I've been using Jitsi as my XMPP client for a year or so, and am very
happy with it, but recently I've tried using it as a softphone for my
SIP account (on anveo.com), and been disappointed. Voice quality is
consistently poor (broken up, noisy), while when I use Zoiper (from
zoiper.com) as my softphone for the same SIP account, on the same
Internet connection, call quality is consistently good.
I am wondering whether there is anything I can do to improve SIP
performance with Jitsi, because I'd much rather have a single client for
all my messaging needs.
The only audio codecs that anveo.com supports are GSM and u-law.