3. The Internet Radio Linking Project Presented by the KD4RAA Repeater Group Portions of this presentation are reproduced courtesy of VE3SY & VE7LTD www.kd4raa.net

4. Presentation Modes of Operation IRLP Node Status IRLP Operation How To IRLP Active nodes (maps) 146.775 on reflectors 441.725 point-to-point Raleigh IRLP Policy 2m open / 440 for supporting membership Use – things to remember IRLP QSO Demo Introduction - who we are KD4RAA-K4JDR Repeater Group and Link System Affiliated repeaters What is IRLP? Nodes vs. Reflectors Reflector Mode Point to Point Mode Inventor Technology - How it Works Node 426/427 configuration

5. First organized in 1994 Cooperative effort of NC and SC hams Not affiliated with any specific club Purpose: fostering good amateur radio practice, developing technical skills, repairing and maintaining repeater systems, exploring new technologies, and taking an active role in helping establish and maintain local, interstate, and international repeater network capabilities Individual ham radio operators bringing distinctive skills, resources and knowledge to facilitate other organized efforts and repeater projects Self-supporting though the generous donations and cooperation of area hams and non-hams The KD4RAA Repeater Group

6. Target Goal of KD4RAA-K4JDR Repeaters… HAVING FUN with Amateur Radio !

9. KD4RAA-K4JDR Supported Repeaters K4JDR 441.725 West Raleigh Hub (IRLP #427) KD4RAA 444.875 Raleigh Temp Site K4JDR 444.775 Cary NC4SU 146.775 Raleigh Fairgrounds (IRLP #426) W4ATC 442.675 NCSU, Raleigh (IRLP #741 temp) KA2FWC 443.625 Ericsson, RTP N4HAJ 444.575 Kinston (IRLP node #429) N4ZBB 444.675 RTP KB4PQA 443.125 Greenville, SC K4JDR 444.150 Clayton (soon) NE4J 444.650 Middlesex KB4WGA 444.925 Durham KB4WGA 444.375 Henderson- Kerr Lake K4OBX145.150 Buxton- Outer Banks KD4MJO 443.525 South Hill, VA N4JDW145.170 Wilmington, NC (IRLP node 748)

10. KD4RAA-K4JDR Linked as of April 2002 K4JDR 441.725 West Raleigh Hub (IRLP #427) KD4RAA 444.875 Raleigh Temp Site K4JDR 444.775 Cary NC4SU 146.775 Raleigh Fairgrounds (IRLP #426) W4ATC 442.675 NCSU, Raleigh KA2FWC 443.625 Ericsson, RTP N4HAJ 444.575 Kinston (IRLP #429) N4ZBB 444.675 RTP KB4PQA 443.125 Greenville, SC K4JDR 444.150 Clayton (soon) NE4J 444.650 Middlesex KB4WGA 444.925 Durham KB4WGA 444.375 Henderson- Kerr Lake K4OBX145.150 Buxton- Outer Banks KD4MJO 443.525 South Hill, VA N4JDW145.170 Wilmington, NC (IRLP node 748)

11. KD4RAA-K4JDR Proposed Linked K4JDR 441.725 West Raleigh Hub (IRLP #427) KD4RAA 444.875 Raleigh Temp Site K4JDR 444.775 Cary NC4SU 146.775 Raleigh Fairgrounds (IRLP #426) W4ATC 442.675 NCSU, Raleigh KA2FWC 443.625 Ericsson, RTP N4HAJ 444.575 Kinston (IRLP #429) N4ZBB 444.675 RTP KB4PQA 443.125 Greenville, SC K4JDR 444.150 Clayton (soon) NE4J 444.650 Middlesex KB4WGA 444.925 Durham KB4WGA 444.375 Henderson- Kerr Lake K4OBX145.150 Buxton- Outer Banks KD4MJO 443.525 South Hill, VA N4JDW145.170 Wilmington, NC (IRLP node 748)

12. New Repeater Henderson 444.375+ 100.0 PL KB4WGA Directional NorthEast

13. KD4RAA-K4JDR Supported Repeaters General Transmitter Location

14. What is I.R.L.P. ? IRLP stands for Internet Radio Linking Project, the brainchild of Dave Cameron VE7LTD of Vancouver BC. Dave was frustrated with the unreliable operation of the Windows based IPHONE and decided to build a system on a LINUX platform. Iphone and other systems use VOX where the IRLP digital concept reduces delays to almost nil thus many less missed first words of a transmission.

15. IRLP System Designer Callsign: VE7LTD Name: David Cameron Addr: 4708 CAULFIELD DRIVE City : WEST VANCOUVER, BC V7W 1G2 Country: CANADA Birthday: 06 Aug 1975 Email: ve7ltd@irlp.net Home Page: http://www.irlp.net

16. VE7LTD and VK2YX

17. Eight months later in 1998 the IRLP network was born and is now on Version 2.0+ of hardware/software and growing in leaps and bounds. IRLP allows the linking of two or more repeaters together using Voice over IP technology (VoIP) where the analogue radio audio is converted to digital IP packets and sent over the net.

