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Chapter 10 – Supplementary Services Commands
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 91
Closed User Group +CCUG
Description: The Closed User Group Supplementary Service enables subscribers to form closed user groups with
restricted access (both access to and from).
The CUG supplementary service is described in GSM 02.85. This service is provided on prior
arrangement with the service provider. Subscription options should be selected at implementation.
The +CCUG command is used to:
• Activate/deactivate the control of CUG information for all following outgoing calls
• Select a CUG index
• Suppress outgoing access (OA). OA allows a member of a CUG to place calls outside the CUG
• Suppress the preferential CUG. Preferential is the default CUG used by the network when it does
not receive an explicit CUG index
Values: <n>
0 Disable CUG mode (default)
1 Enable CUG mode
<index>
0-9 CUG index (0 default),
10 Preferred CUG
<info>
0 No information (default)
1 Suppress OA
2 Suppress preferential CUG
3 Suppress OA and preferential CUG
Note: To activate the control of the CUG information by call, add [G] or [g] to the ATD command.
Index and info values will be used.
Syntax: Command syntax: AT+CCUG = <n> [ ,<index> [ <info> ] ]