SureStream technology is a revolutionary innovation from APT that enables broadcasters to use inexpensive IP links and still maintain professional broadcast-grade audio quality and reliability. It delivers the audio quality and reliability you expect from a T1/E1 link at a fraction of the associated cost. SureStream also offers the added benefit of Always-On Redundancy. With SureStream technology, you can save thousands on your audio transport bills and still offer your listeners the highest quality sound. Surestream Option for APT-IP-CODEC.