The KD5LWU New Repeater Announcement

A Duplexed IP Repeater System <IP-RS>

AllStar Link NODE # 29317

EchoLink NODE 24336


5.18.2015 The NEW repeater pair is now up and running at 30 watts output...146.790/146.190 127.3...and running allstar Node 40722 plus Node 29317. I also have a cross band 147.915 repeater to 6 Meter and 10 Meter for local use No Allstar or Echolink.

5.2.2014 – In order to go duplex with Allstar I need to go offset with the repeater so I ordered two Motorola Maxtrac radio's to make a repeater pair that will be set to 146.790/146.190 with a 127.3 pl as before then we will go duplex with Allstar and you will be able to talk like on the phone (talk and hear at the same time)....The radio's came today. I am waiting for the new programming rib box and the Motorola software....also waiting for the new Allstar cable for Allstar to Motorola. Once I have all the pieces then it will be smooth sailing to put it together and duplex it in the allstar software. Will keep you informed....Johnny

Note 5-6-14 – now Have rib box to program Maxtrac's waiting still for Allstar cable, etc

Note 5-7-14 - added a Courtesy tone (single deep tone beep if not connected to a node and two high tone beeps if connected to one or more nodes)...upgraded to latest SVN version...repaired bad IP address and generated configuration download...restarted system and running well still on simplex 146.790 until rest of new system arrives.

Basic System Description

The New KD5LWU Repeater is a telecommunications Internet protocol (IP) repeater system permitting (eventually when full configuration is complete) the simultaneous transmission of two voice transmissions in opposite directions over one channel (Duplexed – like a telephone).The new KD5LWU Repeater is a multi-Frequency and multi-geographic Receive and Transmit Repeater system.

The system is powered by two large solar cells supplying controlled recharging ability to dual 980 amp hour 12 volt deep cycle batteries. The IP capable repeater system continues to cover the same radius of communication distance as our original ham radio standard repeater but with 1/8th the power consumption of the old system. Because the IP-RS repeater is a single channel unit there is no longer a need for multiple duplexer's to deal with the 600 and 500 MHz split on the two repeaters originally on the air.

With our new open IP Repeater System <IP-RS> you may connect using your Smart Phone, through a web page or locally with your radio (Base or Mobile) making the system a pleasurable experience for chit-chat but also a powerful tool for emergency communications . The new system does not require a PL and the input and output frequency is a single channel set to 146.790 <This is temporary> There are no carrier hang time which makes communication quick and quiet without waiting on the distractions of RF filled timing beeps, pauses and bloops. Remember no frequency offsets or PL tones needed for the present time and a very positive plus is the audio is 300 percent better than the old repeater!

There is a repeater CW ID that announces every 10 minutes the repeater's local presence on the frequency. You may find out what time it is locally by sending a DTMF *81 but remember that it will be heard by whoever else is also connected World wide and will be a problem to other users if not timed correctly in it's use. Please wait to be sure no one is using the system before sending a *81

The new system has both *Allstar Link and *Echolink active 24/7 and has nodes connected to many areas of the U.S.A. The system is running 50 Watts on Output on 146.79 no offset, no PL Receive has an amplifier on it. The old repeater has a problem with the Arcom RC-210 controller. I will repair it and upgrade the whole old repeater system and have it ready to put on line in case of emergency should we for some reason lose the IP capability of the Internet. In the coming days I will put up a web page showing what nodes are active on the repeater so you'll know who is linked up to us at any given time. I hope you will use the repeater during the day and weekends as it would be a shame to do all this hard work just to have the repeater sit here in is meant to be used and is an open repeater to all users.

Enjoy Johnny Shepherd KD5LWU kd5lwu at

I am working on supplying more information on the following areas:

Instructions on local use

Web Page Use -

AllStarLink -

All Star Explained

Getting Started with AllStar Link Network

In order to become a member of the AllStar Link Network, you must first Register to become user of this Portal system. To qualify for membership, you must be a holder of a valid Amateur Radio license.

There are basically two types of users.

