Hi To be honest I do not know is it really problem with encoding. We integrate OpenSer with Radius and during INVITE phase Freeradius receives: Digest-User-Name = "test001" Digest-Realm = "test.pl" Digest-Nonce = "44be69da8b019499f882d3422d4e80e54a457bee" Digest-URI = "sip:+48580001@test.pl" Digest-Method = "INVITE" Digest URI contains "sip:+48580001@test.pl" which is value typed by user. But few lines below sql statement is called but this time Digest URI has incorrect value: test.authorize_reply('test001@test.pl', 'sip:=2B48580001@test.pl', 'INVITE' )' '+' character was converted to hexadecimal representation. Do you know why this conversion happen? And how to switch off this conversion. Regards Michal Szymanski