Thanks Dave, yeh the voice did sound "bursty " but if it does
packetise the packets it doesnt do it consistantly.
every now and then a whole sentence will come through "as clear as a bell".
I wonder if making the call half duplex (push to talk) would be any
better ?
Thanks again
Henry
Dave Donovan wrote:
Hi Henry,
Bandwidth isn't your only (or even primary) concern with satellite
systems. You have to look at the latency. You could have high and
variable latency in one or both directions depending on the type of
service you're using. I spoke with a satellite provider several
months ago and they advised me that they reduce header overhead by
bunching packets up and sending them in big bursts. That's really
going to affect the quality of your voice and I don't think there's
much that a codec change will do.
I'd run a ping for a few minutes and see what happens. Also consider
that this will give you round-trip time and the latency may be very
different if upstream is terrestrial (land line or whatever) and
downstream is satellite. I'm not saying 'give up', just 'watch out'.
Also, I remember seeing a thread along these lines a few months ago.
I think there were a number of pretty intelligent responses. You
might want to check the archives to get the benefit of other people's
knowledge/experience.
I'd be interested in knowing how you make out with it. Good Luck.
Dave
On 4/27/06, Henry Coleman [VoIP-PBX.ca] <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Hi all, I am attempting to set up a SIP phone service to my
cottage near
Bancroft this involves using a friends satellite
internet connection and some kind of wireless bridge.
We've just tried a SIP x-lite softphone which he installed on his PC.
The results are mixed.
He can hear me fine (presumably because his download speed is fast
enough) but his voice is broken up,
every two or three words get cut out making it very difficult to
understand.
Does any one out there know if we can use a narrow band codec or
make some
adjustments to SIP to handle this problem.
This is the only viable solution as the cottage is 6 km from the
nearest
phone line and
is not within range of any cell tower (even with a 3 watt analogue
phone and yaggi antenna).
Hope someone can help.
Henry
--
Henry L.Coleman [ VoIP-PBX ] Tel.1 866 415-5355 Ext.301
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--
David Donovan
Consultant
Fulcrum Solutions
--
Henry L.Coleman [ VoIP-PBX ] Tel.1 866 415-5355 Ext.301