18. IRLP requires a full time high speed Internet connection, a dedicated Linux computer, some custom hardware and a link radio. Each Linux box on the IRLP network is assigned a code and a central name-server keeps track of the IP addresses (IP= the routing code used by all packet of internet data flowing on the internet) in use by all nodes.

19. The IRLP uses a Voice-Over-IP (VoIP) streaming software called Speak Freely. Linux is the operating system of choice for the IRLP system as it allows the best in reliability, programmability, efficiency, and functionality. Most IRLP nodes use RedHat Linux 6.2 as it is a very stable release and runs very smooth on any 486 Dx100 class or better computer.

20. David’s custom IRLP software -takes the audio from the receiver which is fed into the sound card - where it is converted into ADPCM digital data the same format used by the phone companies for Long Distance service. IRLP by design requires Amateur Radio access, all QSO’s are over the air. No computer to computer access is allowed (this is not I-link)

21. IRLP … Amateur Radio or Not ?

22. Hardware from VE7LTD The Custom Red Hat CD-ROM The Custom Red Hat CD-ROM Red Hat Boot Diskette Red Hat Boot Diskette Custom IRLP Software Custom IRLP Software Custom IRLP Control Board by Dave Cameron VE7LTD Does COR, PTT & DTMF Does COR, PTT & DTMF DB9 IRLP to Repeater Interface DB9 IRLP to Repeater Interface LPT1 to IRLP Jumper Cable LPT1 to IRLP Jumper Cable

23. DB9 for Xcvr Inter -face DB25 for Data Control from Linux Box & IRLP +12VDC from PC

24. IRLP Indicators on Control Board – DTMF Decode Sense – Carrier Operated Squelch Sense – PTT out to Link Radio or Controller

25. Typical Node Setup No.1 CATV/DSL MODEM Router IRLP Computer w/ Custom Red Hat 6.2 O/S 8-64Kb Internet connection To another IRLP Node 10Mb Ethernet Connection 10/100Mb Ethernet Connection Repeater Controller Link Port Repeater or Remote Base PTT COR Audio RF Link Link Xcvr PTT COR Audio RF Link

26. Typical Node Setup No.2 CATV/DSL MODEM Router IRLP Computer w/ Custom Red Hat 6.2 O/S 8-64Kb Internet connection To another IRLP Node 10Mb Ethernet Connection 10/100Mb Ethernet Connection Repeater Controller Link Port Repeater or Remote Base PTT COR Audio RF Link Link Xcvr PTT COR Audio RF Link with CTCSS gating COS

27. Typical Node Setup No.3 CATV/DSL MODEM Router IRLP Computer w/ Custom Red Hat 6.2 O/S 8-64Kb Internet connection To another IRLP Node 10Mb Ethernet Connection 10/100Mb Ethernet Connection Repeater Controller Link Port Repeater or Simplex Radio PTT COR Audio RF Link PTT COR Audio

28. Node 426 – KD4RAA (1) Internet Hub Multi-Port Switch IRLP Linux Computer w/ Custom Red Hat 7 O/S & IRLP interface 300Kb Internet connection To another IRLP Node 10Mb Ethernet Connection 10/100Mb Ethernet Connection VHF Link Radio PTT,COR, DTMF,TX/RXAudio Local 2M 146.775 Repeater RF Link NODE TO REFLECTOR

29. Node 427 – KD4RAA (2) Internet Hub Linksys Router DHCP IRLP Linux Computer w/ Custom Red Hat 7 O/S & IRLP interface 300Kb Internet connection To another IRLP Node 10Mb Ethernet Connection 10/100Mb Ethernet Connection UHF Link Radio PTT,COR, DTMF,TX/RXAudio Local UHF Repeater RF Link NODE –TO- NODE

30. Node 429 – N4HAJ Kinston Internet Hub Linksys Router DHCP IRLP Linux Computer w/ Custom Red Hat 7 O/S & IRLP interface 300Kb Internet connection To another IRLP Node 10Mb Ethernet Connection 10/100Mb Ethernet Connection UHF Link Radio PTT,COR, DTMF,TX/RXAudio Local UHF Repeater RF Link NODE –TO- NODE

31. 748 – N4JDW Wilmington Internet Hub Linksys Router DHCP IRLP Linux Computer w/ Custom Red Hat 7 O/S & IRLP interface 300Kb Internet connection To another IRLP Node 10Mb Ethernet Connection 10/100Mb Ethernet Connection VHF Link Radio PTT,COR, DTMF,TX/RXAudio Local VHF Repeater RF Link NODE –TO- NODE

