Configuracion system.conf para redfone.
eth0/00:50:c2:65:xx:xx se sustituye por la mac del servidor asterisk

##Automatically Generated dahdi configuration file
##Generator Version 0.3.3
dynamic=ethmf,eth0/00:50:c2:65:xx:xx /0,31,0
dynamic=ethmf,eth0/00:50:c2:65:xx:xx /1,31,0
dynamic=ethmf,eth0/00:50:c2:65:xx:xx /2,31,0
dynamic=ethmf,eth0/00:50:c2:65:xx:xx /3,31,1
cas=1-15:1101
dchan=16
cas=17-31:1101
alaw=1-31
cas=32-46:1101
dchan=47
cas=48-62:1101
alaw=32-62
cas=63-77:1101
dchan=78
cas=79-93:1101
alaw=63-93
cas=94-108:1101
dchan=109
cas=110-124:1101
alaw=94-124
　
loadzone=us
defaultzone=us