Alvondo https://validator.w3.org/feed/docs/rss2.html SIP Trunks Porting numbers :: Sweden Support SIP vpn – Your own realtime network Alvondo :: Your secure SIP trunk Welcome to Alvondo SIP Door Phone service Realtime Content Delivery – in a secure dynamic way Connecting the dots Corporate information CEO: Olle E. Johansson About Alvondo BBtele – Swedish broadband telephony services