But does Ian still get this weird Call from Alison when she is away
I should mention that my playthroughs were done on the alpha and not the beta, though I doubt this will be changed or needs changing.
As for the playthrough, no Ian does not receive a phonecall at all from Alison, since Jeremy is not there with her. I also told Jeremy that he can try his chances with her very early on in the game but it looks like it didnt matter here.
is there another Version of her call
Apparently there is but personally I have not tried this one. Few pages back someone mentioned that it is possible for Jeremy to go on the trip and yet Alison does not call Ian. Apparently for that to happen, Jeremy has to have slept with Alison the first time but Ian has to tell Jeremy "Alison is mine", that way Jeremy follows Alison to her trip but does not try anything with her.
edit: if you meant another version of the phonecall itself, then no, I think the actual dialogue in the phonecall is always the same.
And of course there's the scenario where Alison calls Ian but Ian does not receive the video from Jeremy that we discussed not too long ago. The way I got that was let Jeremy sleep with Alison the first time, tell Jeremy he can try his luck with Alison, then decline the trip with Alison.
In all of the above Ian has pursued Alison, the difference being whether Jeremy has slept with Alison at all and whether Ian has told Jeremy "Alison is mine".