First off, Any phone can be a MEMBER except a QCC.
Loggin in and out, Depending on the Release of Magix, Prior to 2.1:
# 44 to log in, #* 44 to log out.
With 2.1 and LATER a member can be assigned to more than one calling group, in that case:
INDIVIDUAL CALLING GROUP:
LOG IN = # 764 + The Calling Group EXTENSION
LOG OUT = # 765 + The Calling Group EXTENSION
ALL CALLING GROUPS
LOG IN = # 764 + *
LOG OUT = # 765 + *