Is there any way to setup TON to unknown and NPI to ‘isdn-telephony/E.164’ ?
Asterisk 1.6 allows you to specify the TON and NPI seperately. This is a new feature that was introduced in Asterisk 1.6.
Read between lines 109-133 of this config file:
svn.digium.com/view/asterisk/tag … iew=markup
It tells you how to individually set the TON and NPI in the dialplan(extensions.conf).