A '''stacked channel''' is a channel whose input or output source is to/from another channel , which in turn might have input or output which is to/from another channel , and so on . ** Documentation ** [http://www.tcl.tk/man/tcl/TclLib/ChnlStack.htm%|%Tcl C API]: ** Commands ** [chan pop]: [chan push]: ** Examples ** [Trf]: [TLS]: ** See Also ** [channel]: All ''channel'' , All the Time ! <> Channel | Concept