Closed User group (CUG) is a supplementary service provided by the mobile operators to mobile subscribers who can make and receive calls from any member associated within the group. This service is applicable for SMS also. There will be administrative owner who will be responsible for invoicing. Irrespective of this a CUG member can make and receive calls to and from other networks outside the CUG group too; although calls outside a CUG group may not be invoiced by the administrative owner.[1]
A subscriber may:
be a member of more than one but not more than ten closed user groups;
be permitted to make calls outside of the closed user group (outgoing access);
be permitted to receive calls from outside of the closed user group (incoming access);
be allowed to make emergency calls irrespective of the group subscription.
be allowed to make call inside the closed user group member like incoming and outgoing also.
If the user is a member of multiple closed user groups there will be a preferred CUG assigned by the network that will be used by default. However, it is possible on a per-call basis to specify a different closed user group (of which the user is a member) for the call. It is also possible on a per-call basis to suppress the use of the preferred CUG, i.e. act as if the user is not a member of the closed user group, and to suppress the outgoing access permission, i.e. to insist that the call only go through if the destination is a member of the CUG.
When an incoming call is received it is possible for the network to indicate the closed user group that is being applied to the call to the called user.
For example:
Mr Smith, a senior member at a pizza delivery outlet, could be a member of two closed user groups:
his own team of pizza delivery agents;
his peer group of senior pizza delivery executives.
Mr Smith's preferred CUG would be that of his team. But based on whom Mr. Smith is calling, he can either suppress or enable the preferred CUG. Also, when Mr. Smith receives a call, the network would indicate which user group the call originated from.
As can be seen, this supplementary service is restricted in use only by organizations, and is not for use by the general public. However, there are handsets that support closed user group applications.
^"Closed User Group (CUG) Telecomconcepts". Telecoedge. Archived from the original on 29 September 2019. Retrieved 11 July 2018.
ClosedUsergroup (CUG) is a supplementary service provided by the mobile operators to mobile subscribers who can make and receive calls from any member...
a closedusergroup starting in February 2019 and without user restrictions starting in May 2019. As of April 2020, Trade Republic had 150,000 users. More...
A closed subscriber group (CSG) is a limited set of users with connectivity access to a femtocell. When a femtocell is configured in CSG mode, only those...
India. The main purpose of this network is to create a dedicated ClosedUserGroup (CUG) network and provide a secured and high speed connectivity for...
digital Rupee-Retail (e₹-R), was launched on 1 December 2022, within a closedusergroup (CUG) comprising participating customers and merchants. RBI started...
Presentation (CLIP)/ Restriction (CLIR). ClosedUserGroup (CUG). Explicit Call Transfer (ECT). This service allows a user who has two calls to connect these...
MPEG streams as user data are: Aspect ratio information "Hidden" information per the Active Format Description specification Closed captioning per the...
proposals, design solutions are prototyped and then tested with the target usergroup even before launching the product in the market. This process is repeated...
CUG may refer to: ClosedUserGroup, groups of GSM mobile telephone subscribers Genetic code for leucine China University of Geosciences (Beijing) China...
edited, commented and searched. A user can also create groups to share notes and collaborate with a closedusergroup. Memonic operates on a freemium model...
signed up to Micronet 800 to make it the largest CUG, ClosedUserGroup, on Prestel; its total user base peaked at 90,000. Micronet achieved over 1.1 million...
is accessible by any Internet user. Generally, a proxy server only allows users within a network group (i.e. a closed proxy) to store and forward Internet...
the source code. Shareware is closed-source software whose owner encourages redistribution at no cost, but which the user sometimes must pay to use after...
hidden from the ordinary end user, such as the time and date of the last update, whether the frame was in a ClosedUserGroup (CUG), the price to view the...
reading and posting to them, via a shared user interface. In addition to accessing Google groups, registered users can also set up mailing list archives for...
Messages are typically transmitted between two or more parties, when each user inputs text and triggers a transmission to the recipient(s), who are all...
Government of West Bengal. Retrieved 12 January 2020. "Area wise ClosedUserGroup (CUG) Telephone Numbers" (PDF). Sodepur Area. Eastern Coalfields Limited...
applied to users, the terms least user access or least-privileged user account (LUA) are also used, referring to the concept that all user accounts should...
Government of West Bengal. Retrieved 12 January 2020. "Area wise ClosedUserGroup (CUG) Telephone Numbers" (PDF). Sodepur Area. Eastern Coalfields Limited...
Global Information