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 OpenCloud Rhino installation, it makes sense to refer to other OpenCloud product dependencies

Download the Sentinel VoLTE SDK package

To get the latest Sentinel VoLTE SDK package go to 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 OpenCloud-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 7

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 2.5.0 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 2.1.17 or later version from the 2.1.x series. Cassandra is required for SCC-AS functionality

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

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.

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

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:

./ --node 101

(specifying the node ID of the local node)

Tip For more about installing and configuring the Rhino TAS, please see the Rhino v2.5 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 2.5 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 2048m at a minimum (for Java 7). For Java 8 use 2560m (to account for various changes in Java heap layout) * 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, 512m when the HEAP_SIZE is 2048m). * The MaxPermGen size should be increased from its default, to at least 512MB (for Java 7 only). To do this in Rhino 2.5, modify the flags -XX:MaxPermSize= and -XX:PermSize= in RHINO_HOME/config/jvm_args. For Java 8 this value is deprecated.

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 rule of thumb for production setup and each project installation will require specific analysis. The only requirement is the MaxPermGen set to at least 512MB. Since there is no jvm_args file on Rhino Production, this option will need to be set in environment variables, 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 "<IP ADDRESS>", "accept,resolve";

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

To start Rhino, in the RHINO_HOME directory run ./

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 OpenCloud. In order to obtain a license file, please contact OpenCloud. 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

OpenCloud product dependencies

Sentinel VoLTE is built on top of other OpenCloud products. The 2.7.0.x series depends on the following series:

Product Series



REM or later







SIS-EM or later











FSM Tool



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Sentinel VoLTE Version 2.7.0