Kamaraju S Kusumanchi wrote:
Martin wrote:
Hello,
I find out that gaim is able to use text messaging with many
programs. I want to use voice messaging (use it as phone)
when other person is using Yahoo Messenger on MS Windows.
Is there some program for debian that can do this?
Friend told me that he is using Yahoo Messenger on
dial-up connection. I only have 33k dial-up too and am
hoping to be able to use it. How much bandwith does
protocol for transferring voice need?
Martin
AFAIK, gaim can't do voice chat. Use Skype for voice chat. Skype works both
in Linux, Windows.
raju
In the US, a 56k dialup running at 53k (max allowed by law, and rarely
achieved in practice) gives you just about the necessary bandwidth for
voice over IP, *and nothing else*. Overhead, or some other piece of
software phoning home, will just about kill it. POTS (plain old
telephone service) lines are really a voice medium, it's kind of ironic
that it's hard to do voice over a voice line.
50,000 bps - 20% for overhead = 40,000 bps. 40,000 divided by 3 is
about 13,000 Hz max frequency, one channel of FM-quality sound. For
voice, 8,000 Hz will do. Going the other direction, 3 x 8,000 = 24,000
bps. 24,000 is 80% of 30,000. So, using these assumptions, 33k dialup
for VOIP is just barely feasible. Using compression, it should be
possible.[0]
I expect it would work with the right software. As Kamaraju wrote, gaim
is not the place to start.
Mark Allums
0. Not a voice-over-IP expert, and yes, I *have* heard of Nyquist.
Three samples at the highest desired frequency gives better results,
especially for voice. What modulation does Skype use? Some type of
delta modulation would be my guess for dialup, but I have no real idea.
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