[root@asterisk-vgdl ~]# cat /etc/asterisk/dahdi-channels.conf
;Sangoma A102 port 1 [slot:4 bus:10 span:1] <wanpipe1>
context=from-pstn
group=0
;echocancel=yes
;signalling=em_w
;channel => 1-31
signalling=mfcr2
mfcr2_variant=mx
mfcr2_get_ani_first=no
mfcr2_max_ani=10
mfcr2_max_dnis=4
mfcr2_category=national_subscriber
mfcr2_call_files=yes
mfcr2_logdir=span1
mfcr2_logging=all
mfcr2_mfback_timeout=-1
mfcr2_metering_pulse_timeout=-1
channel => 1-15,17-31