This page refers to a public Artifactory instance that is no longer available. Please contact us via support if you require more information.

Before you install Sentinel VoLTE, you need to download the SDK package, get other required software.

You can then either:

  • let the built-in installer install both the Rhino SDK and Sentinel VoLTE, or

  • install and configure Rhino and the JVM manually, then use the installer to install Sentinel VoLTE into your Rhino

In both cases you need to get a license.

Allowing the installer to install both the Rhino SDK and Sentinel VoLTE software is recommended for functional testing or experimentation with Sentinel VoLTE. For production installs and/or load testing it is recommended to manually install and configure Rhino and the JVM.

Finally, if you are planning to install Sentinel VoLTE on an existing Metaswitch Rhino installation (for example, to use clustering), it makes sense to refer to other Metaswitch product dependencies

Download the Sentinel VoLTE SDK package

To get the latest Sentinel VoLTE SDK package go to https://repo.opencloud.com/artifactory/opencloud-sentinel-volte-3.0.0/opencloud/volte/3.0.0/sentinel-volte-sdk/ Choose the version with the highest release number.

The SDK package contains an installer, that can install Sentinel VoLTE as an out-of-the-box system. It is also an SDK allowing customisation of the product.

Warning You will need Metaswitch-supplied credentials to download the package.

Get required software

You’ll need the following software to run Sentinel VoLTE:

Software Download Link Documentation Link

Java JDK 8, update 172 or later


Apache Tomcat 7.0.39 or greater (7.0.x series or 8.5.x series, not 9.x.x series)


Rhino or later - optional - to be used when installing and configuring Rhino manually

Rhino 2.6.2 SDK from Artifactory

Rhino Documentation

Rhino Element Manager or later

REM Download Page

REM Documentation

Sentinel VoLTE SDK including out of the box installer

Sentinel VoLTE SDK, from Artifactory

Sentinel VoLTE SDK

Cassandra Database, version 3.11.2 or later version from the 3.11.x series. Cassandra is required for multiple functions including the SCC-AS, Rhino’s Session Ownership subsystem and the Rhino Key-value store subsystems.



Note that it is not necessary to configure auto-start (e.g. systemctl or init.d) for Cassandra or Tomcat.

Know the TAS cluster DNS domain name

The TAS needs to be able to resolve its own domain name as is defined in the IMS Initial Filter Criteria. This must be resolvable on all nodes in the cluster.

DNS is expected to be configured according to DNS SRV configuration.

The TAS domain name is asked for, in the TAS cluster DNS domain name? question during the Sentinel VoLTE application installation. For example, if the Initial Filter Criteria uses the Application Server URI sip:tas-cluster.example.com;transport=tcp, then the value entered should be tas-cluster.example.com. It is recommended that this domain name is resolvable prior to installation. The value can be adjusted after installation has completed, see: SIP SIS RA Network Interface changes.

Session Replication installation checklist

Session Replication is optional and is supported through the use of various Rhino subsystems (first introduced in Rhino 2.6.1), and enhancements to various application components installed into Rhino.

Note In order to install Sentinel VoLTE with Session Replication enabled, specific answers are required during both the Rhino production installation and Sentinel VoLTE application installation.

For the Rhino installation the questions and answers are:

  1. the Session Ownership Facility question answered with value True

  2. the Replicated Storage question answered with value KeyValueDatabase

  3. the Enable remote timer support? question answered with value True

All three of these questions must be answered correctly, as they affect code generation for applications on top of Rhino. Once applications are installed, the generated code cannot change. Hence only a re-install can change these values.

During the Sentinel VoLTE application installation answer Yes to the Session Replicated Enabled question:

  1. this question changes application configuration that can be updated post installation if desired (i.e. answering Yes or No does not preclude a later configuration change to enable/disable)

Note The installer sets a SIP SIS RA configuration property (DynamicSRVNameFormat) if replication is enabled.

Install and configure Rhino and the JVM

Optionally you can install and configure Rhino and the JVM for use with Sentinel VoLTE. This is recommended for production deployments, and clustered setups. It is required if using Session Replication. If using Session Replication, read the

Alternatively for Proof of Concept and lab functional testing it is recommended to use the Installer documented in Installing Sentinel VoLTE Services

If the installation is to use Session Replication, see the Session Replication installation checklist.

Install Rhino


Start by choosing a location to extract the contents of the Rhino package.

