Rear panel overview, 1 in from ant, 2 out to tv – Sonic Blue 4500 User Manual

Page 11: 3 s-video in, 4 s-video out, 5 video/audio in 1/in 2, 6 video/audio out 1/out 2, 7 ethernet (10/100baset), 8 vga, 9 digital audio out (optical)