voici la conf des fichiers et merci pour ta réponse
fichier dadhi_channel.conf :
; Autogenerated by /usr/sbin/dahdi_genconf on Wed Dec 15 07:51:46 2010
; If you edit this file and execute /usr/sbin/dahdi_genconf again,
; your manual changes will be LOST.
; Dahdi Channels Configurations (chan_dahdi.conf)
;
; This is not intended to be a complete chan_dahdi.conf. Rather, it is intended
; to be #include-d by /etc/chan_dahdi.conf that will include the global settings
;
fichier chan_dahdi.conf :
;
; DAHDI telephony
;
; Configuration file
[trunkgroups]
[channels]
language=en
context=from-zaptel
signalling=fxs_ks
rxwink=300 ; Atlas seems to use long (250ms) winks
;
; Whether or not to do distinctive ring detection on FXO lines
;
;usedistinctiveringdetection=yes
usecallerid=yes