ioannis@56: Channels
ioannis@56: ========
ioannis@37: 
ioannis@37: 
ioannis@37: 
ioannis@37: .. _signal-types:
ioannis@37: 
ioannis@37: Signal types
ioannis@56: ------------
ioannis@56: (explain here all the signal type abbreviations).
ioannis@56: 
ioannis@56: 
ioannis@56: Connection channels to systems
ioannis@56: ------------------------------
ioannis@56: 
ioannis@56: Each channels should be connected to at least one system.