K8JTK Hub: Digital VoIP Muti-Mode Interlink System

The K8JTK Hub is a Ham Radio Digital Voice over IP Multi-Mode Interlinked System (DVMIS).  It was created to interlink ham radio VoIP modes: AllStar Link, EchoLink, DMR, D-STAR, and Yaesu System Fusion.

This system is hosted in a Digital Ocean data center (NY3) near Clifton, NJ.

Utilizing AllStar Link (built on Asterisk) at its core provides linking flexibility.  Transcoding between digital and analog via DVSwitch.

This system is available to use but should be considered in a testing phase for configuration optimization, namely D-STAR and audio levels between modes.


Please remember to:

  • follow all rules of your regulatory authority
  • identify your station by voice.  ID in a data stream doesn’t count due to analog connections.
  • press PTT for at least 2 seconds before speaking in order to bring up all Internet links.  Fast-keying is NOT ALLOWED.

Accessing the Hub

  • AllStar Link: 50394
  • EchoLink: K8JTK-R 233196
    • 100 simultaneous connections
  • DMR: Brandmeister group call to 3139403
  • D-STAR: DCS/XLX983 module A (currently not functioning)
  • YSFReflector: K8JTK Hub
    • YSF DTMF: #17374
    • DMR2YSF: TG 17374
    • DMR2YSF via DMRGateway: TG 7017374

VoIP Systems

Systems and modes used to access the Hub.

AllStar Link: a ham radio linking system based on Asterisk.  This is an analog system for repeaters or portable nodes.  Implementations: AllStar Link and HamVoIP.  See my write-up on AllStar.

EchoLink: widely utilized Internet linking program.  Windows desktop application for users or nodes is dated and not actively maintained but still seems to work on later versions.  Linux users install QTel through the package manager.  Smartphone applications for Android and iOS.  Nodes or repeaters can be built using the Windows app, SVX Link, or AllStar/HamVoIP.

Digital modes: available on repeaters or personal hotspots using MultiMode Digital Voice Modem (MMDVM), OpenSpot or hardware supported by Pi-Star such as the ZUMSpot (search Ham Radio Outlet for ZUMspot or ZUM Radio).

Brandmeister: repeaters or hotspots linked to Brandmeister – direct or MMDVM.

D-STAR: repeaters or hotspots with access to DCS/XLX reflectors or MMDVM capability.

YSF/YSFReflector: see digital modes above.

Behind the Scenes

AllStar has the concept of private nodes which cannot be linked to publically.  They are used to manage links and systems such as individual repeaters, nodes, links, etc – they can be anything defined by the sysop.  They are four-digit numbers beginning with a 1, ie 1XXX.  My defined numbering scheme on The Hub:

100X = rooms or channels (1000-1005) available channels for linking two or more nodes (ie: AllStar & DMR, or Echolink, DMR, and YSFReflector)

12X1 = analog connections

1221 = Echolink

13X1 = digital connections

1311 = Brandmeister DMR

1321 = D-STAR XLX reflector

1351 = YSF/YSFReflector

What About Adding…??

D-STAR: work in progress

P25: will be added in time as I recently acquired a radio

NXDN: don’t have a radio to test this integration, yet

Wires-X: Wires-X is proprietary to Yaesu radios and repeaters, the goal is to have as much open-source as possible.  I do have a Wires-X room and it can be added upon request.  I do not have the resources to add a dedicated Wires-X connection at this time.  Contact for donations of a radio and/or hotspot for a dedicated connection.

IRLP: can be linked as requested.  IRLP nodes (that are not reflectors) only allow 1-to-1 linking.  Should this hub become regularly utilized, adding a reflector will be considered or if you can donate a channel on an existing reflector – contact me.

Landline/dial-in access: easy to do but can be expensive for idle connections, controlling access challenges

SIP phone/IAX phone/Zolpier/DVSwitch mobile: possible for a limited number of users

Everything else not listed: can it convert to and from Universal Software Radio Peripheral (USRP), Session Initiation Protocol (SIP), or Inter-Asterisk eXchange (IAX)?  If so, what’s involved setting up a connection or gaining access?

Ham radio and tech.