> 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/hosts.md).

# Hosts

The [TMG7800](https://telcobridges.com/media-gateways/products/tmedia-gateways/tmg7800/) was designed for high-capacity, high-performance and high availability in mind.

There are 3 features available for the TMG7800-CTRL

### TMG-CONTROL

When dealing with a high capacity system, TelcoBridges recommends to use 2 TMG7800-CTRL units. The goal is to minimize down time in case of failure. When 2 TMG7800-CTRL units work in redundancy, 1 is considered as [Active](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/misc/active-standby/README.md), the other [Standby](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/misc/active-standby/README.md).

Here is an example TMG7800-CTRL unit switchover:

Default Host redundancy setup where [Primary](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/misc/primary-secondary/README.md) TMG7800-CTRL unit is [Active](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/misc/active-standby/README.md) and [Secondary](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/misc/primary-secondary/README.md) unit is [Standby](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/misc/active-standby/README.md)

![TMG7800-CTRL Redudancy Setup](https://docs.telcobridges.com/w/images/d/df/Ha_Host_Redundancy.png)

In the eventuality where the [Primary](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/misc/primary-secondary/README.md) unit fails, the [Secondary](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/misc/primary-secondary/README.md) unit will take over management of the system.

![TMG7800-CTRL Redudancy With Primary Failure](https://docs.telcobridges.com/w/images/7/72/Ha_Host_Redundancy_Primary_Fail.png)

When the [Primary](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/misc/primary-secondary/README.md) recovers, the [Secondary](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/misc/primary-secondary/README.md) unit will remain the [Active](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/misc/active-standby/README.md) unit

![TMG7800-CTRL Redudancy With Primary Recovery](https://docs.telcobridges.com/w/images/3/34/Ha_Host_Redundancy_Primary_Recover.png)

### Dual Power Supply

Each of the TMG7800-CTRL contains dual AC or DC power supplies. For more details, see the power supplies page.

### Hard Disk

One of the most common failure for server are hard disk failure. Which is why all TMG7800-CTRL units are supplied with 2 hard disks setup in [RAID1](http://en.wikipedia.org/wiki/RAID). It is important to mention that the hard disks are hot-swappable.

* TMG7800-CTRL Hard Disk Replacement Procedure


---

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