32. 741 – KD4RAA-3 Raleigh Internet Hub Linksys Router DHCP IRLP Linux Computer w/ Custom Red Hat 7 O/S & IRLP interface 300Kb Internet connection To another IRLP Node 10Mb Ethernet Connection 10/100Mb Ethernet Connection UHF Link Radio PTT,COR, DTMF,TX/RXAudio Local UHF Repeater RF Link NODE –TO- NODE

34. 100MB Switch 10MB Hub Linksys Router DualBand 2M/440 Control Xcvr 440 Link Radio 2M Link Radio Audio Equalizer and Broadcast Leveling KD4RAA Node 426 / 427 Configuration

36. Modes of Operation There are two modes of IRLP operation Point to Point Mode – Only two repeaters are linked –This mode is much like linking two repeaters together via a link radio or remote base Reflector Mode – Multiple Audio Streams -Much like a party line – everyone hears everyone else

37. Reflector Mode IRLP Reflector RPTR Australia United Kingdom Hawaii North Carolina Canada California Raleigh Reflector 921 Texas

38. Point to Point Mode RPTR IRLP Server Miami Raleigh

39. 30 Australia 3 New Zealand 140 Canada 15 England + Scotland 232 United States IRLP Network

40. Caribbean 1 Barbados 2Dominica 3Trinidad & Tobago Others 1Antarctica 1Ecuador 1Japan 1Netherlands 2South Africa 1Sweden IRLP Network

41. 20+ new nodes per month Nets: IRLP International Nets (biweekly), ISS contacts, JOTA, Kids Net, Special Weather, others IRLP Network

43. AustraliaUnited Kingdom

44. North Carolina’s first IRLP node, more planned 146.775 NC4SU #426 located in Raleigh at 340 feet, near the Fairgrounds, open node, courtesy tone present when IRLP link is active, normally -REF 2 441.725 K4JDR #427 located in Raleigh at 340 feet closed node, NO courtesy tone/ hang when link is active. Linked to 444.875 Raleigh, 444.775 Cary, 444.675 RTP, 444.925 Durham, 444.375 Henderson Control ops: Dan KD4RAA, Ron K4JDR, Todd N2XL Jim WW4M, Byron K4NGJ, Ken N4ZBB, Jack N0VLD

45. East Coast Reflector 921 signed on October 18, 2001. Its Red Hat Linux- based server resides at the offices of Inflow in Research Triangle Park. Jack Thorpe, WA0ERX is the node administrator and is responsible for helping us secure the server and bandwidth at Inflow.

46. The purpose for having our own reflector is to link our regional participating repeaters in the KD4RAA-K4JDR Repeater Group that are out of range of our present RF capabilities. This will give us Emergency and Severe Weather Coordination ability as well as provide support for Public Service Events. We reserve use of 921 for coordinated response to severe weather and other conditions that affect North Carolina.

47. East Coast Reflector 921 has been used to: Track our recent Winter Snow Storm. Nodes from GA, SC, NC, VA participated. Coordinate the Worldwide Boy Scouts Jamboree over the Air. JOTA Make a connection to the McMurdo Science station in Antarctica for a “This week in Amateur Radio Newsline” Feature.

48. “Broadcast” worldwide to participating IRLP nodes the International Space Station (ARISS) educational contact from Chapel Hill. 921 Used as the Primary Backup to the ever popular Denver Reflector 2 (920) Connect our Regional IRLP Repeaters (Kinston, Wilmington, Outer Banks, and others) for Linking and Maintenance.

64. IRLP Node 429 activated December 2001 Doug Blizzard N4HAJ Kinston, NC 444.575 + 88.5 Link on Demand to Ref921 to K4JDR-KD4RAA link System

65. IRLP Node 748 activated April 2002 David Whicker N4JDW Wilmington, NC 145.170 + 88.5 Link on Demand to Ref921 to K4JDR-KD4RAA link System

66. IRLP Node 741 activated April 2002 Danny Musten KD4RAA Raleigh, NC Frequency Agile Currently - 442.675

67. IRLP Nodes soon to come on line Outer Banks (Richard Marlin K4HAT) Greenville, SC (Terry Lambert KB4PQA)

68. Pause between transmissions, listen for others Hold your PTT for about 1 second before talking to allow all nodes time to rise No local rag-chews when on a reflector Do not kerchunk -- which causes all other nodes to key up Do not discuss codes -- refer inquiries to a local control op or request a supporting membership Make sure your signal is solid

69. Anything you do on an IRLP reflector can be heard around the world. Please listen to observe how others do it before you give it a try.

70. For More Information IRLP in Raleigh www.kd4raa.net General Information about IRLP www.irlp.net Node Activity & Connection Status status.irlp.net