1 Channel Video Server A single channel video server or encoder may also be referred to as a 1-Ch or single channel video server. A 1-Ch video server will allow for a single analog video feed to be connected for conversion to a digital video feed accessible over an IP network for mobile video surveillance applications. Single channel video servers include audio support, digital input/output (Digital I/O) support, analog loop-through video output and even PTZ support for analog cameras capable of PTZ operation. If you intend on converting multiple analog video devices to digital video then you require one 1-Ch video server for each device you intend on converting. Or simply choose multi-channel servers