[channels]
context = from-pstn
switchtype = national
usecallerid = yes
echocancel = yes
echocancelwhenbridged = yes
rxgain = 0.0
txgain = 0.0

signalling = fxs_ks
group = 0
channel = 3-4

signalling = pri_cpe
group = 1
channel => 25-47

signalling = pri_cpe
group = 2
channel => 49-71