HamNet Experimental Trunking System

[522]

Just stumbled across this:

HamNet Experimental Trunking System

DEC	HEX	Mode	Alpha Tag	Description	Tag
1	001	D	Local	Local	Ham
938	3aa	D	Salt Lake	Salt Lake	Ham
939	3ab	D	Tooele	Tooele	Ham
974	3ce	D	Wide	Wide	Ham
975	3cf	D	Sys Ops	Sys Ops	Ham
4010	faa	D	Event A	Event A	Ham
4011	fab	D	Event B	Event B	Ham
5030	13a6	D	SLYARC	Bridge to Salt Lake Youth Repeater System	Ham
5031	13a7	D	ASL	Public Allstar Bridge	Ham
10294	2836	D	SkyHubLink	Bridge to SkyHubLink	Ham
57626	e11a	D	Admin/Testing	Admin/Testing	Ham

 

[enosjones]

Yeah tim added it to the database last week or so, does anyone know if its expanding past the Wasatch front?

 

[kb5udf]

Does anyone have a website with any details on this system? Ham callsign(s) involved?

 

[enosjones]

callsign is listed either with the system or the fcc licenses, its based from riverton

 

[enosjones]

options for p25 or dmr or dstar

 

[KK7GKG]

Hello!
This is the system that I own
It is a Experimental Trunking system built in the ham band to allow amateur radio operators with Trunking capable radios to learn about Trunking without needing to go through the hassle of the major systems in the area

As of right now we only have hotspots on our system but are working to add some Higher Powered Sites

our website is just kk7gkg.com/trunking I am working on updating our site to help get users on the system
We are also working on Testing out bridges to other Modes and Systems

 

[kayn1n32008]

Hello!
This is the system that I own
It is a Experimental Trunking system built in the ham band to allow amateur radio operators with Trunking capable radios to learn about Trunking without needing to go through the hassle of the major systems in the area

As of right now we only have hotspots on our system but are working to add some Higher Powered Sites

our website is just kk7gkg.com/trunking I am working on updating our site to help get users on the system
We are also working on Testing out bridges to other Modes and Systems

Is there a web site with details? In the past my self and a couple friends have experimented with Cap+ on the ham bands. We are now almost exclusively using P25 conventional due to the poor voice quality, this would definitely interest a few of us locally.

 

[BenScan]

Hamnet website

 

[522]

Is there a web site with details? In the past my self and a couple friends have experimented with Cap+ on the ham bands. We are now almost exclusively using P25 conventional due to the poor voice quality, this would definitely interest a few of us locally.

He mentioned the website in his post that you liked and replied to.

 

[KK7GKG]

I need to update that site with the New information and how to join the system

 

[kayn1n32008]

I need to update that site with the New information and how to join the system

I'm quite interested in what you are using for hardware for this system.

 

[KK7GKG]

it’s Just any MMDVM Duplex Hotspot Gear right now with modified firmware you can use the Repeater builder MMDVM Repeater Board

I’m running an APX8000H and APX6000 on the system

 

[kayn1n32008]

it’s Just any MMDVM Duplex Hotspot Gear right now with modified firmware you can use the Repeater builder MMDVM Repeater Board

I’m running an APX8000H and APX6000 on the system.

You are running 2 duplex Hotspot side by side to create a multichannel site, one as a control channel and one as as a voice channel?

Our P25 infrastructure is a Quantar and Daniels/Codan MT-4e. Only conventional though.

Most of us are using XTS2500/5000's and one of us is running APX7000, VP8000 and a NX5300.

 

[KK7GKG]

Yeah
its 2 MMDVM Hotspot modems with modified firmware and a application in Linux that runs it all
I haven't gotten quantars to work yet but in the future I might add astro25 Trunking core so that people running Commercial Trunking equipment can join in
I Haven't messed around with the VP8000 or NX5300 stuff yet but I have tested the following stuff on my system and it is known to work
APX8000H
APX8000
APX7500
APX7000
APX6500
APX6000
APX4000
APX1500
APX1000
APX900
XTS5000
XTL5000
XTS2500
XTL2500

Not tested:
XTS4000
XTS3000 (Sold Mine)
XTS1500
PM1500

 

[kayn1n32008]

Not tested:

XTS3000 (Sold Mine)

Astro Saber and XTS3000 are not capable of OBT 9600Baud trunking. Only 800MHz versions could do 9600Baud trunking, and only with VERY specific HOST and DSP versions.

 

[KK7GKG]

Astro Saber and XTS3000 are not capable of OBT 9600Baud trunking. Only 800MHz versions could do 9600Baud trunking, and only with VERY specific HOST and DSP versions.

I have a 800MHz one that can do Type II but I’m not licensed to use 800

 

[Echo4Thirty]

How are you making this system legal for part 97 usage. Specifically the control channel IDing, the users IDing on both the inbound control channel and voice channels?

Also the control channels broadcasting continuously might be an issue for the FCC.

These have been the biggest legal hurdles to centralized control channel Trunking in the amateur bands. I am curious how you mitigated these issues to be legal for both the system operator and the users.

Edit: I see your sites currently have one control and one voice channel, so the user can at least ID on the singular voice channel but how are they legally IDing on the inbound control channel? Since this is a custom solution was code written to insert the system call sign on the outbound control channel as well as the voice channels every 10 min? Commercial solutions would have part 90 IDing which allows for one frequency IDing the entire system. Part 97 does not have this provision.

 

[Project25_MASTR]

How are you making this system legal for part 97 usage. Specifically the control channel IDing, the users IDing on both the inbound control channel and voice channels?

Also the control channels broadcasting continuously might be an issue for the FCC.

These have been the biggest legal hurdles to centralized control channel Trunking in the amateur bands. I am curious how you mitigated these issues to be legal for both the system operator and the users.

Edit: I see your sites currently have one control and one voice channel, so the user can at least ID on the singular voice channel but how are they legally IDing on the inbound control channel? Since this is a custom solution was code written to insert the system call sign on the outbound control channel as well as the voice channels every 10 min? Commercial solutions would have part 90 IDing which allows for one frequency IDing the entire system. Part 97 does not have this provision.

Control channel ID's in CAI theoretically. Also, if the control channel rolls every 10 minutes you could ID at that point.

 

[Project25_MASTR]

I'm quite interested in what you are using for hardware for this system.

Have you seen NEXCOM yet?
NEXCOM - Nationwide EXperimental COMunnications
Based of the DVM Project which should support DFSI though I know there hasn't been anyone who has tested Codan's DFSI implementation.

 

[Echo4Thirty]

The system IDing could be easy as you stated or software could pause the CC data stream long enough to ID in morse. IDing the ISP from the subscriber would be more difficult.

When we looked into a trunked system that had a control channel we ran into legal issues involving proper identification of the subscriber on all frequencies they transmit on, the lack of part 97 compliance in IDing every frequency of the system since no commercial system supported IDing more than one frequency in the system and also the broadcasting clause of part 97 for the outbound control channel.

If tech has progressed to address these issues then that opens up a ton of new technologies that can be legally used for DMR, NXDN and P25.

Of course one could always use Trunking that was not continuously broadcasting a control channel. LTR and NXDN type D for example.