Asterisk: chan_dahdi.c: No D-channels available! Using Primary channel as D-channel anyway!
If you are experiencing the following error in /var/log/asterisk/full: WARNING[8207] chan_dahdi.c: No D-channels available! Using Primary channel 48 as D-channel anyway! WARNING[8207] chan_dahdi.c: No D-channels available! Using Primary channel 48...