What is this doing?

App_rpt-users
1

Every so often, when the repeater system ID's at the top of the hour (current_time), Ill hear it doing all kinds of weird noises. It may happen 3-10 times one morning, then it stops and I dont hear it do the weirdness for maybe weeks.

System:
3 radio pairs (RX+TX), for 2m, 1.25m, and 70cm, + connection to my FreePBX VoIP phone system with SIP trunk. All controlled by ASL on an RPi3 with 2 URIx interfaces and a custom one from a friend.

Today I happened to be in Asterisk and caught it:

-- <DAHDI/pseudo-2081886297> Playing '/tmp/current-time' (language 'en')
-- Hungup 'DAHDI/pseudo-2076617695'
-- Hungup 'DAHDI/pseudo-1871522775'
-- Hungup 'DAHDI/pseudo-2081886297'
-- Hungup 'DAHDI/pseudo-548779644'
-- Hungup 'DAHDI/pseudo-1364699765'
-- Hungup 'DAHDI/pseudo-824519649'
-- Hungup 'DAHDI/pseudo-1065815035'
-- Hungup 'DAHDI/pseudo-280361340'
-- Hungup 'DAHDI/pseudo-262869717'
-- Hungup 'DAHDI/pseudo-1556903203'
-- Hungup 'DAHDI/pseudo-1739410651'
-- Hungup 'DAHDI/pseudo-669096565'
-- Hungup 'DAHDI/pseudo-1759060813'
-- Hungup 'DAHDI/pseudo-715568609'
-- Hungup 'DAHDI/pseudo-609943421'
-- Hungup 'DAHDI/pseudo-961514971'
-- Hungup 'DAHDI/pseudo-2067794897'
-- Hungup 'DAHDI/pseudo-2044530609'
-- Hungup 'DAHDI/pseudo-466951470'
-- Hungup 'DAHDI/pseudo-1196984699'
-- Hungup 'DAHDI/pseudo-1414498870'
-- Hungup 'DAHDI/pseudo-1480966533'
-- Hungup 'DAHDI/pseudo-1695785476'
-- Hungup 'DAHDI/pseudo-1046809920'
-- Hungup 'DAHDI/pseudo-1669517558'
-- Hungup 'DAHDI/pseudo-88337028'
-- Hungup 'DAHDI/pseudo-384454384'
-- Hungup 'DAHDI/pseudo-772707945'
-- Hungup 'DAHDI/pseudo-1899035382'
-- Hungup 'DAHDI/pseudo-734458439'
-- Hungup 'DAHDI/pseudo-501134215'
-- Hungup 'DAHDI/pseudo-1354447324'
-- Hungup 'DAHDI/pseudo-1051564481'
-- Hungup 'DAHDI/pseudo-414740210'
-- Hungup 'DAHDI/pseudo-1617741702'
-- Hungup 'DAHDI/pseudo-528144488'
-- Hungup 'DAHDI/pseudo-1653365341'
-- Hungup 'DAHDI/pseudo-270146717'
-- Hungup 'DAHDI/pseudo-1297655779'
-- Hungup 'DAHDI/pseudo-567145489'
-- Hungup 'DAHDI/pseudo-406004927'
-- Hungup 'DAHDI/pseudo-1499290237'
-- Hungup 'DAHDI/pseudo-363142793'
-- Hungup 'DAHDI/pseudo-1719400187'
-- Hungup 'DAHDI/pseudo-931193094'
-- Hungup 'DAHDI/pseudo-700352840'
-- Hungup 'DAHDI/pseudo-1684709513'
-- Hungup 'DAHDI/pseudo-836290559'
-- Hungup 'DAHDI/pseudo-219003181'
-- Hungup 'DAHDI/pseudo-285145924'
-- Hungup 'DAHDI/pseudo-553131898'
-- Hungup 'DAHDI/pseudo-779625784'
-- Hungup 'DAHDI/pseudo-1250908018'
-- Hungup 'DAHDI/pseudo-1393767773'
-- Hungup 'DAHDI/pseudo-1800629083'
-- Hungup 'DAHDI/pseudo-1406945609'
-- Hungup 'DAHDI/pseudo-1336079656'
== Refreshing DNS lookups.
k5ktf-vhf*CLI> iax2 show registry
Host dnsmgr Username Perceived Refresh State
192.168.###.###:4569 N 146810 192.168.###.###:4569 60 Registered
162.248.92.131:4569 Y 425632 71.###.###.###:4568 181 Registered
162.248.92.131:4569 Y 425631 71.###.###.###:4568 181 Registered
34.105.111.212:4569 Y 425630 71.###.###.###:4568 180 Registered

