# System Upgrade

###  Introduction

TelcoBridges' products can be upgraded to:

* Increase a unit capacity
* Acquire new features / enhancements

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System upgrades are achieved by using one or more of the following methods:

### Hardware Upgrades

When purchasing increased capacity, the unit may required additional VoIP hardware. Contact [technical support](/troubleshooting-and-support/support-links/contacting-telcobridges-technical-support.md) for the hardware upgrade procedure.

### License Upgrades

A license upgrade is required in the following situations:

* Increasing the capacity / unlocking a signaling stack
* Upgrading to a new major version
* Extending the expiration date of a temporary license
* Converting a temporary license into a permanent license

#### Reference

* How to download/install the license: [Downloading a License for SBC Units](/initial-installation/2.-initial-configuration/initial-setup.md)

### Release Notes

Consult our [release notes](https://telcobridges.atlassian.net/wiki/spaces/PUBLICDOC/pages/83918863/Release+notes) page to learn about the details of each software release.

#### Migrate current database

An option is available to whether migrate change made in one software version database to next major version database during a major software upgrade in special circumstance.<br>

* See [Migrate current database](/maintenance-and-troubleshooting/system-upgrade/activating-a-software-release/migrate-current-database.md).

#### Operating System Upgrades

The software is running over Telcobridges operating system. To upgrade the operating system, it requires the following procedure:

* [Upgrade Linux packages](/maintenance-and-troubleshooting/system-upgrade/linux-software-packages-upgrade.md)


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