[trunkgroups]

[channels]
context=pstn-pri0
; Sample PRI (CPE) config:  Specify the switchtype, the signalling as
; either pri_cpe or pri_net for CPE or Network termination, and generally
; you will want to create a single "group" for all channels of the PRI.
;
pridialplan=unknown
switchtype = national
signalling = pri_cpe
group = 2
channel => 1-23
usecallerid=yes
hidecallerid=no
transfer=yes
threewaycalling=yes
cancallforward=yes
echocancelwhenbridged=yes
echocancel=yes
rxgain=0.0
txgain=0.0
immediate=no
usecallingpres=yes