DumpChan() — Dumps information about the calling channel to the console
Displays information about the calling channel, as well as a
listing of all channel variables. If
min_verbose_level is specified, output is
displayed only when the verbosity level is currently set to that
number or greater.
exten => s,1,Answer() exten => s,2,DumpChan() exten => s,3,Background(enter-ext-of-person)