That 2nd line is for the 1.6.x asterisk servers, with the stdexten macro. Guess it doesn't work in some of the other distributions, glad it works for you.I didn't seem to need the 2nd line. It seemed to break any DID number I put against it, returning a "603 Declined" from asterisk to my ISP. Not sure what that's all about.
I only wanted one DID number to pop-up in Mediaportal, so I just put my DID number into the first line as you described.
Many thanks, exactly the tip I needed.