The SF-TPS24A is an eight-section audio sending chassis compatible with RDL Format-A twisted pair products. Three +4 dBu balanced line-level sources may be connected to each section on a detachable terminal block. That section converts and transmits those signals on pairs A, B and C of the associated RJ45 connector, the SF-TPS24A feeds all three signal pairs in the twisted pair cable. No other sending modules may be connected on the same cable with each RJ45 output