Someone

[trunkgroups]

trunkgroup=>1,24
spanmap => 1,0,0
spanmap => 2,0,0
spanmap => 3,0,0
spanmap => 4,0,0

[channels]

switchtype=national
signalling=pri_cpe
pridialplan=unknown
prilocaldialplan=unknown
usecallerid=yes
callerid=asreceived
echocancel=yes
echocancelwhenbridged=yes
echotraining=yes
rxgain=0.0
txgain=0.0
musiconhold=native
language=en
context=inbound

group = 1
channel => 1-23,25-96