Howto assign a number to an analog port?

I m using asterisk with 2 isdn port 1 analog port and a normal network port. The 2 isdn ports are connected to 2 ntba’s and the network port is conected to the internal network. My sip communicatition works fine.

My problem is the analog port. I m trying to connect an analog fax. Is this possible? How can I configure the telefonnumber of this port?

Thank everyone for hints.

Cheers jmohns

just use

exten = msnisdnnumber,1,dial(zap/portnumber)

or dahdi/portnumber