[Asterisk-Users] update re. Grandstream + SIP + Echo problems ..

[Dave Alan Caruana]

it's 512k/128k actually ...

:)

Dave

----- Original Message -----
From: "Ing. Angel Gomez" <angom at telnor.net>
To: <asterisk-users at lists.digium.com>
Sent: Thursday, September 04, 2003 9:23 PM
Subject: Re: [Asterisk-Users] update re. Grandstream + SIP + Echo problems
..


> WipeOut . wrote:
>
> >>now .. i have one slight problem left .. although most of my SIP
> >>phones are on a LAN connection with the asterisk server,
> >>there are two phones which are at a remote office bridged to
> >>my LAN via a 128k point to point ADSL .. these do not seem
> >>to be working well, you do hear speech but the remote person
> >>(dialled over PSTN through an X100P) hears it low and garbled ..
> >>I am assuming it's due to the delays in stuffing 64kbits (of g711)
> >>over a 128k link and was thinking of switching to G729.
> >>
> >>
> >>
> >
> >Rememeber G.711 is 64Kbps without overhead.. Actual bandwidth required is
somewhere around 87Kbps.. On a 128Kbps line if anything else uses the line
you will get clicks and breaks in the transmission..
> >
> >
>
> Mmmmhhhhh, Does not ADSL stands for ASIMETRIC Digital Subscriber Line ?
> So if its a 128 Kbps ADSL... what is your Asimetry relation ? You might
> be having 128 Kbps in one way but 64 Kbps ( Or less ) on the other...
>
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