> For the complete documentation index, see [llms.txt](https://prosbcdocs.telcobridges.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://prosbcdocs.telcobridges.com/telecom-references/other-pages/active-standby.md).

# Active/Standby

### **Active**

Active is a state that indicates which application instance is operating the system.

### **Standby**

Standby is another instance state that indicates that the application instance is not performing any operations and is waiting to take over. (As opposed to [Master/Slave](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/misc/master-slave/README.md) applications where the slave instance can still perform operations

### **Example**

Example: toolpack\_sys\_manager is an active/standby type application. The active toolpack\_sys\_manager is the only instance that takes action on the whole system, the standby toolpack\_sys\_manager waits to takeover if the active toolpack\_sys\_manager fails.


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