We’ll refer to this directory as RHINO_HOME.


Rhino must be started at least once to generate the necessary configuration files. To start Rhino, in the RHINO_HOME directory, execute:



Wait until Rhino is ready. It prints the following message in its log when ready:

SLEE successfully started on node(s) [101]


Stop Rhino by executing in the RHINO_HOME directory:

./stop-rhino.sh --node 101

(specifying the node ID of the local node)

Tip For more about installing and configuring the Rhino TAS, please see the Rhino v2.6.1 Documentation.

Configure Rhino and the JVM

If you want to install Sentinel VoLTE in top of an already running Rhino then this step must be performed. If you are letting the installer configure the Rhino SDK for you, this step can be skipped.

The following settings are needed:

Setting Configuration

Management database size

For a full Sentinel VoLTE install, the default Rhino 2.6.1 management database size is insufficient and should be increased to at least 400MB. To do this, edit RHINO_HOME/config/rhino-config.xml on all nodes, increasing the <committed-size> in the following section:



You’ll also need to configure the JVM:

For RhinoSDK: * The Rhino HEAP_SIZE setting should be set to 2560m at a minimum. * The recommended MAX_NEW_SIZE and NEW_SIZE setting for a Rhino node running Sentinel VoLTE is 1/4th of the total heap size (for example, 640m when the HEAP_SIZE is 2560m).

All of these settings can be found in RHINO_HOME/config/config_variables after running Rhino for the first time.

For Rhino Production:

The configuration will depend on the expected traffic characteristics and the hardware configuration. There is no general rule for a production setup and each project installation will require specific analysis.

Recommendations are:

  • The Rhino HEAP_SIZE setting should be set to 6144m at a minimum.

  • TieredCompilation is enabled by default in Java 8. It is recommended Sentinel VoLTE is run with a larger CodeCache. Use the JVM settings -XX:ReservedCodeCacheSize=768m and -XX:InitialCodeCacheSize=768m.

These options will need to be set in environment variables, either in the config_variables file or the read_config_variables script.

Socket permissions

If running the installer remotely, you will need to add the host address where the installer is running to the mlet configuration file. In addition, you’ll need to add the address of any Rhino Element Manager hosts and any remote hosts from which you might access the Rhino console.

  • For RhinoSDK the configuration file is RHINO_HOME/config/mlet.conf

  • For Rhino Production the configuration file is RHINO_HOME/node-xxx/config/permachine-mlet.conf

  • In the configuration file look for the xmltag <security-permission-spec> and add the following entry, replacing <IP ADDRESS> with your installer’s IP address:

    <mlet enabled="true">
		.... other entries

		permission java.net.SocketPermission "<IP ADDRESS>", "accept,resolve";

		.... other entries
Start Rhino to load the new configuration

To start Rhino, in the RHINO_HOME directory run ./start-rhino.sh.

This applies the Rhino and JVM configuration.

Get a license

Warning To install Sentinel VoLTE you need a license to run SIS, CGIN, and Sentinel VoLTE from Metaswitch. In order to obtain a license file, please contact Metaswitch. A full overview of license requirements can be found of this page: License Requirements.

If you allow the installer to install both Rhino SDK and Sentinel VoLTE for you, it will prompt you for the location of the license file.

If you prefer to set up Rhino manually, then you need to install the license file prior to installing Sentinel VoLTE.

To install your license file:


Make sure Rhino is started and running.


Go to the RHINO_HOME/client/bin directory.


In this directory, start the Rhino Console with the rhino-console script (or rhino-console.bat in Microsoft Windows).


In the Rhino Console execute, this command:

installlicense [PATH_TO_LICENSE_FILE]

([PATH_TO_LICENSE_FILE] should be relative to the RHINO_HOME/client/bin directory.)


If using the standard configuration, the following ports need to be open on the VoLTE TAS host’s firewall.

Port Purpose


SIP traffic


Secure SIP traffic




RMI Access

If using other configuration the firewall should be configured for those non-standard ports. Other ports may be opened as needed. For example if ssh is used to administer a node, then port 22 would be opened

Metaswitch product dependencies

Sentinel VoLTE is built on top of other Metaswitch products. The 3.0.0 series depends on the following series:

Product Series























FSM Tool




Previous page Next page
Sentinel VoLTE Version 3.0.0