P25 Web Links
This page contains miscellaneous information related mainly to P25 communications. Several Dayton, Ohio area hams are interested constructing a local area P25 communications system. The information collected below is intended to assist with technical issues we may encounter. Feel free to read and browse the links and learn with us.
P25 Training Guide
http://www.dvsinc.com/papers/p25_training_guide.pdf P25 Training Guide by DVSI
https://cdn.codancomms.com/general-downloads/Products/User-Guides/Codan_TG-001-4-0-0-P25-Training-Guide.pdf P25 Training Guide by CODAN Communications
https://cdn.codancomms.com/general-downloads/Products/User-Guides/Codan_TG-002-3-0-0-Radio-Repeater-System.pdf Radio Repeater System Guide by CODAN Communications
P-25NX Project
Source for the P25NX repeater linking project
https://github.com/p25nx/pnx-mono
Implementation of the APCO Project 25 protocol over IP and IP-encapsulated HDLC transports
https://github.com/jaamison/p25netjs
P25 Network Exchange from the DCC by HamRadioNow on YouTube
V.24 transport over Ethernet
http://batboard.batlabs.com/viewtopic.php?t=109314
Open Source V.24 Board
http://p25.io/quantar-v-24-interface-board/
Miscellaneous network notes and diagrams
https://www.cs.indiana.edu/usr/local/www/classes/a247/misc.html
HDLC: A Technical Review
http://vkalra.tripod.com/hdlc.html
CISCO Configuring and Troubleshooting Serial Tunneling (STUN)
https://www.cisco.com/c/en/us/support/docs/ip/serial-tunnel-stun/16398-50.html
AllStar and P25 on Quantar
http://wiki.w9cr.net/index.php/Allstar_and_P25_on_Quantar
Midwest Quantar Bridge
Midwest Project links:
http://v24bridge.net/V24-Decoded-Data-to-Share.pdf
Hardware list:
The hardware used in this project consists of:
Motorola Quantar/Quantro for frequencies of interest (VHF/UHF/800) - (receiver and/or transmitter site)
Motorola OEM or aftermarket V.24 card, set for EXTERNAL Clocking
Motorola AstroTAC receiver unit for frequencies of interest (receive-only site and V.24 built-in already)
Cisco router capable of running Advanced Enterprise IOS (we use 1841 or 2651XM surplus units with 12.4 IOS)
Cisco WIC-1T Serial Interface Module installed in router selected
Cisco CAB-232FC DB-60 to DB-25 female cable - for WIC-1T (optionally you can use other multiple Serial port cards with matching cables)
Homemade CAT-5 to DB-25 male cable to connect Motorola gear to the Cisco gear (see diagram provided)
WireShark Simple Quantar Decoder:
P25 Manufacturer’s ID (MFID)
The Header Code Word and Link Control Word (LDU1) contain the 8 bit MFID field. When the manufacturer uses non-standard (data only) features, the MFID is asserted. When all of the other information fields conform to the Common Air Interface definitions, the MFID has a standard value of $00 or $01. A P25 radio must, as a minimum, transmit or receive messages using the the standard values for the MFID field. As a minimum, a P25 receiver will ignore messages which do not contain the standard values for the MFID field. Every manufacturer is assigned an MFID that can be used for proprietary signaling. Non-standard data from one manufacturer may not pass through another manufacturers repeater system.
The MFID’s that have been assigned are:
$10 Relm / BK Radio
$20 Cycomm
$28 Efratom Time and Frequency Products, Inc
$30 Com-Net Ericsson
$38 Datron
$40 Icom
$48 Garmin
$50 GTE
$55 IFR Systems
$60 GEC-Marconi
$68 Kenwood Communications
$70 Glenayre Electronics
$74 Japan Radio Co.
$78 Kokusai
$7C Maxon
$80 Midland
$86 Daniels Electronics Ltd.
