I’m using TDM411B, and some SIP softphones. When I’m doing internal calls (not using PSTN) the quality is acceptable. But when I call to the pstn the voice quality is very bad, there are cuts, conversation goes and return, etc. Do you know how to correct this…?
I´m using asterisk 1.2.7, Digium TDM411B, X-lite softphone
and PC PIII 533 Mhz. 256 Mb. RAM