One is a standard user, who is a user of one or more Allstar Link systems, and has access to connect to systems via the WebTransceiver (from this Portal) or the Telephone Portal, in addition to accessing the systems via the radio.

The other is a 'system operator'. This type of user runs and/or maintains one or more AllStar Link radio systems (nodes) and has access to administrate them via this Portal.

When you first register to become a new user, you enter in the required information, and then a verification e-mail is sent to your specified e-mail address that includes a link to click on that allows us to verify the validity of your e-mail address. Afterward, a member of our staff will verify the validity of your Amateur Radio license, and will validate your information and enable you to use our system. When validated, you will receive an email accordingly.

After validation, if you are a standard user, then you're done. You can go ahead and enjoy the use of the facilities of this Portal and all the Allstar Link Network has to offer.

Connecting to us by Cell Phone (AllStar)

Go to if you are already registered at top of page click on tab that states Webtransciever and look for node 29317 click on it and it will connect to us

Telephone Portal (including public SIP access)

The telephone portal allows users of the AllStar Link Network access via telephone to talk on, use, and control participating Nodes on the network. In addition, if desired, it gives users (or non-users as configured) access to "Reverse Autopatch" functionality on a Node. The telephone numbers of the AllStar Link Telephone Portal are as follows:


+1 763 2300000



United States



+1 559 2557827



United States (Alternate # for the time being)



+61 2 91916355






+43 720 3084388






+33 170 906577






+49 821 9078368






+64 9 9250480



New Zealand



+34 956 922108






+44 141 8880362



United Kingdom


First you dial the number for the Telephone Portal (see above). It will ask you to enter the desired Node number to which you wish to connect, followed by the pound sign. Please do so. If both Node access and Reverse autopatch access is enabled for the specifyed node, the system will prompt you to enter 1 for Node access, or 2 for Reverse Autopatch access. If only one of these is enabled it will go directly to the processing for that type of access.

Connecting to us by Cell Phone (EchoLink)

For Smart Phones android and Iphone there is a program (free) in the store on your phone. Do a search for Echolink app and download – run - configure - then connect to node 24336. However you will have better audio using your cell phone to connect to our 29317 node!

Connecting to us VIA Web Page

Explanation coming soon....

DTMF Function List

Allstar Link Node 29317 -- KD5LWU -- kd5lwu, Cortez, Colorado, United States

Please be respectful and careful when using these tones. Please DO NOT USE those tones that are in RED unless directed to do so by KD5LWU








  Link Disconnect









  Link Connect (Monitor Only)









  Link Connect









  Remote Comand









  Link Status









  Disconnect All Links









  Last Node To Key









  Full Link Status









  Reconnect Links









  DTMF Shortcuts









  Link Connect (Local Monitor Only)









  System Info


















  App_rpt Version









  Phone PTT



To connect to another Allstar node, use the Link Connect (*3) plus the node number. For example, to connect to node 29317, use *329317. To Disconnect from a node, use the Link Disconnect (*1) plus the node number.

Seeing Who is on our system

Sample of link status

About AllStar Link Network

The AllStar Link network consists of a number of large (and small) individuals and groups who wish to provide efficient large-area communications to the Amateur Radio public in their respective local areas. This is done by providing a local VHF or UHF repeater system controlled by a Linux-based computer system running the open-source Asterisk PBX telephone switch platform along with the app_rpt repeater/remote base controller/linking software module (which is included in the distribution of Asterisk) connected to a high speed (broadband, such as Cable Modem or DSL) Internet connection.

The computer system running Linux/Asterisk PBX coupled with the app_rpt module makes a powerful repeater/remote base controller capable of controlling many (like up to hundreds, theoretically) repeaters and/or remote bases per computer system. It provides linking of these repeater and remote base "nodes", with "nodes" on other systems of similar construction anywhere in the world, over the Internet via its IAX2 Voice Over IP protocol. It also, of course, provides for an Autopatch (public switched telephone network access over the radio) on each node (Asterisk is a phone switch after all J), if desired. For detailed information on system requirements and configurations see the app_rpt documentation.

