I have an analog line provisioned on an Adtran Ta908e FXS. The Metaswitch is configured to expect a "9" for external dialing. I am trying to configure the IAD digit map, dial-plan or any other method for "assume 9 dialing" which means the IAD would always add a 9 in front of the digits dialed before sending the call to the Metaswitch. Is this possible?
I know this is a really old post, others may have the same question.
You can add the "match dnis" line below to your SIP voice trunk and that will take ANYTHING dialed and replace it with 9+ANYTHING (prepending 9 to anything dialed). Just note, this will add a 9 in front of star codes and will break them.
voice trunk T01 type sip match dnis "$" substitute "9-$"