

Probably a user-related issue (i.e. wrong channel on the radio).

73s

 

[obijohn]

WOW...A whole lot of changes. I find it interesting that Cass County can build out all this
new stuff without bothering to license any of the new repeaters. WQET-706 is unchanged.

I have heard the new 853.300 repeater for several months now. It takes real 'nuts' to do
this without bothering to even coordinate it first.

I can't believe that Brad Lahm/Bill B. are "clueless" to this. Shame on their "consultant".