$90 Motorola
$A0 Thales
$A4 M/A-COM
$B0 Raytheon
$C0 SEA
$C8 Securicor
$D0 ADI
$D8 Tait Electronics
$E0 Teletec
$F0 Transcrypt International
USA P25 Reflector Dashboard PCS002
Open USA P25 Reflector Dashboard in new tab
N1AJW P25 Reflector TG 31648 Dashboard
http://p25.alecwasserman.com/p25reflector/
P25 Talkgroups / Reflectors Dashboard List
From: http://vk4tux.duckdns.org:82/info.html/ and http://mrickey.com/2018/03/p25-talkgroups-reflectors/
MMDVM
MMDVM Digital Repeater Block Diagram
G4KLX/P25Clients for MMDVM
https://github.com/g4klx/P25Clients
MMDVM with processor on board by Wojciech Krutnik
using the concept of SQ6POG, Paweł Gomulka
https://github.com/wojciechk8/MMDVM_pog
INADDVM from INAD Communications by Kevin Custer W3KKC
http://www.inadvm.com/inadvm/inadvm-rev2-index.html
MMDVM P25 Hosts
P25 TG Number Description
TG 10100 World Wide, 1010x
TG 10200 North America, 1020x
TG 10201 North America TAC1
TG 10300 Europe, 1030x
TG 10301 Europe TAC1
TG 10400 Pacific, 1040x
TG 10401 Pacific TAC1
TG 10402 pacific TAC2
TG 10403 pacific TAC3
TG 28299 America-Ragchew, 28299
TG 31010 Alabama Link
TG 31171 Illinois Link
TG 31665 31665 P25-DMR Gateway
TG 31672 31672 P25 Pi-Star chat
TG 50525 50525 Bridge to YSF, NXDN and DMR
TG 9999 Disconnect
# /usr/local/etc/P25Hosts.txt
#
# The format of this file is the number of the Talk Group followed by the host name or address and port
#
# World Wide, 1010x
10100 85.119.82.151 41000
# North America, 1020x
10200 dvswitch.org 41000
10201 dvswitch.org 41010
# Europe, 1030x
10300 176.9.1.168 41000
10301 ea5gvk.duckdns.org 41000
# Pacific, 1040x
10400 pacificp25.repeaters.info 41000
10401 pacifictac1.repeaters.info 41010
10402 47.104.177.248 41000
10403 120.234.41.144 41000
# America-Ragchew, 28299
28299 65.101.7.51 41000
# Alabama Link
31010 p25.alabamalink.info 41000
# 31171 Illinois Link
31171 74.208.235.115 41000
# 31665 P25-DMR Gateway
31665 74.91.127.166 41000
# 31672 P25 Pi-Star chat
31672 w1msg.trianglenc.net 41000
# 50525 Bridge to YSF, NXDN and DMR
50525 50525.p25dvm.com 41000
Micro-Node International TEENSY Multi-Mode Digital Voice Modem
TEENSY MMDVM Product Page
TEENSY MMDVM User's Manual
http://micro-node.com/teensy_user.pdf
Repeater Builder STM32_DVM
STM32 DVM Page
http://www.repeater-builder.com/products/stm32-dvm.html
STM32 DVM FAQ
http://www.repeater-builder.com/products/stm32-dvm-faq.html
STM32 DVM Board Layout and Schematic
http://www.repeater-builder.com/products/pdfs/STM32_DVM_v3.pdf
STM32-DVM to Mini-DIN and Motorola 16pin ACCY
http://www.repeater-builder.com/products/pdfs/Mot_Maxtrac_and_mini-DIN.pdf
Updating STM32 DVM Firmware
https://github.com/N4IRS/MMDVM-Install/tree/master/STM32-DVM
STM32 DVM Firmware Files
http://dvswitch.org/files/HAM/MMDVM/
Connecting an SSD1306 OLED Display (optional)
https://www.f5uii.net/en/installation-oled-display-ssd1306-raspberry-pi-mmdvm-mmdvmhost/
How-to-build or modify your Nextion® Screens for MMDVMHost
https://www.hamdigitaal.nl/download/algemene-informatie/NEXTION_Tutorial_v2.03.pdf
STM32 DVM Receive Audio Setup
STM32 DVM Transmit Audio Setup
ZumSpot (Also see Pi-Star section)
Designed by Jim Mclaughlin, KI6ZUM, with firmware by Andy, CA6JAU (GitHub: juribeparada / MMDVM_HS ), based on the MMDVM software by Jonathan Naylor, G4KLX (GitHub: g4klx / MMDVM ).
