HDS-4500
5x1 HD/SD Digital Video Switcher

AMS-4171
Relay Changeover Switcher Video/SDI + 2 Audio

AMS-4172
3G/HD/SD-SDI, ASI, G.703, Video, Audio Relay Changeover Switch

AMS-4371
3G/HD/SD-SDI, ASI, G.703, Video 4 Port Changeover Relay