Casting Spells through a Forcecage

[wertyou2]

My question concerns the "Windowless Cell" form of this spell. The spell states that "walls of force" form its sides, and I'm a bit confused as to whether the same restrictions on spells that wall of force has (namely, nothing except teleportation) applies, or if it's different.

Thanks!

[Drake Brimstone]

The Windowless Cell form of the spell blocks line of effect for spells other then Teleportation and other forms of Astral travel.

[Slithery D]

Create Mindscape also doesn't require traditional line of effect.

[Dragon78]

What about summoning spells?