Do you really really wanna know what does cug mean? Really?
Now is a good time to learn it. Read further to find out.
So simple yet uncertain. Those who read will find out.
Closed User Group.
Enables users to be assembled into groups of varying sizes and
geographical areas. Access to and from the group is restricted and so a particular user may only communicate within their own group. Therefore a CUG formed within the ISDN allows private intracompany communications to take place within the public ISDN. Using ISDN eliminates the cost of installing an expensive network of leased lines.