# Operating

- [Operating Etiquette](https://help.brandmeister.us/operating/operating-etiquette.md): General Guidelines in operating on the BrandMeister Network
- [Access Denied Message](https://help.brandmeister.us/operating/access-denied-message.md): If hearing the message "Access Denied" this means Air Security Enabled.
- [User Blocked Message](https://help.brandmeister.us/operating/blocked-message.md): If hearing the message "User Blocked" this means you have activated the loop prevention.
- [Talkgroup Block Message](https://help.brandmeister.us/operating/talkgroup-block-message.md): If hearing the message "Talkgroup Blocked" this means the talk group is blocked.
- [TAC Channels](https://help.brandmeister.us/operating/tac-channels.md): Non-Primary channels aiding in  relieving congestion on primary/statewide talk groups. Temporary Channels to continue conversations.
- [Talk Group 3100](https://help.brandmeister.us/operating/talk-group-3100.md): Talk group 3100 is the main talk group for the United States Amateur Radio Operators on BrandMeister.
- [Talk Group 31000](https://help.brandmeister.us/operating/talk-group-31000.md): Talk Group 31000 - USA Emcomm is for those wishing to talk about Emcomm Related Topics/Issues which may include Weather Related, Emcomm Communications.
- [Statewide Talk Groups](https://help.brandmeister.us/operating/statewide-talk-groups.md): Statewide calling channel for DMR Users in the state. Statewide are 4-digit talk groups.


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