Heavy- This is just me. No-I do not put a time limit on the phone calls (but in my case they are infrequent and not at bedtime due to STBX's work schedule). If he did call at bedtime - I would have no problem cutting it short when it was time to get ready for bed.
You bring up the issue with the phone calls frequently in your thread - and it's clear it bothers you. Look - this is a bit tricky. On the one hand - you want the kids to feel like they have some input. On the other hand - as with all things D related, you don't want the kids to feel in the middle. Talking to them about it and having them agree that its "fair" seems like it is flirting with that line a bit. They are 9 and 6 - do you think they will really be confident enough to disagree with you (and they might be - I know I worry with D7 that she is always trying to please me and tell me what she thinks I want to hear).
So...it's totally reasonable to not let phone calls interfere with bed time. I'm not so sold on a strict ten minute time limit. And...I would remove any concerns about what's "fair" - just look at what your kids need (and you never know, that might be more time on the phone with you as well).
