[Asterisk-biz] VoIP over satellite
Kevin P. Fleming
kpfleming at starnetworks.us
Mon Nov 22 19:01:13 MST 2004
Eric Hall wrote:
> That 1 second each direction you talk about. Is that to start that call?
> I would say 1 second delay is not usable for most.
Actually, the raw speed-of-light delay is about .6 second round-trip.
The remaining latency is due to equipment, packet formatting and
To directly answer your question: no, it's not to start the call, it's
always. Every single packet from one end to the other takes around half
a second to make the trip, plus network latency on the ground (on both
ends). It would not at all be surprising to experience a total
round-trip delay of 2 seconds.
People who are using this sort of connection understand about the delay,
because it's present with all satellite based phone service.
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