Fairfax County Public Safety radio systems - Q&A

Jeffrey Holmes, KD4VZN, Fairfax County Radio/Wireless Services Center answers questions after his presentation about public safety radio systems implemented in Fairfax County, VA.

Presentation about National Capital Region Emergency Communication Cache

This presentation was given on 2021-07-23

00:00:00 Fairfax County communication systems administration and national Capitol Region Fairfax County Comms Cache
00:01:35 Open and closed radio communication systems
00:04:11 Is proper radio ID required for reception of radio traffic?
00:08:32 Fighting interference on the radio channels
00:11:46 Is traffic on Fairfax County digital networks encrypted?
00:14:06 Frequency coordination and information on Rf exposure levels for FFX County radio sites
00:16:23 Repeater site setup
00:18:06 RF sites are synchronized to GPS clock to allow them simultaneous transmissions
00:19:55 How are the RF sites linked?
00:21:45 Construction accidents
00:22:30 System resilience through redundancy
00:24:42 Public safety repeaters and remote sites
00:26:40 Use of simplex channels in the radios


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[coreybabcock]

I can actually hear right now FF all the way up here in Rockville MD

[coreybabcock]

I had a uniden scanner the older one was deaf here in Montgomery county MD but would never shut up in FF and PW Co

[coreybabcock]

Yes a Apx and xts can be setup as a nas scanner

[coreybabcock]

Easy to look up the licensee on radio reference

[coreybabcock]

Yea I had to create a conventional code plug for my radio and I use radio wide scan mode

[coreybabcock]

I can see the IDs of the units on my EF Johnson radio and the TG too it's pretty cool my EF Johnson radio is setup as a Nas scanner works ok but I would love to know how I can get it to actually track trunks it's a P1 radio but I can still hear quite a bit

[coreybabcock]

Makes sense about the illegal carrier knocking down the system or site

[coreybabcock]

Yes metro had that cellular redistribution system

[coreybabcock]

Do they have any Old equipment at the shop they wanna get rid of ?

[coreybabcock]

What you all do with the equipment they remove

[coreybabcock]

I think I seen TG 1001 and 1311 and others in the 5 digit numbers too

[coreybabcock]

I think encryption is ok for the most part but I still wanna see transparency too

[coreybabcock]

So is most of HT, s and mobile units still phase 1 ?

[coreybabcock]

Simplex would Also be known as talk around

[coreybabcock]

I still wanna Learn how to really optimize my radio and yes I can make it so it won't affiliate in the PC configure 2.18.6