I just bought C475IP ansaphone, getting some help to setup.

a. How to set the system to recognise the incoming second call, how to
keep the first call on hold to answer the second call.
b. Is it possible to transfer the first call(on hold) to another VOIP
line and if it is how?
c. Are there any message/light/voice indication when there is a
message in answering machine, without actually checking the handset.

Thanks for the same.

Regards.