I have set local call forwarding from number A to number B. If I park number B will I receive calls from both when I'm abroad?
Yes, as long as the number you park is only used to receive forwarded calls, your local forwarding settings will remain intact and you will receive incoming calls from both numbers.
While abroad, you will only be able to make outgoing calls with your parked number.
Note, that even though we do not discourage forwarding calls to your parked number in such a way, we are not responsible for any malfunction that happens outside of the classic Roamer forwarding scheme.
Remember to check with your operator for any possible extra fees on local and international call forwarding.