Yes. There are a couple of ways to do this.
One is use the star code for forwarding.
*72 Call Forward All
*82 Call Forward on No Answer
etc.
The other is to code the SP line via the web interface.
If you look under Calling Features in the settings, you'll see all the options. Just check the one you want and decide which line you want the call sent out with, and include the exact, full number of the destination. This field will not be interpreted by any digit maps, just processed literally.
So, for example, if you want the incoming call on SP1 to go out on SP2 to the toll free information line, you'd put this in the destination number field:
SP2(18005551212)
Considering you generally get two sessions on each SP, you could probably send it out on the same SP it's coming in on.
Good luck.