Symetrix I/O Cards¶ Symetrix 4 Channel AEC Input Symetrix 4 Channel Analog Input Symetrix 4 Channel Analog Output Symetrix 4 Channel Digital Input Symetrix 4 Channel Digital Output Symetrix 2 Line Analog Telephone Interface Card Symetrix 2 Line VoIP Interface Card Symetrix USB Interface Card I/O Card Removal and Replacement