(personal IPs above intentionally obfuscated, but I assure are correct).

Normally if I kerchunk the system, it only shows 3 hangups:
-- Hungup 'DAHDI/pseudo-1227108959'
-- Hungup 'DAHDI/pseudo-1778980499'
-- Hungup 'DAHDI/pseudo-899056373'

So wondering what are all those other "hangups" that happen sometimes?
And/or is there some commands/logs to dig in deeper to figure out what is going on there?

And yes, plans are in the works to obtain a new RPi5 and load ASL3 (and migrate APRX and RMSGW all onto the 1 pi)-- just cant justify extra expenditures at the moment living on severance pay :slight_smile: .....

TIA for any info.
Jim
K5KTF
425630/1/2

2

Could you state how the freepbx system is connected ?
sip/iax trunk/extension full/part time ?

3

Its just assigned/registers an IAX extension in FreePBX.
After monitoring it the last couple days, it seems to only happen in the mornings, so I am now wondering if there is some RF thing going on, like somehow triggering another repeater or something via propagation, almost sounds kinda like a feedback loop. Still monitoring/digging...

4

Do you have dwswitch installed ? Or anything else using usrp ?

5

Not that I know of.....
Again, its not all the time, usually just in the mornings, clears up by noon, and not every day, so Im becoming convinced its something RF...
I need to find me a spectrum analyzer to sit here and watch when its happening...

6

You are really talking about rx noise.
A good place to start is LED lights. CFL's too. Even from next door to you.

A tx may also be spurious as well as a computer..

7

Are you using CTCSS or DCS in? You should be, if not.

It's also possible to get a long-running set of "Hangup" messages like that if you have a high-latency internet connect or something is dropping random IAX packets somewhere between nodes.

However, in general, it's not a problem unless you're seeing it impact something.

8

Oh yes, all 3 RX radios have CTCSS enabled with squelch at 0.
TX VHF FM (our coordination body) requires any new repeaters use CTCSS.
All network lines/switches are CAT6 and gig, even though the older Pi NIC is only 10/100 (internet link is 600x35 cablemodem).
Sometimes when this weirdness is happening, Ill hear the system ID my call in CW, but it adds like 2 extra letters at the end, I think "LF"? (Im only up to 5 words per hour learning code :slight_smile: ). I should change it over to voice ID and see what she says then...lol

9

I re-read this thread. Are you on an old version of ASL? If so, many many many improvements have been made. I'd suggest upgrading to ASL3 before spending more time troubleshooting this.

10

I have installed a test ASL3 on a VM on my server, to see what its got/give it a test run (no radio attached).
I do plan on upgrading to a RPi5 and ASL3, and migrate my APRS igate and RMSGW packet all onto one Pi.
But I have to find another job first before any more expenditures :slight_smile: (whole team got cut last month, but got severance, so not too bad ATM...)

11

UPDATE: Monitoring the system this morning, the "feedback noise" is coming in through the UHF/70cm repeater radio. I noticed it's CT triggering after a round of the noise.
So appears ASL is not at fault, working as designed, there is something else going on RF/radio wise.
Ill take the NanoVNA H4 out there later today and make sure all is tuned up, and/or see if something (duplexer, SWR, etc) may have went out of spec.

Thanks for all the suggestions/help.
Jim