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Linking through Voice Over IP

VOIP Advantages Low Cost Flexible Fast to bring up

VOIP Disadvantages Reliability Delay Missing packets

Works Like A Telephone System Dial a number to connect to a node Look up the number in a directory Can’t connect if node is busy

Comparison of Systems

Web Sites IRLP: www.irlp.net Echolink: www.echolink.org WIRES: www.vxstd.com/en/wiresinfo-en/ eQSO: www.eqso.org

Easy Ways to Get on IRLP WA7GIE (three repeaters) UARC 146.76 IHC 448.55 SDARC 146.08

WA7GIE (node 5620) 449.425 Nelson Peak 449.475 Lake Mountain 449.55 Lewis Peak 100 Hz tone Always connected to Western Reflector (node 9250)

146.76 Lake Mtn (Node 3352) Requires UARC membership ID, prefix, node number in one transmission Have QSO ID, prefix, “73” to hang up

448.55 IHC Lakepark No membership required PL = 123.0 Send “3078”; Wait for response Send node number; Wait for response ID; Have QSO Send “73”; ID; Drop Carrier

SDARC 147.08 Membership in SDARC required Both IRLP and Echolink See www.ecso.com/sdarc.html for details

Getting a Contact Check time zones Mention you’re from Utah Wait several minutes Use a reflector

Western Reflector Channels 0: Calling and QSOs 1: Linking and QSOs 2: Special feeds – listen only 3: Open QSO and linking; CA emergency 4: Hawaii/Pacific Rim linking 5: Special activities (e.g. balloon); QSOs 6: Calling and QSOs

Western Reflector Channels 7: Calling and nets: various emergency groups 8: Linked to Echolink node 152566, NV-GATE, ARRL, Skywarn 9: Reserved for ERC-ECS nets; no QSOs.

Creating Your Own IRLP Node

Computer Requirements P133 or better 96 Meg RAM Approved sound card Parallel port Network card (duh!) Internet connection 40,000 Bits/sec or more IRLP Card (w/Linux)

Steps to Establish Node Buy the IRLP interface card Get Linux installed and running Let IRLP people know how to access it Wait for IRLP people to upload IRLP Interface audio and test

Repeater or Simplex Node? Repeater must be coordinated Simplex node must have control operator

“Gotchas” No IDs may be sent down Internet No touchtones may be sent down Internet No courtesy tones may be sent down Internet PTT sent to Internet may not include hang time.

Legal Issues Simplex nodes must have control operators Observe third-party traffic rules See http://www.arrl.org/qst/2003/02/VoIP.pdf