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

[Ing. Angel Gomez]

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...