ZUMspot/Pi-Star Bring-up and initialization by David Hull, KC6N
Document is updated for Pi-Star v3.4.15
http://papasys.com/dmr/resources/DATA/docs/ZumSpot_Pistar_KC6N_20180607.pdf
ZumSpot and MMDVM Demo Page by VE1CRA
http://ve1cra.net/main/zum.html
ZumSpot Firmware Releases (For other platform HW too)
https://github.com/juribeparada/MMDVM_HS/releases
Pi-Star
http://www.pistar.uk/index.php
Pi-Star Downloads
http://www.pistar.uk/downloads/
W1MSG Pi-Star Installation Videos on YouTube
https://www.youtube.com/channel/UCcjYjtognBaSAa-ZLk3EU2A
W1MSG Pi-Star P25 Host File Update on YouTube
Playing with Pi-Star by KE0FHS
https://www.toshen.com/ke0fhs/pi-star.htm
If you are running Pi-Star 3.x then upgrade to v4.1.0
Note: v4.1 has voice announcements for P25 Talk Groups.
RELEASE Pi-Star v4.1.0
Post by MW0MWZ » Thu Mar 26, 2020 1:37 pm
Pi-Star v4.1.0 is finally out of release candidate status and is now in release.
If you are running any of the release candidates, you can upgrade http://pi-star/admin/expert/upgrade.php to the release version.
So whats new - not much if you are upgrading from 4.1.0-RCx, the RC releases rolled us through some issues on Pi4 hardware and wifi, plus some issues with keeping the time updated, thankfully those are in the past!
Upgrading from 4.0.x - 4.0.x ran the rather shorter lived "Stretch" build of Raspbian, and "Buster" was released so quickly that it never made it to a prime time release. It will keep running, but it is strongly recommended to re-image your card and move up to 4.1.0 when you can. The main difference between 4.0 and 4.1 is the operating system, 4.1 runs the current "Buster" release.
Upgrading from 3.x to 4.1 - Pi-Star 4.1.x is still the Pi-Star software you know and love, it might not look much different on the outside, but here is where the similarities end. The underlaying "Wheezy" OS in Pi-Star 3.x is on life-support, updates are already vanishing from the repos and you should upgrade to 4.1.x to make sure that your Pi is going to be up to date and keep receiving updates.
Version 3.x is no longer receiving updated binaries for the radio related software, so new features will only be available in 4.1.x and beyond.
Changes from 3.x to 4.1.x relate mostly to the radio softwares as these are keeping pace with the code released by Jonathan (G4KLX), Andy (CA6JAU) and the long list of people who commit to their repositories (including me). In some cases when pushing changes to their repositories is not possible for some reason, or when we want to large-scale test a few feature - Pi-Star may get it first, but the code is always committed back to the source repo.
Should you upgrade to 4.1.x? - Simply put yes, this is where all of the updates are happening and its the only version running on the current "Buster" OS.
What if I don'r run on Raspberry Pi hardware? - We're working on updates for those images too.