AllStar Link is an organization devoted to the proliferation of this technology, and to organize its public use. Certainly, anyone can have a "private" system using this technology, and they would have no need for AllStar Link affiliation, but there needs to be a single, central point of organization for public use of this technology, and that's what AllStar Link provides.

To qualify for AllStar Link affiliation, your repeater system must be either open (meaning that any licensed Amateur Radio station is welcome to fully use all of its functionality at any time), or at least semi-open (meaning that for permanent use, the owner of the system may require membership for use of all or part of its functionality, but non-members, particularly those visiting the area may use it on a temporary, short-term basis only). Some functions may be limited or un-available, but functions that allow for linking over the AllStar Link must be available to non-members at any time, and the system must be able to accept linking from any AllStar Link node. The DTMF control codes used for controlling linking and other AllStar Link-wide functions will be consistent among all nodes. Systems are welcome and encouraged to have other parts (such as other private nodes or remote bases, etc) of their radio systems not affiliated with AllStar Link. Our node numbering scheme (use the "List All Nodes" button above) was designed specifically with this in mind.

Our technology has the unique characteristic that repeaters and remote base nodes are completely separate from each other, unlike any other repeater/remote-base controllers. That means that just because a remote-base is at the same site or even on the same computer system as a repeater, they are not tied together in any way. They are implemented as completely separate nodes, usable separately.

Unlike other Radio-centric VOIP technologies, such as Echolink or IRLP, etc, Allstar and the app_rpt/Asterisk technology have been specifically designed to be part of, and to link together parts of the very infrastructure of the radio systems that it implements, as opposed to be an end-to-end protocol like others.

All systems (nodes) are either repeater controllers or remote-base controllers. They connect directly with the radio hardware (thus replacing/outdating) current controllers on a system that is already up and operating. Just simply as a repeater controller, the amount of functionality and flexibility is very impressive, and when you also consider its remote base, linking (full-duplex) and VOIP (for autopatch, remote control, etc) capabilities, its amazing.

Allstar Link is an attempt to take this technology and make it available and applicable to as many Amateur Radio operators as possible, via their local repeater systems. For the most part we try to keep administration and policy making up to local systems. We only require strict technical standards (we dont want a bad sounding or un-usable system), and minimum operational requirements, most of which have to do with making the systems available to all, and making sure that everyone gets along, and treats everyone with proper respect and dignity.


Once again, this technology is not intended to be implemented by the end-user or those light at heart. It takes serious committment and resources (that which is required to put a radio system on the air to begin with, and to maintain it) by either a group, club, or maybe even a single, dedicated, talented (not to mention monied) individual. The assumption made with Allstar Link is that the purpose of this work and level of dedication is to share the goodness and great benefits with others, and to promote continuation of doing so.

Purpose Of This Portal

The purpose of this Portal is to provide both users and System operators/Providers of the AllStar Link Network, a method to access, connect to, use, and interact with all participating AllStar Link Nodes via the Web Browser running on their desktop computer, or by the telephone (see the Support page for information on the Telephone Portal), and in addition, be able to provide a simple, clear and concise methodology by which a System operator may specify and enter the desired configuration of their system(s), and be able to apply these configurations to their systems, using a Graphical User Interface also from their Web Browser.

Node Types

When you sign up for a node, you will have the option of checking some check boxes which identify the type of node you are putting up. Note: It is very important to supply a working email address where you can be reached! I have had to cancel several node number requests because of non-working email addresses!! We will be changing the software to automatically validate email addresses on node number requests in the future.


This is a full duplex node which is able to be controlled with DTMF commands. Repeater nodes may or may not have emergency power or extended coverage. Offset (+/-) and CTCSS tone should be supplied during the signup process. Latitude and Longitude in degrees/minutes/seconds format should be supplied.

Simplex Node

This is a half-duplex node which is able to be controlled with DTMF commands. Simplex nodes may or may not have emergency power or extended coverage. A CTCSS tone should be supplied during the signup process if one is required. Latitude and Longitude in degrees/minutes/seconds format is optional.

