More federal freqs in OKC

[Gilligan]

I've been doing quite a bit of searching of the federal bands lately and discovered some new freqs. Found and submitted an FBI repeater that some agents have been using for surveillance ops (mixed clear voice and DES encryption). Some of the following freqs are P25, so maybe someone w/ a digital scanner can give a listen.

167.2375 - 167.9 PL (FM): FBI Repeater (mixed mode) - now identified

167.2625 - 85.4 PL (FM): clear voice (not P25/DES)
165.725 - APCO-25 (FM)
163.125: tone unknown (FM): clear voice; this is usually customs freq
168.350 (FM): DES encryption (very close to VA Hospital freq of 168.3625)

And here's the list of unidentified federal freqs in the database just to refresh everyone's memory that there are still some to ID:

164.3750 - 156.7 PL (FM): Mobiles talking (simplex) about roads and traffic (about 1 year ago)
165.6125 - CSQ (FM)
167.7875 - CSQ (FM): DES Encryption
168.2750 - CSQ (FM): DES Encryption
409.9500 - APCO-25 (FM)
409.9625 - APCO-25 (FM): Repeater w/ loose protocol
409.9000 - CSQ (FM): Voice paging
410.8250 - 173.8 PL (FM)
411.3750 - 036 DPL (FM): DTMF signalling, maybe related to OKC tornado sirens
419.1500 - 100.0 PL (FM)
419.4000 - 136.5 PL (FM)

 

[mam1081]

411.3750 - 036 DPL (FM): DTMF signalling, maybe related to OKC tornado sirens

I'm fairly certain that is NOT used for the OKC tornado sirens. They have their own UHF channel for that.

It seems like someone in OKC coppied that list and mailed it into Monitoring Times or some magazine like that - I saw that exact list with the same wording the the Jan or Feb issue. Copy cats!

 

[freqscout]

OKC does not interface a federal frequency for tornado sirens. The base might have their own similar system though.

 

[Gilligan]

I'm fairly certain that is NOT used for the OKC tornado sirens. They have their own UHF channel for that.

I know that it is not used directly for the sirens, but the DTMF sounds identical to the 453.975 freq, just weaker. I kind of wondered if it was a possible link between Norman and OKC (isn't the main NWS office in Norman?).

OKC does not interface a federal frequency for tornado sirens. The base might have their own similar system though.

As I'm pretty sure you have connections to the city government, I will say that my guess must be wrong. But it would be interesting to find what exactly it does control. Sirens in another city, maybe? Moore? That would explain the weaker signal.

It seems like someone in OKC coppied that list and mailed it into Monitoring Times or some magazine like that - I saw that exact list with the same wording the the Jan or Feb issue. Copy cats!

That list has been in Oklahoma County's Unidentified Federal & Military category for months. I personally found many of those freqs and passed them off to Chris Parris for Monitoring Times Fed Files. He mentioned that he might list them -- now I want to get me a copy of Monitoring Times and see what he wrote! Cool![/quote]

 

[freqscout]

There is no telling what kind of telemetry there might be floating around on the base and in other bases for that matter. There is surely some sort of rational explanation.

It could also be status info for a number of things. The DTMF's you hear on the OKC sirens freq are merely status checks/reports for the control system. It polls them frequently and prints out the report as well as showing it's status on screen.

 

[Gilligan]

Some more freqs:

168.3500 - CSQ (FM): DES Encryption (NOTE: Different from 168.3625)
170.9500 - CSQ (FM): DES encryption

Sorry about 165.725. It's already in the database as US Marshals federal courthouse security.

By the way, if you want to avoid hearing the DES encryption on your scanner, just program the freq in a few times w/ different common PL tones and you will block the encryption. Like Customs (100.0 PL), FBI (167.9 PL), & DEA (156.7 PL), for example. Then if clear voice shows up (as on the FBI repeater occasionally), you will catch it.