1. Title

2. Linking through Voice Over IP

3. VOIP Advantages
Low Cost
Flexible
Fast to bring up

4. VOIP Disadvantages
Reliability
Delay
Missing packets

5. 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

8. Comparison of Systems

9. Web Sites IRLP: www.irlp.net Echolink: www.echolink.org
WIRES:
eQSO:

10. Easy Ways to Get on IRLP WA7GIE (three repeaters) UARC 146.76
IHC
SDARC

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

12. 146.76 Lake Mtn (Node 3352) Requires UARC membership
ID, prefix, node number in one transmission
Have QSO
ID, prefix, “73” to hang up

13. 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

14. SDARC 147.08 Membership in SDARC required Both IRLP and Echolink
See for details

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

17. 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

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

19. Creating Your Own IRLP Node

20. 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)

21. 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

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

25. “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.

26. Legal Issues Simplex nodes must have control operators
Observe third-party traffic rules
See