Remote Base Node (currently not configurable directly by this Portal)

This is a half-duplex node which is for initating outbound radio connections only. A remote base node will not decode DTMF and act on any commands from the RF side. This type of node should only have the remote base, and perhaps the frequency-agile checkbox(es) checked; none of the other boxes make much sense. This node type is typically used to implement a frequency-agile VHF/UHF/HF remote base.

Hub Node

This is a node which has no Radio hardware associated with it whatsoever. This node type is typically used in a location where there is a large amount of Internet Bandwith available in addition to a computer system with a good amount of CPU power, and is used as a "central connecting po


CentOS is the Linux software the the IP-RS system uses for carrying the Voice (Asterisks) and for the Radio Controller (APT_RPT) all operations and control are run strickly from the command line within CentOS. The system is very secure and is sldom hacked and is nearly impenetrable by virus programs See More Information

Asterisk PBX

Asterisk/app_rpt project -- Lots of good documenttion on the Asterisk app_rpt application

Here is the Interface I am using

DMK Engineering (manufacturer of URI) -- USB Radio Interface Device

DMK Engineering Inc. 28503 Lomo Drive Rancho Palos

Verdes California 90275-3137

Tel: 310.544.1222 Fax: 310.693.0753

URI USB Radio Interface Features

Easy radio connections High quality audio

CM108 audio controller

Low cost


2 inputs + 3 GPIO

+6dB gain op-amp

Full RF filtering Description

URI allows a standard land or mobile FM radio to be connected to a host computer via USB interface. Potential radios include amateur, business, public service/safety, GMRS, citizens band, and many others. The host computer requires appropriate software to drive the device such as app_rpt with chan_usbradio. These applications currently run under

Asterisk/Linux. URI may be used for remote radio control or can link two or more radios in repeater mode.Audio can be passed throughVOIP/Ethernet.

Many radios provide an interface connector for external access. These signals can be easily connected to the URI’s standard DB-25 connector.

The URI contains the C-Media CM108, a high-quality full-duplex USB audio controller. One channel of receive audio is provided along with

two channels of transmit audio. Even radios that have separate voice and CTCSS signals may be supported. Optionally, the second audio channel may be used as a line monitor. URI has dedicated input pins for CTCSS and COR, and an output pin for PTT. There are three general purpose I/O pins that may be controlled by software. Each audio output channel is fed through a 3-pole low pass filter with a 4KHz cutoff frequency. These filters may be bypassed, if desired, by setting internal jumpers. The filter outputs may be either DC coupled or connected through 10μF non-polarized

capacitors. This allows low-frequency CTCSS signals to be passed unattenuated when driving a low impedance input.If the radio requires high input drive levels, an on-board 6dB gain amplifier is provided. An

external 12 volt DC power source is needed to power this amplifier, i

f needed. If this gain is not needed, no external power is required. If desired, a 1K-bit 93C46 serial EEPROM may be used to store radi

o-specific configuration data. Internally, the URI circuit board provides space for a surface-mount version of this part, but this is normally not installed. Instead, the EEPROM interface signals are brought out to the

DB-25 connector in such a manner that a DIP part may easily be sol

dered directly to the pins. This way if the URI device is changed, the stored configuration data will remain with the cable attached to the radio.

