In the All Sales Orders view, the channel field shows channel ID for retail stores but shows the channel name for call centers. It should show the channel name for all channel types. 

Furthermore, you are not able to use this field as a filter, which would be useful

Category: Call Center app
Under Review
Ideas Administrator

Thank you for the idea!  We will consider this in our product backlog and update the status of your idea if/when it becomes a planned or completed feature!