INTEROPERABILITY FREQUENCIES??

CATAWBA911 · Post by **CATAWBA911** » Wed Mar 20, 2002 5:04 am

DOES ANYONE KNOW OF ANY NON-FEDERAL INTEROPERABILITY FREQUENCIES???

higginsrk · Post by **higginsrk** » Wed Mar 20, 2002 6:28 am

I'm not sure what you mean by "interoperability". If you mean frequencies that can be used by multiple individuals/groups/agencies without needing a specific license or channel assignment, you might want to look into the Multiple Use Radio Service. No license is required, but output is limited to two watts. The frequencies are:
Channel One 151.820
Channel Two 151.880
Channel Three 151.940
Channel Four 154.570
Channel Five 154.600

Tom in D.C. · Post by **Tom in D.C.** » Wed Mar 20, 2002 10:04 am

You are probably looking for nationwide intersystem channels, which are primarily police frequencies Last time I looked, which was a long time ago, they were in the FCC regs.

In the DC area we have about five FD mutual aid channels, all on 154/155 mHz, plus the standard 155.340 med channel, plus the UHF med channels. (There are also a number of new 800 mHz trunked/coordinated channels to avoid the communications messes of past history.) If this is what you're looking for then I'm fairly certain the info is already available in your area from the radio techs in your FD and adjoining FD's.

Tom, W2NJS
...in D.C.

P.S. Hello Kirk H.

whatnext · Post by **whatnext** » Wed Mar 20, 2002 1:17 pm

Fire is 154.280 Base station to Base Station
154.295 Mobile to Mobile

Police is 155.475

These are the NATIONWIDE mutual aide Freqs.

R F Burns · Post by **R F Burns** » Thu Mar 21, 2002 7:58 pm

Not sure what you meant about "federal," but these are the 800MHz NPSPAC national mutual aid interop channels:

MUTUAL AID CHANNELS

866.0125 - CALLING, TAC 1
866.5125 - TAC 2
867.0125 - TAC 3
867.5125 - TAC 4
868.0125 - TAC 5
NATIONWIDE FIRE MUTUAL AID - 868.9875

NATIONAL MUTUAL AID PL TONE - 156.7 PL 5A

-RFB

PS: you need to be licensed for these!

Will · Post by **Will** » Fri Mar 22, 2002 4:54 pm

On 2002-03-20 09:28, higginsrk wrote:
I'm not sure what you mean by "interoperability". If you mean frequencies that can be used by multiple individuals/groups/agencies without needing a specific license or channel assignment, you might want to look into the Multiple Use Radio Service. No license is required, but output is limited to two watts. The frequencies are:
Channel One 151.820
Channel Two 151.880
Channel Three 151.940
Channel Four 154.570
Channel Five 154.600

ALL these frequencies are now MURS and ARE narrow band 2.5khz deviation, 11.5 khz bandwith, TWO watts MAX ERP. (another citizens band!!!!)

Post by Pj » Sat Mar 23, 2002 2:08 am

If you can find dept's that actually use 155.475 (not as road job channels)...good luck. Most State/counties use a repeaterize channel or anyother scheme. Many depts also just don't know about it either.

n9ysu · Post by **n9ysu** » Sat Mar 23, 2002 5:45 am

155.475 is alive & well in Illinois.. Designated as the Illinois State Police Emergency Radio Network (ISPERN), it is in every police unit in the state (I'm sure with a few exceptions). The only ISPERN base units allowed are at the state police posts. All other departments use mobiles/portables only. It is great for pursuit coordination, as well as passing on information from surrounding towns in a hurry without having to call each dept individually. All wide area broadcasts go from the mobile to ISP post to wide area rebroadcast.. There is a less formal state wide freq 155.055 (IREACH).

streaker · Post by **streaker** » Sat Mar 23, 2002 11:03 am

155.475 is also used in Wisconsin, similar to Illinois, except it it called WSPERN. Also 154.280 We call MARC Mutual Aid Radio Channel and is suppose to be a Multi Agency channel as I have been told. Although MARC is not very well used here, it does exist. Wisconsin also has a frequency liscensed as Point to Point for Communication with Sheriff and Police Base stations, Mobile or Base to Base.

AngelFire_91 · Post by **AngelFire_91** » Sat Mar 23, 2002 9:18 pm

On 2002-03-20 09:28, higginsrk wrote:
I'm not sure what you mean by "interoperability". If you mean frequencies that can be used by multiple individuals/groups/agencies without needing a specific license or channel assignment, you might want to look into the Multiple Use Radio Service. No license is required, but output is limited to two watts. The frequencies are:
Channel One 151.820
Channel Two 151.880
Channel Three 151.940
Channel Four 154.570
Channel Five 154.600

Hello,
Does anybody know if there are UHF Freq's like these?

AngelFire_91 · Post by **AngelFire_91** » Sat Mar 23, 2002 9:25 pm

I know about the GMRS and FRS, and I have Tech +, so I'm aware of the 70cm band, I'm just woundering if there are any that are MURS in the UHF.
Thanks

Jonathan KC8RYW · Post by **Jonathan KC8RYW** » Sat Mar 23, 2002 9:36 pm

A short answer: No.

As far as I know, there are no other free services in the UHF band. Maybe the FCC will surprise everyone again, and pull a MURS on UHF. Who knows.

Mike 701 · Post by **Mike 701** » Sun Mar 24, 2002 8:13 am

155.475 in New Jersey is SPEN 2 - But it is not in everyu station, but I would assume a number of stations do, I have heard depts. talk on it. Officers also use it as a talkaround. We have four SPEN channels or State Police Emergency Network frequencies, SPEN 1 is used primarily for dept. to dept. use. The other three are not used have as much. SPEN 4 is the disaster frequency for this area, used very much on sept. 11.

<font size=-1>[ This Message was edited by: Mike 701 on 2002-03-24 11:17 ]</font>

Josh · Post by **Josh** » Sun Mar 24, 2002 8:32 am

On 2002-03-24 00:36, KC8RYW wrote:

As far as I know, there are no other free services in the UHF band.

The only license free service in UHF is FRS. Not to be confused with 70cm ham radio or GMRS.

Just had to clarify...
-Josh

Jaqx · Post by **Jaqx** » Sun Mar 24, 2002 9:09 am

155.475 is also in occasional use in North Carolina. Most agencies on VHF have it as a mutual aid channel and sometimes use it as a "chit-chat channel." The NC Highway Patrol uses low band for primary communications but has 155.475 in their high band radios as ch. 5.

I don't know of any other nationwide freqs. besides what has already been mentioned.

Post by Pj » Sun Mar 24, 2002 11:23 am

By any chance, do you have handy the freq's and pl's for NCHP? I visit fam down there once in awhile and it would be nice having some channels going to Durham. You can private message me if you wish. I can't seem to find the right channels and pl, and i thought they were on a trunked system.