Table 1. Connector Pin Assignments

Pin No.Name Description

1 PTT Push to talk, open collector output to radio transmitter

2 GPIO1 General purpose input or output

3 GPIO2 General purpose input or output

4 GPIO4 General purpose input or output

5 MUTE_REC Unused input

6 MUTE_PLAY Unused input

7 CTCSS_DET Input, diode isolated, continuous tone-coded squelch system detect

8 COR_DET Input, diode isolated, receive (carrier operated relay) detect

9 MIC_IN Direct low-level audio input to CM108, must be AC coupled

10 LEFT_OUT DC coupled left audio output, 4KHz bandwidth

11 RIGHT_OUT DC coupled right audio output, 4KHz bandwidth

12 AOUT AC coupled output from 6dB gain amplifier

13 GND Ground

14 +5V 5 volts DC power output from USB bus

15 EEP_CS EEPROM chip select control

16 EEP_CK EEPROM serial clock

17 EEP_DI EEPROM data input

18 EEP_DO EEPROM data output

19 GND Ground

20 GND Ground

21 MIC_AC Audio input, line level, AC coupled

22 LEFT_AC AC coupled left audio output, 4KHz bandwidth

23 RIGHT_AC AC coupled right audio output, 4KHz bandwidth

24 AIN AC coupled input to 6dB gain amplifier

25 AVDD 12 volt DC power input required for 6dB gain amplifier


USB hubs are not recommended. However, if a hub must be used, make sure i

t is rated at USB


High Speed

. Some hubs are USB 2.0 compliant but are rated only at Full Speed

(12Mbps) not High Speed (480Mbps). Do not connect any USB 1.x devices to either the same external hub or to the host computer’s internal root hub. The URI radio interface connector is a standard female 25-pin D-shell. The recommended mating connector is the Amphenol G17S2510110EU or equivalent. This connector is available from both Digi-Key and Mouser Electronics.

Application Information

Audio I/O.In most applications audio inputs and outputs should be AC coupled. Large value non-polarized capacitors are provided on-board to pass low frequency CTCSS signals. The DC coupled signals are provided for use in some applications. The CM108 audio controller chip biases these signals at half-supply, typically 2.5 volts. The MIC_AC input in addition to providing AC coupling also has an 18dB attenuator. This brings line level signals down to the low-level microphone level signals required for the CM108. LEDs.The URI has two LEDs, one on either side of the USB connector. The green LED on the left is on when the URI is powered from the USB bus. When the app_rpt application is running this LED flashes. The red LED is on when the PTT signal is active. 6dB Gain Amplifier.

An on-board 6dB gain amplifier is provided for radios that need more

than the 1.7 volt rms maximum signal available from the standard outputs

. To use this amplifier, an external 12 volt power source must be connected between pins 25 and 13. The op-amp is the National Semiconductor LMC7101. This amplifier features very low nois

e and distortion, high speed, rail-to-rail inputs and outputs. Absolute maximum supply voltage is 16 volts. An external jumper must be installed from either pin 10 (left) or pin 11 (right) to the amplifiers input on pin 24. Since the amplifier’s input is AC coupled, the AC coupled outputs

are not required. The audio output is then taken from pin 12



Echolink Explained



EchoLink opens a world of new communications possibilities by joining Amateur Radio stations over the Internet. Since the Internet is a shared, public resource, security is naturally a very important part of the system.


Each new user of EchoLink must provide proof of license before access is granted.  This is to ensure that only licensed Amateurs have access to the system, and to ensure that each user is using a valid callsign that he or she is authorized to use.


There are several different ways you can provide proof of license.  These options vary somewhat by country. The various options will be explained on the pages that follow.


First, please be sure that you have downloaded, installed, and run the EchoLink software. This registers your callsign with the system. Then, please enter your callsign below, and click Continue.

EchoLink® software allows licensed Amateur Radio stations to communicate with one another over the Internet, using streaming-audio technology.  The program allows worldwide connections to be made between stations, or from computer to station, greatly enhancing Amateur Radio's communications capabilities.  There are more than 200,000 validated users worldwide — in 151 of the world's 193 nations — with about 5,200 online at any given time.

The program runs on Microsoft Windows®.  It is offered free of charge and may be downloaded

EchoLink is a full-featured software package with many important and useful features.  For a brief overview, take a tour !

For more information about Internet linking programs such as EchoLink, see QST for February, 2003, page 44, or download the PDF from the ARRL Web site.

Status Page and more.....

- Working on page to tell Node Status, etc


Repeater do and do not

Try to wait for a audio pause in conversation before disconnecting a link

Announce yourself when frequency is clear after you connect but be sure frequency is not in use


Echolink and *Allstar Link are Internet Trademarks


Last Edited – 4.13.2014 by KD5LWU