Remote AllStar/Echolink Node Issues --ASL3/RPi4B/DINAH--

I'm hoping to help one of my clubs bring AllStar & Echolink to a repeater which is located where there's no hope of bringing an internet connection. The Server is recognized by AllStarLink. The radio is full quieting into the repeater on LOW (25W) and on receive from the repeater at my location. Using RepeaterPhone (iOS) I can connect to the node and be heard over RF from the repeater. I do not hear audio back to RepeaterPhone on my iPhone. The 2M repeater in use has a standard split and uses CTCSS on Tx/Rx. The DINAH is in default mode; no traces were cut. The radio is set to use 1200bd. The firewall on the RPi does not block any outgoing traffic, neither does my router/security appliance from the relevant ip address. Why no audio out over AllStar.

I've built a node using the ASL3 appliance, a DINAH, and a Kenwood TM-271A modified as per http://n1vg.net/. I have modified and used four of these Kenwood radios and am presently using one other for a WinLink VHF Gateway with a MastersCommunication DRA. Others have had other purposes, but are now in a bin waiting their turn at glory.

Here's the audio CLI as it stands. The 20*20=400msec "RX On Delay" was necessary to stop ping-ponging:

  1. Select active USB device
  2. Set Rx Voice Level using display (currently '500')
  3. Set Transmit A Level (currently '500')
  4. Set Transmit B Level (currently '500')
    B) Toggle RX Boost (currently 'enabled')
    C) Toggle Pre-emphasis (currently 'disabled')
    D) Toggle De-emphasis (currently 'disabled')
    E) Toggle Echo Mode (currently 'disabled')
    F) Flash (Toggle PTT and Tone output several times)
    G) Toggle PL Filter (currently 'disabled')
    H) Toggle PTT mode (currently 'ground')
    I) Change Carrier From (currently 'usbinvert')
    J) Change CTCSS From (currently 'usbinvert')
    K) Change RX On Delay (currently '20')
    L) Change TX Off Delay (currently '0')
    P) Print Current Parameter Values
    R) View Rx Audio Statistics
    S) Swap Current USB device with another USB device
    T) Toggle Transmit Test Tone/Keying (currently 'disabled')
    V) View COS, CTCSS and PTT Status
    W) Write (Save) Current Parameter Values
  5. Exit Menu

The "PL Filter" is disabled because I'm using 1200 bd so post the processed audio and corresponding pin on the 6-pin mini-DIN connector should be what's in use. I suppose I could bring everything back to the shack and put a 'scope on the pin and confirm that the audio is appearing there. I know audio is heard from the radio's speaker.

I'm missing something and since this is the first time I've ever tried this remote node hack, I thought I'd ask all of you where I might try next.

Thank you for any assistance you might offer. Stay well and keep circling the sun; 'cause life is beautiful.

73 de K3FZT / Steve

********** AllStarLink [ASL] Version Info **********

OS : Debian GNU/Linux 12 (bookworm)
OS Kernel : 6.12.25+rpt-rpi-v8

Asterisk : 22.4.1+asl3-3.5.2-1.deb12
ASL [app_rpt] : 3.5.2

Installed ASL packages :

Package Version
============================== ==============================
allmon3 1.4.3-1.deb12
asl3 3.8-1.deb
asl3-asterisk 2:22.4.1+asl3-3.5.2-1.deb12
asl3-asterisk-config 2:22.4.1+asl3-3.5.2-1.deb12
asl3-asterisk-modules 2:22.4.1+asl3-3.5.2-1.deb12
asl3-menu 1.14-1.deb12
asl3-pi-appliance 1.10.0-1.deb12
asl3-update-nodelist 1.5.1-1.deb12
cockpit 287.1-0+deb12u3
cockpit-bridge 287.1-0+deb12u3
cockpit-networkmanager 287.1-0+deb12u3
cockpit-packagekit 287.1-0+deb12u3
cockpit-sosreport 287.1-0+deb12u3
cockpit-storaged 287.1-0+deb12u3
cockpit-system 287.1-0+deb12u3
cockpit-wifimanager 1.1.1-1.deb12
cockpit-ws 287.1-0+deb12u3
dahdi 1:3.1.0-2
dahdi-dkms 1:3.4.0-6+asl
dahdi-linux 1:3.4.0-6+asl

This looks pretty much the same as the link I am runniing here, but I have CTCSS From set to "no" since I don't have that output from my radio to my interface. Since the DINAH doesn't seem to support that input, I'd try setting CTCSS From to "no" first.

1 Like

Try disabling CTCSS. It's very unlikely that the Kenwood is sending you both COS/COR and CTCSS DET. It's likely a combined state.

1 Like

The pin on the CM119A used for CTCSS input on the Masters interfaces is left open and floating on the DINAH, so yep, COS from it is a combined state.

Can't speak to your audio issues but we've used cellular modems at remote sites for years. I've been able to find prepaid SIMs for as little as $7 a month for data.

That holy war has already been waged here.

I'd love to know about that. Please share. Go direct if you prefer to
k3fzt-at-sjdmd-dot-com

73 de K3FZT / Steve

CTCSS set to no and no change so far as audio coming back to a connected node.:slightly_frowning_face:Thank you for that link. Illuminating. I use Ubiquiti here, including a UBB to get internet up to my barn where my single purpose stations are, including this planned Allstar/Echolink node if it ever happens. I have to ask club people if they know a member with line-of-sight to the repeater location.

73 de K3FZT / Steve

So, to be clear:

  • You're transmitting from something else into the TM-271A
  • The TM-271A is set on some frequency with CTCSS send and receive set
  • You've modified the TM-271A to tap some sort of "there's a valid signal here" analog line
    • You expect that this line is pulled to ground when a valid signal is received/decoded
    • Your Pi, DINAH, and TM-271A all have a common ground

If so:

  • With a multimeter, can you observe the line floating with no signal (floating being something higher than ~ 0.7VDC)
  • With a multimeter, can you observe the line pulled to ground when the 271A receives a valid, decodable signal?
  • If those are both true, from the tune menu above, with V can you see the COS go active when there is a valid, decodable signal?

If that was directed at me, loads of cheap 4G modems on ebay; then search data-only MVNOs. I think the last one I used was Mobile-X. I could run a mildly busy repeater on 2GB/mo...YMMV....

Thank you. I’ll pull it back to my shack sometime tomorrow afternoon and follow your guide. Thank you.

Steve