Am Freitag, 25. Februar 2005 14:42 schrieb michel memeteau: > you are gonna laugh , it s even worst than that , I think they only have > G711 or maybe GSM , for the moment when I call in an australian PSTN ( it s > unlimited free ) it s using G711 , so it could be impossible for a dialup > to call PSTN .... By the way I don t understand why they dont use an open > IPBX as they are the guy from Linspire and phongaim and stuff ..... and > they proned opening SIP devices against vonage.... > > A lot of people have asked on their forum but no reason was given ..... > > BTW , could you point me to other SIP clients ??? Xlite on linux is really > ....beta ..... There are good reasons to use G.711: Low complexity - modern, high efficient codecs use a lot of computing power, so if you want to do a lots of channels, you have to trade bandwith for low complexity. Especially Speex needs a lot of cpu power ... High quality - if you are providing a PSTN gateway, you want to have the best possible narrowband codec - and G.711 is your choice then. Even the best modern codecs will give a (unnoticeable) worse quality. Fax transparency - G.711 is the only codec you can transfer Fax over transparently. Low latency - if you dont care about bandwith, G.711 gives you the lowest latency Greetings, Stefan -- Stefan Brüns / Kastanienweg 6 - Zimmer 1206 / 52074 Aachen mailto:lurch gmx li http://www.kawo1.rwth-aachen.de/~lurchi/ phone: +49 241 169-4206 mobile: +49 160 3797725
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