Motorola® Quantar®
General Quantar Info from Motorola Electronic Catalog
http://www.repeater-builder.com/motorola/quantar/pdfs/quantar-general-information-from-ecat.pdf
Identification of a Motorola Quantar Modules
http://www.repeater-builder.com/motorola/quantar/quantar-id/quantar-article.html
Quantar® Exciter Repair
http://web.archive.org/web/20180901235321/http://p25.io/quantar-exciter-repair/
Quantar Onan Power Supply Repair
http://p25.io/quantar-onan-power-supply-repair/
Quantar® Interfacing
http://www.repeater-builder.com/motorola/quantar/q-interfacing/quantar-interfacing.html
Yaesu DR-1X P25 (Using STM32_DVM_PiHat Adapter) How-To
Duplexers
Theory and Testing of Duplexers by VE2AZX
http://www.repeater-builder.com/antenna/pdf/ve2azx-duplexer-info.pdf
Cleaning and refurbishing the Motorola T-1500 series UHF Cavity
by Cactus Inter-Tie System
http://www.cactus-intertie.org/LA/tec_not6.pdf
T-1500A Duplexer Manual
http://www.repeater-builder.com/motorola/t1500/t1500-6881102e96-g.pdf
T-1504A Duplexer Connection Diagram - High/Low Freq Connections
High Frequency side versus Low Frequency side - see diagrams in document below
Combiners
About Combiners by Decibel Products
http://www.repeater-builder.com/antenna/db/pdfs/db-about-combiners.pdf
DB Products DB4350 and DB4360 Low Loss Combiners Tuning
DB Products ACT27xxJ2 and DBNXTL27xx Transmitter Combiner Tuning
http://www.repeater-builder.com/antenna/db/pdfs/act27+dbnxtl27-combiners.pdf
DB Products DB4379 Low Loss Combiner Tuning
http://www.repeater-builder.com/antenna/db/pdfs/db-4379-low-loss-combiner-tuning-instructions.pdf
Celwave 220 MHz Combiner
http://www.repeater-builder.com/antenna/pdf/celwave-220.pdf
The beer barrel as a VHF Cavity Resonator
http://www.repeater-builder.com/antenna/pdf/beer-barel-cavity.pdf
A Strategy for Adding a Digipeater to a VHF Repeater
http://www.repeater-builder.com/projects/pdfs/kh6cq-ham-tip-19.pdf
Transmitter Multiplexing using Motorola T-1500 Series Cavities
http://www.repeater-builder.com/motorola/t1500/t1500-cavity-app-notes.pdf
NXDN
Get an NXDN ID
MMDVM NXDN Reflectors
Ham Radio 2.0: Episode 142 - RadioID.Net Updates with VE9GLN
Explanation of how DMR IDs will be assigned and the new account based system which provides instantaneous DMR ID updates
DMR ID Last Heard and database info except Europe:
P25 Net Thursday Night 8pm Central on P25 TG 31171
From: James Riley
July 4 at 10:43 AM
Joins us each Thursday night at 8 pm central for the Illinois digital net on Illinois Link Wires-X room 21565, Brandmeister DMR 31171, P25 31171 NXDN 31171 and YSF Reflector Us Illinois Link. If you need the IP address for the P25 and NXDN talkgroup email me at kb9tzq@gmail.com also join us on Facebook.
https://www.facebook.com/groups/134653443864572/
Adding Illinois Link P25 and NXDN to Pi-Star
Here is how to add the NXDN and p25 Talkgroups to Pi-Star
View this YouTube to find the best way to add a talkgroup to Pi-Star: https://youtu.be/jFXEmDwW8fo
P25 is 31171 IP 74.208.235.115 41000
NXDN is 31171 IP 74.208.235.115 41400
Both should be linked to DMR and YSF
From Pi-Star Config/Expert/SSH, set rpi-rw, then edit the 2 host files with these commands: "sudo nano /root/P25Hosts.txt" and sudo nano /root/NXDNHosts.txt". The format should be room number, IP address, port number. Save and do a "update" command from Admin or Config page and you should see your rooms added to the drop down lists.
Dashboard for Illinois Link P25 is at http://74.208.235.115/P25Reflector-Dashboard/
Access to DVSwitch forum on Groups.IO
Group Description: The *official* place to go for discussion/support for DMRlink, HBlink, DVSwitch, Quantar Bridge (Note: Log-in to Groups.IO first)
Weblink to DVSwitch top level
https://dvswitch.groups.io/g/main
Weblink to Quantar Bridge Sub Group
https://dvswitch.groups.io/g/Quantar-Bridge
Weblink to Quantar Bridge Files section; includes Cisco router and Astrotac Comparator 3000 code
https://dvswitch.groups.io/g/Quantar-Bridge/files
Digispark ATTINY85 Installation in Arduino IDE
Youtube Video on Digispark ATTINY85 Install
Digistump Wiki
https://digistump.com/wiki/digispark/tutorials/connecting
Keywords: APCO APCO25 P25 P-25 Quantar MMDVM V.24 V24 HDLC Zumspot Pi-Star Combiner Duplexer DMRId DVSwitch