Need telco dial tone

I have just recently set up freepbx, I have 6 cisco spa509g phones
and 3 spa3102 on 3 analog lines, everything works except we need to be able to drop to the real telco dial tone on line 1 does any one know a easy way to do it ?

Thanks,

Are you wanting to do some type of call forwarding on that line?

yes so we can use telco call forwarding

You can probably use some similar configurations like in this thread to get to where you need, disregarding the Dahdi stuff. http://www.freepbx.org/forum/general-help/feature-code-to-send-72-to-analog-line-on-a-digium-analog-card