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  Topic: Are Dropouts a common problem? (30 replies)
#31     Fri Jun 22, 2007 12:04 pm
W7RJR
Spokane, WA
 
Join Date: Oct 2006
Posts: 114
Subject:

Doug

You say that latency is not an issue for this program because hams use it?I will have to give that some real thought.

There really isn't a port-forwarding 'problem'. People have been unduly convinced to fear configuring their router/firewall. If you are going to use a router or firewall you should learn to configure it. Certain programs will be blocked and must be allowed access. If you use a wireless router you had better learn to setup the security.

The phone company will do anything to get your business so what you say does not surprise me. If true, it would be a good case to stay away from DSL. Perhaps there is a 'firewall' built in to these modems. That would not be all bad for those who may have neglected to install one.
The answer to this problem is 'buy' your own modem!

You are right that Echolink and other VOIP programs will not work through a wireless internet connection you do not control. The demonstration at the college was doomed to fail with Echolink because nothing was done to make it work. To say that a UDP program can 'never' be made to work at schools, corporations, hotel rooms, etc is not really correct. Here is why.

Had you and the college used static IP addressing through NAT and opened a few ports for you it would have worked perfectly with Echolink. That would have required a bit of prior coordination. There is no problem opening a port and using UDP through your own wireless internet connection. You control it and you can open ports and forward them to a specific IP address. This works great on your home wireless network. Sure, you can't do this when using a hot spot because they use DHCP to hand out IP addresses and wouldn't want to open ports for you anyway. That doesn't mean it could never work. These hot spots are not that often used with CQ100 anyway. It also means that if you do not allow ports to be opened you will not be able to use any of those 'other' programs.

For those travelling with a laptop, RV camping and using air cards there is a strong argument for using TCP. For the rest of us the trade off in performance becomes questionable.

Balancing the advantages and disadvantages is a design choice.



TTYL

73
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