On 1/12/11 5:42 PM, peterpet wrote: > Show your chan_dahdi config, > i think the layout of the options are not correct. [channels] echocancel=yes echocancelwhenbridged=no usecallingpres=yes usecallerid=yes hidecallerid=no callwaitingcallerid=yes signalling=ss7 ss7type=itu ss7_called_nai=dynamic ss7_calling_nai=national ss7_nationalprefix=0 ss7_internationalprefix=00 ss7_subscriberprefix=1 ss7_networkroutedprefix= ss7_unknownprefix= [snip] with this config the ss7_subscriberprefix is not being stripped off of the dialed number if it's a match for it. However if I dial a number with matching nationalprefix, that one gets stripped off. I think the issue with subscriberprefix not being stripped out has to do with ss7_calling_nai=national, do I need to switch it dynamic as well? However my side of the ss7 is always treated as national. Thanks for your time, Vahan